1C-a01

Bi 系・鉄系線材

㧗ᙉᗘ 㻰㻵㻙㻮㻿㻯㻯㻻 ⥺ᮦ䛾㛤Ⓨ㻌㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠㻌㼛㼒㻌㼔㼕㼓㼔㻌㼟㼠㼞㼑㼚㼓㼠㼔㻌㻰㻵㻙㻮㻿㻯㻯㻻㻌㼣㼕㼞㼑㻌

Splice Resistance (nȍ)

㻌㛗㒊㻌 ࿃㑻㻘㻌 㘽ᒣ㻌 ▱ᏹ䠈ᒣᓮ㻌 ᾈᖹ䠈⳥ᆅ㻌 ᫀᚿ䠈୰ᓥ㻌 㝯ⰾ䠈Ṋ⏣㻌 ᐀୍㑻䠈㻌㛛㇂㻌 ⌶㑻㻘㻌 ᒸ⏣㻌 ᭸அ㻘㻌 ᑠᯘ㻌 ៅ୍㻘㻌 ᯘ㻌 ࿴ᙪ䠈ຍ⸨㻌 Ṋᚿ㻘㻌 㻌బ⸨㻌 ㅬ୍䠄ఫ཭㟁ᕤ䠅䠗໭ཱྀ㻌 ோ䠄㻺㻵㻹㻿䠅䠗ୗᒣ㻌 ῟୍䠄ᮾ኱䠅䠗㛗ᮧග㐀㻔ᛂ⛉◊㻕㻌㻻㻿㻭㻮㻱㻌㻳㼛㼞㼛䠈㻷㻭㻳㻵㼅㻭㻹㻭㻌㼀㼛㼙㼛㼔㼕㼞㼛䠈㻌 㼅㻭㻹㻭㼆㻭㻷㻵㻌㻷㼛㼔㼑㼕䠈㻌 㻷㻵㻷㼁㻯㻴㻵㻌㻹㼍㼟㼍㼟㼔㼕䠈㻌 㻺㻭㻷㻭㻿㻴㻵㻹㻭㻌㼀㼍㼗㼍㼥㼛㼟㼔㼕䠈㻌㼀㻭㻷㻱㻰㻭㻌㻿㼛㼕㼏㼔㼕㼞㼛䠈㻷㻭㻰㻻㼅㻭㻌㼠㼍㼗㼡㼞㼛㻘㻌㻻㻷㻭㻰㻭㻌㼀㼛㼙㼛㼥㼡㼗㼕㻘㻌㻷㻻㻮㻭㼅㻭㻿㻴㻵㻌㻿㼔㼕㼚㼕㼏㼔㼕䠈㻌 㻴㻭㼅㻭㻿㻴㻵㻌㻷㼍㼦㼡㼔㼕㼗㼛䠈㻌 㻷㻭㼀㻻㻌㼀㼍㼗㼑㼟㼔㼕㻘㻌 㻌㻿㻭㼀㻻㻌㻷㼑㼚㼕㼏㼔㼕㻔㻿㼡㼙㼕㼠㼛㼙㼛㻌㻱㼘㼑㼏㼠㼞㼕㼏㻌㻵㼚㼐㼡㼟㼠㼞㼕㼑㼟㻘㻌㻸㼀㻰㻚㻕㻧㻌㻷㻵㼀㻭㻳㼁㻯㻴㻵㻌㻴㼕㼠㼛㼟㼔㼕㻌㻔㻺㻵㻹㻿㻕㻧㻌 㻌㻿㻴㻵㻹㻻㼅㻭㻹㻭㻌㻶㼡㼚㻙㼕㼏㼔㼕㻌㻔㼀㼔㼑㻌㼁㼚㼕㼢㼑㼞㼟㼕㼠㼥㻌㼛㼒㻌㼀㼛㼗㼥㼛㻕䠗㻻㻿㻭㻹㼁㻾㻭㻌㻷㼛㼦㼛㻌㻔㻾㻵㻭㻿㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼛㼟㼍㼎㼑㻙㼓㼛㼞㼛㻬㼟㼑㼕㻚㼏㼛㻚㼖㼜㻌㻌㻌㻝䠊䛿䛨䜑䛻㻌
㼀㼍㼎㼘㼑㻚㻝㻌㻿㼜㼑㼏㼕㼒㼕㼏㼍㼠㼕㼛㼚㻌㼛㼒㻌㼀㼥㼜㼑㻌㻴㼀㻙㻺㼄㻌ᙜ ♫ 䛿 㖟 䝅 䞊 䝇 㻌 㻔㻮㼕㻘㻼㼎㻕㻞㻿㼞㻞㻯㼍㻞㻯㼡㻟㻻㼥㻌 ㉸ 㟁 ᑟ ⥺ ᮦ㻌Type HT-SS
Type HT-CA
Type HT-NX
㻔㻰㻵㻙㻮㻿㻯㻯㻻㻌 㻔㻰㼥㼚㼍㼙㼕㼏㼍㼘㼘㼥㻙㻵㼚㼚㼛㼢㼍㼠㼕㼢㼑㻌 㻮㻿㻯㻯㻻㻕㻕㻌 䜢〇ရ໬䛧
4.5+/-0.1mm
4.5+/-0.1mm
4.5+/-0.2mm
Average Width䛶௨᮶䚸㉸㟁ᑟᛂ⏝ᶵჾ䛻౑䜟䜜䛯ሙྜ䛾ᢏ⾡ⓗ䞉⤒῭ⓗAverage Thickness
0.29+/-0.02mm 0.34+/-0.02mm 0.31+/-0.03mm
Stainless steel
Copper alloy
Nickel alloy౯್䜢୍ᒙ㧗䜑䜛䛯䜑䚸ᛶ⬟ရ㉁ྥୖ䜔㧗ᙉᗘ໬䜈䛾ྲྀ䜚
Reinforcement tapettt(0.02mm)(0.05mm)(0.03mm )⤌䜏䜢⥆䛡䛶䛔䜛䚹㏆ᖺ䚸䝡䝇䝬䝇⣔㉸㟁ᑟ⥺ᮦ䜢౑⏝䛧䛯Critical Wire Tension (RT)
230N
280N
410N
ᐇド䜿䞊䝤䝹ヨ㦂䜔䝁䜲䝹ᛂ⏝䛸䛧䛶䝰䞊䝍㛤Ⓨ➼䚸ᵝ䚻䛺
270 MPa
250 MPa
400 MPa
Critical Tensile Stress (77K)
0.40%
0.30%
0.50%
Critical Tensile Strain (77K)
ヨ㦂䛜άⓎ䛻ᐇ᪋䛥䜜䛶䛔䜛䛜䚸㧗 ㉸㟁ᑟᛂ⏝䛾ᐇ⏝໬
Critical Double Bending Diameter (RT)
60mm
60mm
40mm
㻌
䛻ྥ䛡䛶䚸⥺ᮦ䛻ᑐ䛩䜛せồ䛿ཝ䛧䛟䛺䛳䛶䛝䛶䛔䜛䚹㧗☢ሙ㻌䝬䜾䝛䝑䝖ᛂ⏝䛻䛚䛔䛶㉸㟁ᑟ⥺ᮦ䛾ᘬᙇ≉ᛶ䛜 㻠㻜㻜㻹㻼㼍 ௨㻌ୖ䜢ᚲせ䛥䜜䛶䛔䛯⫼ᬒ䜒䛒䜚䚸ᡃ䚻䛿 㻺㼕 ྜ㔠䜢⏝䛔䛯㻌㻰㻵㻙㻮㻿㻯㻯㻻 ⥺ᮦ㻔㼀㼥㼜㼑㻌㻴㼀㻙㻺㼄㻕䜢㛤Ⓨ㼇㻝㼉䚸௒ᖺ䛾 㻠 ᭶䛛䜙㈍10000኎䛧䛶䛔䜛䚹㧗ᙉᗘ 㼀㼥㼜㼑㻌 㻴㼀㻙㻺㼄 ⥺ᮦ䛾ྛ✀≉ᛶ䛾ヨ㦂⤖1,355ᯝ䛸䚸ᐇ㐺⏝䛩䜛㝿䛻㔜せ䛸䛺䜛䚸⥺ᮦ䝇䝥䝷䜲䝇䠄䝆䝵䜲䞁䝖䠅
696
1000
361
䛻㛵䛩䜛ホ౯⤖ᯝ䜢ሗ࿌䛩䜛䚹㻌
175
㻌
63
100
42
㻞㻚㻌 㧗ᙉᗘ⥺ᮦ㻌 㼀㼥㼜㼑㻌㻴㼀㻙㻺㼄 䛾㛤Ⓨ㻌
31 26㧗☢ሙ䝬䜾䝛䝑䝖⏝㏵䛸䛧䛶ᘬᙇ≉ᛶ䛜 㻠㻜㻜㻹㻼㼍 ௨ୖ䛾⥺Type Hᮦ䜢ᚲせ䛸䛥䜜䛶䛔䛯⤒⦋䛜䛒䜚䚸㧗ᙉᗘ⥺ᮦ䛾㛤Ⓨ䜢䛧䛯䚹
10
Type HT-CAᖹ⥺䛸␗✀㔠ᒓ䝔䞊䝥䜢༙⏣䛷㞟ྜ䛩䜛䜘䛖䛺㞟ྜᮦ䛾ᶵᲔᙉᗘ䜢ྥୖ䛥䛫䜛䛯䜑䛻䛿䚸㼀㼥㼜㼑㻌 㻴 䜈䛾ṧ␃ᅽ⦰ᛂຊ䜢༳
1
Type HT-SSຍ䛩䜛䛣䛸䚸㧗ᙉᗘ⿵ᙉᮦᩱ䛾㑅ᐃ䛜㔜せ䛸䛺䜛㼇㻞㼉䚹ṧ␃ᅽ
Type HT-NX
⦰ᛂຊ䜢༳ຍ䛩䜛᪉ἲ䛸䛧䚸⥺ᮦ䛻వṍ䜏㻔㻼㼞㼑㻙㼠㼑㼚㼟㼕㼛㼚㻕䜢༳0ຍ䛩䜛᪉ἲ䛸䚸㼀㼥㼜㼑㻌 㻴 䛸⿵ᙉᮦᩱ䛾⇕⭾ᙇ⋡䛾㐪䛔䜢฼⏝
1
10
100
1000
䛧䛶 㼀㼥㼜㼑㻌 㻴 ⥺ᮦ䛻ᅽ⦰ᛂຊ䜢༳ຍ䛥䛫䜛᪉ἲ䛜䛒䜚䚸䛹䛱䜙
Lap length(mm)㻌䜒㧗ᙉᗘ⥺ᮦ䜢㛤Ⓨ䛩䜛䛖䛘䛷㠀ᖖ䛻ຠᯝ䛜䛒䜛䚹䜎䛯䚸ṧ㻲㼕㼓㻚㻝㻌㻿㼜㼘㼕㼏㼑㻌㼞㼑㼟㼕㼟㼠㼍㼚㼏㼑㻌㼛㼒㻌㻰㻵㻙㻮㻿㻯㻯㻻㻌㼣㼕㼞㼑㼟㻌㼍㼠㻌㻣㻣㻚㻟㻷㻚㻌␃ᅽ⦰ᛂຊ䜢 㼀㼥㼜㼑㻌㻴 ⥺ᮦ䛻༳ຍ䛩䜛䛯䜑䛻䛿䚸⿵ᙉᮦ䛾⪏㻌ຊ䚸䝲䞁䜾⋡䚸⇕⭾ᙇ⋡䛜㧗䛔஦䛜せồ䛥䜜䜛䚹ᘢ♫䛷䛿䚸ୖグ᳨ウ䛾⤖ᯝ䚸㻜㻚㻜㻟㼙㼙 ཌ䜏䛾 㻺㼕 ྜ㔠䝔䞊䝥䜢㑅ᐃ䚸㧗䝃䝥䝷䜲ᙇຊ䜢㈇Ⲵ䛩䜛䛣䛸䛷⥺ᮦ䛻వṍ䜏䛻䜘䜛ṧ␃ᅽ⦰ᛂຊ䜢༳ຍ䛧䛶⿵ᙉຍᕤ䛧䛯 㼀㼥㼜㼑㻌 㻴㼀㻙㻺㼄 䜢㛤Ⓨ䚸〇ရ໬䛧䛯䚹㻌㻌㻟㻚㻌㼀㼥㼜㼑㻌㻴㼀㻙㻺㼄 ⥺ᮦ≉ᛶホ౯㻌㼀㼥㼜㼑㻌 㻴㼀㻙㻺㼄 䛾௙ᵝ䜢 㼀㼍㼎㼘㼑㻝 䛻♧䛩䚹㻾㼀 䛾᭤䛢≉ᛶ䚸㻣㻣㻷 䛻䛚䛡䜛チᐜᘬᙇᛂຊ䛸䜒䛻ᚑ᮶䛾䚸㼀㼥㼜㼑㻌 㻴㼀 䛸ẚ㍑䛧䛶኱䛝䛟ྥୖ䛧䛶䛔䜛䚹䜎䛯䚸ᐇ㝿䚸⥺ᮦ䜢䝁䜲䝹ᕳ䛝䛩䜛㝿䛿䚸⥺ᮦ䜢䝇䝥䝷䜲䝇䛩䜛஦䛜᝿ᐃ䛥䜜䜛䚹㻲㼕㼓㻚㻝 䛻䚸㼀㼥㼜㼑㻌㻴㼀㻙㻺㼄 ⥺ᮦ䜢䝇䝥䝷䜲䝇䛧䛯ሙྜ䛾᥋⥆᢬ᢠ䛸䝷䝑䝥㛗䛾㛵ಀ䜢♧䛩䚹㼀㼥㼜㼑㻌 㻴㼀㻙㻺㼄 ⥺ᮦ䛾⿵ᙉᮦᩱ䛸䛧䛶౑⏝䛧䛶䛔䜛䚸㻌䝙䝑䜿䝹ྜ㔠䛿௚䛾⿵ᙉᮦᩱ䛸ẚ㍑䛩䜛䛸ẚ᢬ᢠ䛜㧗䛔䛯䜑䚸㻲㼕㼓㻌㻞㻚㻌㻼㼕㼏㼠㼡㼞㼑㻌㼛㼒㻌㼠㼔㼑㻌㻮㼑㼚㼐㼕㼚㼓㻌㻿㼜㼘㼕㼏㼑㻌㻹㼍㼏㼔㼕㼚㼑㻌ྠ䛨䝷䝑䝥㛗䛷ẚ㍑䛧䛯ሙྜ䚸㧗䛔᥋⥆᢬ᢠ䜢♧䛩䚹䝷䝑䝥㛗㻌䜢㛗䛟䛩䜛䛣䛸䛷䚸᥋⥆᢬ᢠ䜢ୗ䛢䜛஦䛜䛷䛝䜛䛜䚸᭤䛢≉ᛶ㻌䛜ᝏ䛟䛺䜛஦䛜ᠱᛕ䛥䜜䜛䚹䛣䜜䜙䛾ၥ㢟䜢ゎỴ䛩䜛䛯䜑䚸᭤ཧ⪃ᩥ⊩㻌䛢䛯≧ែ䛷䝇䝥䝷䜲䝇䛩䜛஦䛷䚸᭤䛢≉ᛶ䜢ᨵၿ䛩䜛஦䛜䛷㻝㻚㻌 㻺㼍㼗㼍㼟㼔㼕㼙㼍㻘㻌㼑㼠㻚㼍㼘㻚㻦㻌㻭㻿㻯㻞㻜㻝㻠㻘㻌㼜㼞㼑㼜㼞㼕㼚㼠㻌䛝䛺䛔䛛ヨసホ౯䛧䛯䚹ᐇ㝿䛻 㻲㼕㼓㻚㻞 䛻♧䛩䜘䛖䛺䚸᭤䛢䛺䛜㻞㻚㻌 㻷㻚㼅㼍㼙㼍㼦㼍㼗㼕㻘㼑㼠㻚㼍㼘㻦㻌 㻿㼡㼜㼑㼞㼏㼛㼚㼐㻚㻌 㻿㼏㼕㻚㻌 㼀㼑㼏㼔㼚㼛㼘㻚㻘㻌 㼢㼛㼘㻚㻌 㻞㻡㻌䜙䝇䝥䝷䜲䝇䛩䜛⿦⨨䜢ᑟධ䛧䚸᭤䛢䛯≧ែ䛷䝇䝥䝷䜲䝇⥺ᮦ㻔㻞㻜㻝㻞㻕㻌㼜㻚㻌㻜㻡㻠㻜㻝㻡㻌䜢ヨస䛧䚸䝇䝥䝷䜲䝇⥺ᮦ䛾᭤䛢ヨ㦂䜢ᐇ᪋䛧䛯䚹ホ౯⤖ᯝ䛻䛴䛔䛶ᙜ᪥ሗ࿌䛩䜛ணᐃ䛷䛒䜛䚹㻌̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-a02

Bi 系・鉄系線材

ၟ⏝ 㻮㼕㻞㻞㻞㻟 ⥺ᮦ䛾☢ሙୗ䛾㟁ὶ㍺㏦≉ᛶ䛾ᐃᘧ໬㻌㻭㼚㼍㼘㼥㼠㼕㼏㼍㼘㻌㼑㼤㼜㼞㼑㼟㼟㼕㼛㼚㻌㼛㼒㻌㼕㼚㻙㼒㼕㼑㼘㼐㻌㼏㼡㼞㼞㼑㼚㼠㻌㼠㼞㼍㼚㼟㼜㼛㼞㼠㻌㼜㼞㼛㼜㼑㼞㼠㼕㼑㼟㻌 㻌㼕㼚㻌㼠㼔㼑㻌㼘㼍㼠㼑㼟㼠㻌㼏㼛㼙㼙㼑㼞㼏㼕㼍㼘㼘㼥㻌㼍㼢㼍㼕㼘㼍㼎㼘㼑㻌㻮㼕㻞㻞㻞㻟㻌㼠㼍㼜㼑㻌㕥ᮌ㻌 ໶䠈㧗ᓮ㻌 ᘓ䠈࿅㻌 ⍅䠈኱ᮧ㻌 ಇ௓䠈஭ୖ㻌 ᫀ╬䠈ᮾᕝ㻌 ⏥ᖹ䠈ᮌ㡲㻌 㝯ᬸ䠄஑኱䠅㻌㻿㼁㼆㼁㻷㻵㻌㼀㼍㼗㼡㼙㼕㻘㻌㼀㻭㻷㻭㻿㻭㻷㻵㻌㻷㼑㼚㻘㻌㻸㼅㼁㻌㻸㼕㼚㻘㻌㻻㻹㼁㻾㻭㻌㻿㼅㼁㻺㻿㼁㻷㻱㻘㻌 㻌㻵㻺㻻㼁㻱㻌㻹㼍㼟㼍㼥㼛㼟㼔㼕㻘㻌㻴㻵㻳㻭㻿㻴㻵㻷㻭㼃㻭㻌㻷㼛㼔㼑㼕㻘㻌㻷㻵㻿㻿㻌㼀㼍㼗㼍㼚㼛㼎㼡㻔㻷㼥㼡㼟㼔㼡㻌㼁㼚㼕㼢㻚㻕㻱㻙㼙㼍㼕㼘㻦㻌㼟㼡㼦㼡㼗㼕㻬㼑㼑㼟㻚㼗㼥㼡㼟㼔㼡㻙㼡㻚㼍㼏㻚㼖㼜㻌㻟㻚㻌 ᐇ㦂⤖ᯝ䚸⪃ᐹ㻌㻲㼕㼓㻚㻝 䛻 㻣㻣㻌 㻷䚸㻡㻜㻌 㻷 䛻䛚䛡䜛ྛ☢ሙ䛾㟁ὶ㻙㟁ᅽ≉ᛶ䛸䝟䞊䝁䝺䞊䝅䝵䞁㌿⛣䝰䝕䝹䛻䜘䜛⌮ㄽ᭤⥺䜢♧䛩䚹䝟䞊䝁䝺䞊䝅䝵䞁㌿⛣䝰䝕䝹䛻⏝䛔䛯䝟䝷䝯䞊䝍䛿 㻾㼑㼒㻚㻌 㻝 䛾ᚑ᮶⥺ᮦ䛾䝟䝷䝯䞊䝍䜢⏝䛔䚸㟁ὶᐦᗘ䛾⤯ᑐ್䛾䜏 㻞㻚㻡 ಸ䛸䛧䛯䚹䛣䛾䜘䛖䛻䚸 ᗘ䚸☢ሙ౫Ꮡᛶ䛿ᚑ᮶⥺ᮦ䛾䝟䝷䝯䞊䝍䜢⏝䛔䛯ሙྜ䛷䜒䚸䛚䛚䜘䛭グ㏙䛷䛝䜛䛣䛸䛜ศ䛛䜛䚹䛭䛾䛯䜑䚸⤯ᑐ್䛿኱ᖜ䛻ྥୖ䛧䛶䛔䜛䛜䚸㔞Ꮚ໬☢᮰䛾䝢䞁Ṇ䜑≉ᛶ䛿䛒䜎䜚ኚ໬䛧䛶䛔䛺䛔䛸⪃䛘䜙䜜䜛䚹௨ୖ䛾⤖ᯝ䛿䚸᭱᪂䛾㻮㼕㻞㻞㻞㻟 ⥺ᮦ䛿ᚑ᮶⥺ᮦ䛸䛟䜙䜉䛶䝘䝜⤌⧊䛾ኚ໬䛿ᑡ䛺䛔䛜䚸␗┦䛾పῶ䜔䝣䜱䝷䝯䞁䝖䛾 㼏㼛㼚㼚㼑㼏㼠㼕㼢㼕㼠㼥 䛾኱ᖜ䛺ᨵၿ䛻䜘䛳䛶㉸ఏᑟ㒊䛾᭷ຠ᩿㠃✚䛜ቑຍ䛧䚸㻵㼏 䛜ྥୖ䛧䛶䛔䜛஦䜢♧䛧䛶䛔䜛䚹䜎䛯䚸㻳㼘㼍㼟㼟 㡿ᇦ䛛䜙 㻸㼕㼝㼡㼕㼐 㡿ᇦ䜈䛾㌿⛣☢ሙ 㻮㻳㻸䛾ẚ䛷䛒䜛䚸㻮㻳㻸㻛㻛㻌 㻛㻌 㻮㻳㻸䎹䜢ẚ㍑䛩䜛䛸䚸ᚑ᮶⥺ᮦ䛿 㻡㻚㻤 ⛬ᗘ䛻ᑐ䛧䚸᭱᪂⥺ᮦ䛿 㻡㻚㻞 䛸䛺䜚䚸ྠ⛬ᗘ䛷䛒䜛䛜䚸䜟䛪䛛䛻ᑠ䛥䛟䛺䛳䛶䛔䜛䚹䜘䛳䛶䚸㓄ྥᛶ䜢♧䛩 㼏 ㍈䛾ศᕸ䛜ከᑡ኱䛝䛟䛺䛳䛶䛔䜛䛣䛸䛜⪃䛘䜙䜜䜛䚹㻌㻲㼕㼓㻚㻟 䛻 㻣㻣㻌㻷䚸㻢㻡㻌㻷 䛻䛚䛡䜛☢ሙ༳ຍゅᗘ౫Ꮡᛶ䜢♧䛩䚹㻣㻣㻌㻷 䛷䛿䚸㻮㻛㻛㼏 ㍈᪉ྥ䛻 㻜㻚㻡㻌㼀 䛾☢ሙ䜢༳ຍ䛩䜛䛣䛸䛻䜘䜚䚸ᩘ 㻭 ⛬ᗘ䜎䛷 㻵㼏 䛜ῶᑡ䛧䛶䛔䜛䚹ྠᵝ䛻䚸㻢㻡㻌 㻷 䛷䛿 㻢㻜㻌 㻭 ⛬ᗘ䛸䛺䜚䚸ప 䛷䛿┦ᑐⓗ䛻␗᪉ᛶ䛜ᑠ䛥䛟䛺䜛䚹ᙜ᪥䛿䚸☢
ሙ༳ຍゅᗘ౫Ꮡᛶ䛻䛴䛔䛶䜒䚸䝟䞊䝁䝺䞊䝅䝵䞁㌿⛣䝰䝕䝹䛸 㼀㼕㼚㼗㼔㼍㼙 䛾 㻞㻰 䝰䝕䝹䛻㓄ྥᛶ䛾ᐤ୚䜢⪃៖䛧䛯䝰䝕䝹䜢⏝䛔䛶☢ሙ༳ຍゅᗘ౫Ꮡᛶ䛾ᐃᘧ໬䛻䛴䛔䛶䜒ሗ࿌䛩䜛䚹㻌ㅰ㎡䠖ᮏ◊✲䛾୍㒊䛿䚸JST 䛾ᡓ␎ⓗ䜲䝜䝧䞊䝅䝵䞁๰ฟ᥎㐍䝥䝻䜾䝷䝮䠄S-䜲䝜䝧䠅䛂ḟୡ௦㕲㐨䝅䝇䝔䝮䜢๰䜛㉸ఏᑟᢏ⾡䜲䝜䝧䞊䝅䝵䞁䛃䛾ຓᡂ䜢ᚓ䛶⾜䛳䛯䜒䛾䛷䛒䜛䚹ཧ⪃ᩥ⊩㻌㻝㻚㻌 㼀㻚㻌㻷㼕㼟㼟㻌㼑㼠 㼍㼘㻚㻘㻌㻭㼐㼢㼋㻯㼞㼥㼛㼓㼑㼚㼋㻱㼚㼓㻚㻘㻌㻠㻤㻌㻝㻜㻥㻝㻙㻝㻝㻜㻝㻌㻔㻞㻜㻜㻞㻕㻌̿̿

77K B//c
-5

V (V)

10

-6

10

-7

10

1

10

I (A)

100

1000

B = 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5 T-4

1050K B//c
-5

10
V (V)

㻞䠊ᐇ㦂᪉ἲ㻌ヨᩱ⥺ᮦ䛿ຍᅽ↝ᡂἲ䛻䜘䛳䛶సᡂ䛥䜜䛯䚸㻠㻚㻞㻌 㼙㼙㻌 ᖜ䛾㻮㼕㻞㻞㻞㻟 ⥺ᮦ䛷䛒䜛䚹㻣㻣㻌㻷䚸⮬ᕫ☢ሙ䛷䛾 㻵㼏 ್䛿⣙ 㻞㻜㻜㻌㻭 䛸䛺䜛䚹⮫⏺㟁ὶ䛿㏻㟁ἲ䛻䜘䜚 ᐃ䜢⾜䛳䛯䚹⥺ᮦ㛗䛿 㻝㻜㼏㼙䚸㟁ᅽ➃Ꮚ㛫㊥㞳䜢 㻠㻌㼏㼙䚸㟁⏺ᇶ‽䛿 㻝㻜㻙㻠㻌㼂㻛㼙 䛸䛧䛯䚹䝇䝥䝸䝑䝖䝨䜰䝬䜾䝛䝑䝖䜢⏝䛔䛶䚸᭱኱☢ሙ 㻡㻌㼀䚸㟁ὶ䛿 㻟㻜㻜㻌㻭 䜎䛷㏻㟁䜢⾜䛳䛯䚹㻌

B = 0.05, 0.1, 0.15, 0.2, 0.3, 0.4 T

-4

10

-6

10

-7

10

10

100

I (A)
Fig. 1 I-V characteristics in B//c(a) 77 K, (b) 50 K

1000

300
77K
65K
B = 0.5 T

250
200
Ic [A]

㻝䠊䛿䛨䜑䛻㻌㻮㼕 ⣔㧗 ㉸ఏᑟ⥺ᮦ䛿䚸㏆ᖺ䛾ຍᅽ↝ᡂἲ䛻䜘䜛⮫⏺㟁ὶᐦᗘ䛾ྥୖ䜔䚸㧗ᙉᗘ䛾⿵ᙉᮦ䜢⏝䛔䜛஦䛻䜘䜛ᘬᙇ䜚ᛂຊ䛸 㻼㼞㼑㻙㼠㼑㼚㼟㼕㼛㼚 䛻䜘䜛ᘬᙇ䜚䜂䛪䜏䛻ᑐ䛧䛶ඃ䜜䛯≉ᛶ䜢ᣢ䛴⥺ᮦ䛜స〇䛷䛝䜛䜘䛖䛻䛺䜚䚸䝬䜾䝛䝑䝖➼䛾㧗☢ሙᛂ⏝䜈䜒ᮇᚅ䛥䜜䛶䛔䜛䚹ᮏ◊✲䛷䛿⿵ᙉᮦ䛜䛺䛔⣲⥺䛸䛧䛶䛾᭱᪂䛾ၟ⏝ 㻮㼕㻞㻞㻞㻟 ⥺ᮦ䛻ᑐ䛧䚸☢ሙ౫Ꮡᛶ䚸☢ሙ༳ຍゅᗘ౫Ꮡᛶ䜢ᖜᗈ䛔 ᗘ䚸☢ሙ㡿ᇦ䛷䛾 ᐃ䜢⾜䛔䚸䝟䞊䝁䝺䞊䝅䝵䞁㌿⛣䝰䝕䝹䜢⏝䛔䛶䚸⮫⏺㟁ὶᐦᗘ䛾☢ሙ䚸 ᗘ䚸☢ሙ༳ຍゅᗘ౫Ꮡᛶ䛻䛴䛔䛶ᐃᘧ໬䜢⾜䛖䛸ඹ䛻䚸ᚑ᮶⥺ᮦ䛾≉ᛶ䛸䛾ẚ㍑䛻䛴䛔䛶ሗ࿌䛩䜛䚹㻌

150
100
50
0
-20

0

20

40

60

ș [degree]

80 100 120

Fig. 2 Magnetic field angle dependence of Ic
at 77 K and 65 K.
第92回

2015年度秋季低温工学・超電導学会

1C-a03

Bi 系・鉄系線材

X ⥺䝬䜲䜽䝻 CT 䛻䜘䜛 Bi2223 ⥺ᮦ䛾ᚤ⣽⤌⧊ᵓ㐀ゎᯒ㻹㼕㼏㼞㼛㼟㼠㼞㼡㼏㼠㼡㼞㼍㼘㻌㼍㼚㼍㼘㼥㼟㼕㼟㻌㼛㼒㻌㻮㼕㻞㻞㻞㻟㻌㼣㼕㼞㼑㻌㼎㼥㻌㼄㻙㼞㼍㼥㻌㼙㼕㼏㼞㼛㻙㻯㼀㻌஭ୖ㻌 ᫀ╬䠈ᮾᕝ㻌 ⏥ᖹ䠈ᮌ㡲㻌 㝯ᬸ 䠄஑኱䠅
INOUE Masayoshi䠈 HIGASHIKAWA Kohei䠈KISS Takanobu (Kyushu Univ.)
E-mail: inoue@ees.kyushu-u.ac.jp1䠊䛿䛨䜑䛻
ᡃ䚻䛾◊✲䜾䝹䞊䝥䛷䛿䚸Bi2223 㧗 ㉸ఏᑟ⥺ᮦ䛻䛚䛔䛶䚸⮫⏺㟁ὶᐦᗘ Jc 䜢ไ㝈䛩䜛Ḟ㝗㒊఩䛜⥺ᮦ㛗ᡭ᪉ྥ䛻
Ⅼᅾ䛧䛶䛔䜛䛣䛸䜢㧗ゎീᗘ䛾☢Ẽ㢧ᚤほᐹ䛻䜘䛳䛶᫂䜙䛛䛸䛧䛯䚹䛣䛾 Jc ไ㝈ᅉᏊ䜢⪃ᐹ䛩䜛䛯䜑䛻䛿ᚤ⣽ᵓ㐀䛾ゎᯒ䛜ᚲせ୙ྍḞ䛷䛒䜛䛜䚸୍⯡ⓗ䛻⾜䜟䜜䜛㧗ศゎ⬟ගᏛ㢧ᚤ㙾䜔 SEM 䛷䛾ほᐹ䛷䛿ヨᩱ䛾◚ቯ䜢క䛖䛯䜑䚸Ag 䜢ẕᮦ䛸䛧䛶ከᩘ䛾䝣䜱䝷䝯䞁䝖䛛䜙ᡂ䜛 Bi2223 ⥺ᮦ䛾ᵓ㐀䜢 3 ḟඖⓗ䛻᫂䜙䛛䛸䛩䜛䛣䛸䛿ᅔ㞴䛷䛒䜛䚹䛭䛣䛷䚸ᮏ◊✲䛷䛿 X ⥺䝬䜲䜽䝻 CT 䜢⏝䛔䛶䚸Bi2223 ⥺ᮦ䛾ᚤ⣽⤌⧊䜢㠀◚ቯ䛻䛛
䛴 3 ḟඖ䛷ほ 䛩䜛䛣䛸䜢ヨ䜏䛯䚹2䠊ᐇ㦂⤖ᯝཬ䜃⪃ᐹ
Bi2223 ⥺ᮦ䠄Type-H䠅䛾⥺ᮦ㛗ᡭ᪉ྥ䛻ᑐ䛩䜛⮫⏺㟁ὶศᕸ䜢㉮ᰝᆺ䝩䞊䝹⣲Ꮚ☢Ẽ㢧ᚤ㙾䠄SHPM䠅䛻䜘䜚ィ 䛧䛯䛸䛣䜝䚸Fig.1 䛻♧䛩䜘䛖䛺ప Ic 㒊䛜Ⅼᅾ䛩䜛䛣䛸䛜☜ㄆ䛥䜜䛯䚹䛭䛣䛷䚸SHPM 䛻䛶 Ic ศᕸほᐹ䜢⾜䛳䛯㒊఩䛾ᵓ㐀ほᐹ䜢 X ⥺䝬䜲䜽䝻 CT 䛻䛶⾜䛳䛯䚹X ⥺ CT 䛿䚸ヨᩱ䛻ᖹ⾜ X⥺䜢↷ᑕ䛧䛯㝿䛾 X ⥺㏱㐣ീ䜢䚸ヨᩱ䜢ᅇ㌿䛥䛫䛺䛜䜙᩿⥆ⓗ䛻᧜ᙳ䛧䚸䛭䜜䜙䜢⏬ീฎ⌮䛩䜛䛣䛸䛻䜘䜚 X ⥺᩿ᒙ⏬ീ䜢ᚓ䜛䜒䛾䛷䛒䜛䚹ᮏ◊✲䛷䛿ᩘPm 䛾✵㛫ศゎ⬟䛷䛾ィ 䛜ྍ⬟䛺 X ⥺䝬䜲䜽䝻 CT䠄X-ray ȝ-CT Skyscan1272, Bruker ♫〇䠅䜢⏝䛔䛶ᵓ㐀ほᐹ䜢⾜䛳䛯 1)䚹
Fig.2 䛻 X ⥺䝬䜲䜽䝻 CT 䛻䜘䜚ᚓ䜙䜜䛯 Bi2223 ⥺ᮦ䛾᩿㠃ീ䜢♧䛩䚹ྠᅗ䛿䚸10Pm 䛾✵㛫ศゎ⬟䛷㛗ᡭ᪉ྥ 13mm
㛗䛻䜟䛯䜚ほᐹ䛧䛯౛䛷䚸䝔䞊䝥㠃䛻ᑐ䛩䜛᩿㠃ീ䛷䛒䜛䚹X⥺྾཰⋡䛾㧗䛔㒊఩䜋䛹᫂ᗘ䛜㧗䛔䛣䛸䛛䜙䚸ⓑⰍ䛾㒊఩䛿䝅䞊䝇ᮦ䛜䚸㯮Ⰽ䛾㒊఩䛿 Bi2223 䛜ᨭ㓄ⓗ䛺㡿ᇦ䛻ᑐᛂ䛧䛶䛔䜛䚹ྠᅗ䜘䜚䚸Bi2223 䝣䜱䝷䝯䞁䝖䛾⥺ᮦ㛗ᡭ᪉ྥ䛾ᵓ㐀䜢ྍど໬䛷䛶䛝䛶䛔䜛䛣䛸䛜ศ䛛䜛䚹ప Jc 䛾ཎᅉ䜢᳨ウ䛩䜛䛯䜑䚸✵㛫ศゎ⬟䜢 1.9Pm 䜎䛷ୖ䛢䛶䚸ప Jc 㒊䛸㧗 Jc 㒊䛾 X ⥺䝬䜲䜽䝻 CT ほᐹ䜢⾜䛳䛯䚹ᚓ䜙䜜䛯 X ⥺䝬䜲䜽䝻 CT ീ䜢 2 ್໬䛧䛶ẚ㍑䛧䛯䛾䛜 Fig.3 䛷䛒
䜛䚹2 ್໬䛻㝿䛧䛶䛿䚸䝣䜱䝷䝯䞁䝖ᵓ㐀䜢ぢ᫆䛟䛩䜛䛯䜑ⓑ㯮཯㌿ฎ⌮䜢⾜䛔䚸Bi2223 䛻┦ᙜ䛩䜛㡿ᇦ䜢ⓑⰍ䛻䚸䝅䞊䝇ᮦ䛻┦ᙜ䛩䜛㡿ᇦ䜢㯮Ⰽ䛻䛧䛶䛔䜛䚹୧ᅗ䛾ẚ㍑䛛䜙䚸㧗 Jc
㒊䛷䛿 Bi2223 䝣䜱䝷䝯䞁䝖䛜ྠ⛬ᗘ䛾ᖜ䛷㛗ᡭ᪉ྥ䛻ὶ䜜䛶䛔䜛䛾䛻ᑐ䛧䛶䚸ప Jc 㡿ᇦ䛷䛿 Bi2223 䝣䜱䝷䝯䞁䝖䛜㛗ᡭ᪉ྥ䛻᩿⥆ⓗ䛸䛺䛳䛶䛔䜛ᵝᏊ䛜☜ㄆ䛷䛝䜛䚹䛣䛾䛣䛸䛿䚸Bi2223
䝣䜱䝷䝯䞁䛾஘䜜䛻䜘䜚㟁ὶ䝟䝇䛜పῶ䛧䛶䚸⮫⏺㟁ὶ≉ᛶ䜢పῶ䛥䛫䛶䛔䜛䛣䛸䜢♧၀䛧䛶䛔䜛䚹௨ୖ䜘䜚䚸X ⥺䝬䜲䜽䝻 CT 䛜 Bi2223 ⥺ᮦ䛾ෆ㒊ᵓ㐀䜢㠀◚ቯ䛛䛴 3 ḟඖ䛻ほᐹ䛩䜛ᡭἲ䛸䛧䛶᭷ຠ䛷䛒䜛䛣䛸䛜᫂䜙䛛䛸䛺䛳䛯䚹ᙜ᪥䛿䚸Bi2223 䝣䜱䝷䝯䞁䝖䛾 3 ḟඖᵓ㐀➼䛾ヲ⣽䛻䛴䛔䛶䜒ሗ࿌䛩䜛䚹ㅰ㎡ᮏ◊✲䛾୍㒊䛿䚸JST䛾ᡓ␎ⓗ䜲䝜䝧䞊䝅䝵䞁๰ฟ᥎㐍䝥䝻䜾䝷䝮䠄S-䜲䝜䝧䠅䛂ḟୡ௦㕲㐨䝅䝇䝔䝮䜢๰䜛㉸ఏᑟᢏ⾡䜲䝜䝧䞊䝅䝵䞁䛃䛾ᨭ᥼䛻䜘䛳䛶⾜䜟䜜䛯䜒䛾䛷䛒䜛䚹Fig.1 Jc distribution of Bi2223 wire measured by SHPM

Fig.2 X-ray micro-CT images for Bi2223 wire(a) high-Jc region(b) low-Jc region
Fig.3 Binary images of X-ray tomography for Bi2223 wire.
White area indicates Bi2223 filaments whereas black area
indicates sheath material. Image size is 2.6mm u 3.2mm.
ཧ⪃ᩥ⊩
1. M. Inoue, et al.: Abstracts of CSJ Conference, Vol. 91(2015) p.183

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㖟⟶ෆ䛷స〇䛧䛯 Bi2223 ↝⤖య䛾⮫⏺㟁ὶ≉ᛶ䛻ᑐ䛩䜛䝫䝇䝖䜰䝙䞊䝹ຠᯝ
Post-annealing effects on critical current properties of Bi2223 sintered bulks synthesized in Ag tubesṊ⏣ Ὀ᫂䠈ྂᮌ ᫀᏹ䠈Ⲷ㔝 ᣅ䠈ᓊᑿ ග஧ (ᮾ኱㝔ᕤ) ;ୗᒣ ῟୍ (㟷Ꮫ኱) ; ୰ᓥ 㝯ⰾ䠈㘽ᒣ ▱ᏹ䠈ᑠᯘ ៅ୍䠈ᯘ ࿴ᙪ (ఫ཭㟁ᕤ)
TAKEDA Yasuaki䠈FURUKI Masahiro䠈OGINO Hiraku䠈KISHIO Kohji (Univ. of Tokyo) ;SHIMOYAMA Jun-ichi (Aoyama gakuin Univ.) ; NAKASHIMA Takayoshi䠈KAGIYAMA Tomohiro䠈
KOBAYASHI Shin-ichi䠈HAYASHI Kazuhiko (Sumitomo Electric Industries)
E-mail: 0591908153@mail.ecc.u-tokyo.ac.jp㻝䠊䛿䛨䜑䛻㻌
䛣䜜䜎䛷䛻ᡃ䚻䛿䚸Bi2-xPbxSr2Ca2Cu3Oy (Bi2223) 䛾↝⤖య䛻䛚䛡䜛⢏㛫 Jc 䛾ྥୖ䛻䜐䛡䛶䚸ᚤ⣽⤌⧊䛾ไᚚ䜔㧗䝫䝇䝖䜰䝙䞊䝹㐣⛬䛾ᑟධ䛺䛹䛜㔜せ䛺ᅉᏊ䛷䛒䜛䛣䛸䜢ぢฟ䛧䛶䛝䛯䚹๓ᅇ䛿 Ag ⟶ෆ䛷↝⤖య䜢స〇䛩䜛ሙྜ䛻䚸
Bi2223 ┦⏕ᡂ䛾䛯䜑䛾 1 ḟ↝ᡂ䛾 ᗘ䜢ẚ㍑ⓗప 䛸䛧䚸୍㍈䝥䝺䝇ᅽຊ䜢 100 MPa 䛻ᢚ䛘䜛䛣䛸䛜㧗 Jc ໬䛻᭷ຠ䛷䛒䜛䛣䛸䜢ሗ࿌䛧䛯[1]䚹䛥䜙䛻㑏ඖ䝫䝇䝖䜰䝙䞊䝹᮲௳䛸䛧䛶䚸㖟䝅䞊䝇⥺ᮦ䛾ሙྜ䜘䜚䜒㧗 䛾䜰䝙䞊䝹䛜᭷ຠ䛷䛒䜛䛣䛸䛜♧၀䛥䜜䛶䛔䛯䛯䜑䚸ᮏ◊✲䛷䛿䚸ప 1 ḟ↝ᡂ䛻䜘䜚స〇䛧䛯↝⤖య䛻ᑐ䛩䜛䝫䝇䝖䜰䝙䞊䝹ຠᯝ䛾᳨ド䜢⾜䛳䛯䚹ヨᩱ䛾ᵓᡂ┦䛸㉸ఏᑟ≉ᛶ䜢ㄪ䜉䚸⢏㛫 Jc 䛾ྥୖ䜢ヨ䜏䛯䚹㻞䠊ᐇ㦂᪉ἲ㻌✵Ẽ୰ 780°C, 6 h 䛾௬↝䛻䜘䜚ᚓ䜙䜜䛯 Bi2212 䜢୺┦䛸䛩䜛๓㥑య⢊ᮎ䜢 Ag ⟶䛻඘ሸ䛧䚸100 MPa 䛾୍㍈䝥䝺䝇䛻䜘 䛳 䛶 ᯈ ≧ 䛻 ᡂ ᆺ 䛧 䛯 ᚋ 䛻 815°C, 18 h, PO2 = 3 kPa(3%O2/Ar Ẽὶ୰)䛷 1 ḟ↝ᡂ䛧 Bi2223 ┦䜢⏕ᡂ䛥䛫䛯䚹⦓ᐦ໬䛾䛯䜑෌ᗘ 100 MPa 䛷୍㍈䝥䝺䝇䜢᪋䛧䚸825°C, 6 h,
PO2 = 3-8 kPa 䛾 2 ḟ↝ᡂ䜢⾜䛖䛣䛸䛷 Bi2223 ↝⤖య䜢స〇䛧䛯䚹䛺䛚↝ᡂ䛻䛚䛔䛶䛿᭱ᚋ䛻 3 h 䛷 20°C ୗ䛢䜛ᚎ෭㐣⛬䜢ᑟධ䛧䛯䚹䛣䜜䜙 Ag ⟶ෆ䛾↝⤖య䛾୍㒊䛻ᑐ䛧䛶 PO2 =0.5-1 kPa ୗ䚸720-780°C 䛷 24-100 h䚸㔠ᒓ⤌ᡂไᚚ䛸⢏⏺≉ᛶ䛾ᨵၿ䜢┠ⓗ䛸䛧䛯㑏ඖ䝫䝇䝖䜰䝙䞊䝹䜢⾜䛳䛯䚹↝⤖య䛾㓟⣲㔞䛿 Ag ⟶ෆ䛛䜙ྲྀ䜚ฟ䛧䛯ᑠ∦ヨᩱ䛻ᑐ䛧䚸㓟⣲Ẽὶ୰䛷 250-450°C 䛾䜰䝙䞊䝹䛻䜘䜚ไᚚ䛧䛯䚹ヨᩱ䛾ᵓᡂ┦䜢⢊ᮎ X ⥺ᅇᢡ ᐃ䛻䜘䜚䚸㟁Ẽ᢬ᢠ⋡䛾 ᗘ౫Ꮡᛶ䜢஺ὶᅄ➃Ꮚἲ䛻䜘䜚䚸㉸ఏᑟ≉ᛶ䛿 SQUID ☢᮰ィ䜢⏝䛔䛯☢
໬ ᐃ䛻䜘䛳䛶ホ౯䛧䛯䚹☢ሙ䛿䝥䝺䝇㠃䛻ᆶ┤䛻༳ຍ䛧䚸⢏㛫 Jc 䛿ṧ␃☢໬ἲ䛻䜘䜚ㄪ䜉䛯䚹㻟䠊⤖ᯝ䛸⪃ᐹ㻌
2 ḟ↝ᡂᚋ䛾↝⤖యヨᩱ䜢 AS䚸㑏ඖ䝫䝇䝖䜰䝙䞊䝹ᚋ䛾ヨᩱ䜢 PA 䛸グ䛩䚹⢊ᮎ XRD 䝟䝍䞊䞁䜘䜚඲䛶䛾 AS ヨᩱ䛷Bi2223 䛜༢┦䛷䛒䛳䛯䚹PO2 = 5 kPa 䛷 2 ḟ↝ᡂ䛧䛯ᚋ䚸
250°C, 12 h 䛚䜘䜃 300-450°C, 1 h 䛾㓟⣲䜰䝙䞊䝹䛻䜘䜚㓟⣲㔞ไᚚ䜢⾜䛳䛯 AS ヨᩱ䛾 20 K 䛻䛚䛡䜛⢏㛫 Jc 䜢 Fig. 1 䛻♧䛩䚹350°C ௨ୗ䛾䜰䝙䞊䝹䛷䛿㐣๫㓟⣲㔞䛾ቑຍ䛻䜘䜛⢏㛫 Jc 䛾ྥୖ䛜ぢ䜙䜜䚸䛣䜜䜎䛷䛻ప 䛾䜰䝙䞊䝹䛷䛿ᖹ⾮䛻㐩䛩䜛䜎䛷㛗᫬㛫䜢せ䛩䜛䛣䛸䚸䛚䜘䜃 400°C ௨ୖ䛾䜰䝙䞊䝹䛷䛿⢏㛫 Jc 䛜ྥୖ䛧䛺䛔䛣䛸䛜䜟䛛䛳䛶䛝䛶䛔䜛䚹᭱㐺㓟⣲䜰䝙䞊䝹᮲௳䛾ヲ⣽䛻䛴䛔䛶䛿ᙜ᪥ሗ࿌䛩䜛䚹AS ヨᩱ䛷䛿 2 ḟ↝ᡂ᫬䛾 PO2 䛾ୖ᪼䛻క䛳䛶⢏⏺≉ᛶ䛜ຎ໬䛩䜛䛣䛸䛜♧၀䛥䜜䛯䛯䜑䚸PO2 = 3, 5 kPa 䛷 2 ḟ↝ᡂ䜢⾜䛳䛯 AS ヨᩱ䛻ᑐ䛧 PO2 = 1 kPa 䛾㑏ඖ䝫䝇䝖䜰䝙䞊䝹䜢᪋
䛧䛯䚹Fig. 2 䛻 350°C, 1 h 䛾㓟⣲䜰䝙䞊䝹䛻䜘䜚㓟⣲㔞ไᚚ䜢⾜䛳䛯↝⤖య䛾☢໬⋡䛾 ᗘ౫Ꮡᛶ䜢♧䛩䚹720°C 䛷䜰䝙䞊䝹䛧䛯 PA ヨᩱ䛷䛿䚸Tc 䛿 AS ヨᩱ䛻ẚ䜉~2 K ྥୖ䛧䛶䛚䜚㔠ᒓ⤌ᡂไᚚ䛜⾜䜟䜜䛯䛣䛸䛜♧၀䛥䜜䛯䜒䛾䛾䚸㉸ఏᑟ㌿⛣䛿䝤䝻䞊䝗䛸䛺䛳䛶䛚䜚䚸Pb3221 䛾⏕ᡂ䛻䜘䜚⢏⏺≉ᛶ䛜ຎ໬䛩䜛䛣䛸䛜䜟䛛䛳䛯䚹୍᪉䛷 780°C 䛷䜰䝙䞊䝹䛧䛯 PA
ヨᩱ䛷䛿 100 h 䛾䜰䝙䞊䝹ᚋ䛻䛚䛔䛶䜒 Pb3221 䛾⏕ᡂ䛜ᢚไ䛷䛝䛯䚹Tc 䛾ྥୖ䛿ᑠ䛥䛔䛜㉸ఏᑟ㌿⛣䛿䝅䝱䞊䝥䛸䛺䛳䛶䛚䜚䚸⢏⏺≉ᛶ䛜ᨵၿ䛥䜜䜛䛣䛸䛜䜟䛛䛳䛯䚹⌧≧䛷䛿 ASヨᩱ䛸 780°C 䛷䜰䝙䞊䝹䛧䛯 PA ヨᩱ䛸䜒䛻 20 K 䛻䛚䛡䜛⢏㛫 Jc 䛿~5 kA cm-2 䛸䜰䝙䞊䝹䛻䜘䜛㢧ⴭ䛺ᨵၿ䛿ぢ䜙䜜䛶䛔䛺䛔䛜䚸PA ヨᩱ䛻䛚䛡䜛⢏⏺≉ᛶ䛾ᨵၿ䜢⪃៖䛩䜛䛸䚸ẚ㍑ⓗ㧗 䛷䛾䜰䝙䞊䝹᮲௳䛾᭱㐺໬䛻䜘䜚⮫⏺㟁ὶ≉ᛶ䛾኱䛝䛺ᨵၿ䛜ぢ㎸䜎䜜䜛䚹ᙜ᪥䛿 PO2 = 0.5 kPa ୗ䛷䜰䝙䞊䝹䛧䛯 PA ヨᩱ䜢ྵ䜑䛶⢏㛫 Jc ᨵၿ䛾ᣦ㔪䜢㆟ㄽ䛩䜛䚹ཧ⪃ᩥ⊩㻌
1. Y. Takeda, et al.: Abstracts of CSJ Conference, Vol. 91(2015) p.154

Fig. 1 Oxygen annealing temperature dependence of intergrain
Jc at 20 K for Bi2223 sintered bulks.

Fig. 2 Temperature dependences of ZFC magnetization for
Bi2223 sintered bulks.

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㻔㻮㼕㻘㻼㼎㻕㻞㻿㼞㻞㻯㼍㻞㻯㼡㻟㻻㼥 ㉸ఏᑟⷧ⭷䛾⮫⏺㟁ὶᐦᗘ䛻ᑐ䛩䜛ῧຍ≀䛾ຠᯝ㻌㼀㼔㼑㻌㼑㼒㼒㼑㼏㼠㻌㼛㼒㻌㼕㼙㼜㼡㼞㼕㼠㼥㻌㼍㼐㼐㼕㼠㼕㼛㼚㻌㼛㼚㻌㼏㼞㼕㼠㼕㼏㼍㼘㻌㼏㼡㼞㼞㼑㼚㼠㻌㼐㼑㼚㼟㼕㼠㼥㻌 㻌㼕㼚㻌 㻔㻮㼕㻘㻼㼎㻕㻞㻿㼞㻞㻯㼍㻞㻯㼡㻟㻻㼥㻌㻔㻮㼕㻘㻼㼎㻞㻞㻞㻟㻕㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㼠㼔㼕㼚㻌㼒㼕㼘㼙㻌᱓ཎ㻌 㑈㻘㻌 㓇஭㻌 ࿘☻㻘㻌 ⸨ྜྷ㻌 Ꮥ๎㻘㻌 ᮎྜྷ㻌 ဴ㑻䠄⇃ᮏ኱䠅㻧㻌 ᯇᮏ㻌 ᫂ၿ䠄㻺㻵㻹㻿䠅㻌㻷㼁㼃㻭㻴㻭㻾㻭㻌㼀㼛㼞㼡㻘㻌㻿㻭㻷㻭㻵㻌㻿㼥㼡㼙㼍㻘㻌㻲㼁㻶㻵㼅㻻㻿㻴㻵㻌㼀㼍㼗㼍㼚㼛㼞㼕㻘㻌㻿㼁㻱㼅㻻㻿㻴㻵㻌㼀㼑㼠㼟㼡㼞㼛㻌㻔㻷㼡㼙㼍㼙㼛㼠㼛㻌㼁㼚㼕㼢㻕㻧㻌 㻌㻹㻭㼀㻿㼁㻹㻻㼀㻻㻌㻭㼗㼕㼥㼛㼟㼔㼕㻌㻔㻺㻵㻹㻿㻕㻌㻱㻙㼙㼍㼕㼘㻧㻌㼗㼡㼣㼍㼔㼍㼞㼍㻬㼟㼠㻚㼏㼟㻚㼗㼡㼙㼍㼙㼛㼠㼛㻙㼡㻚㼍㼏㻚㼖㼜㻌㻝㻚㻌 䛿䛨䜑䛻Bi ⣔㧗࡞ Jc ࡢྥୖࡀぢࡽࢀࡿࠋࡇࡢࡇ࡜࠿ࡽࠊῧຍ≀ࡣ 3 ḟ㉸ఏᑟయࡣ⮫⏺

ᗘ Tc ࡀ㧗ࡃࠊ1km ௨ୖࡢ⥺ඖࣆࣥࢽࣥࢢࢭࣥࢱ࣮࡜ࡋ࡚ാ࠸࡚࠸ࡿࡇ࡜ࡀࢃ࠿ࡿࠋ

ᮦࡀ㛤Ⓨࡉࢀࠊᵝࠎ࡞ᶵჾ࡬ࡢᛂ⏝࡬ྥࡅ࡚◊✲ࡀ⾜ࢃ

Table 1 Amount of impurity additionࢀ࡚࠸ࡿࠋࡋ࠿ࡋᐇ⏝໬ࡢࡓࡵ࡟ࡣ⮫⏺㟁ὶᐦᗘ Jc ࡢ᭦࡞ࡿྥୖࡀᚲせ࡛࠶ࡿࠋᮏ◊✲࡛ࡣࠊDC ࣐ࢢࢿࢺࣟࣥࢫ

sample nameimpurity addition

amountTc

Bi-pure

-

-

86.8K

Bi-Hf

Hf

3mol%

95.0K

Bi-Nb

Nb

5mol%

93.6K

Bi-Zr

Zr

3mol%

93.0K

Bi-La

La

5mol%

-

ࣃࢵࢱἲ࡟ࡼࡾ(Bi,Pb)2Sr2Ca2Cu3Oy (Bi,Pb2223)ⷧ⭷ࢆస〇ࡋࠊࡑࡢ㝿࡟ࣆࣥࢽࣥࢢࢭࣥࢱ࣮࡜ࡋ࡚ᵝࠎ࡞ῧຍ≀㸦Hf, Nb, Zr, La, Al, Ag㸧ࢆῧຍࡋ࡚㉸ఏᑟ≉ᛶ࡟ᑐࡍࡿ
ᙳ㡪ࢆㄪ࡭ࡓࠋ㻞㻚㻌 ᐇ㦂᪉ἲ

Bi-Al

Al

10mol%

93.8K

 Bi,Pb2223 ⷧ⭷ࡣ DC ࣐ࢢࢿࢺࣟࣥࢫࣃࢵࢱἲࢆ⏝࠸࡚

Bi-Ag

Ag

10mol%

90.3K

స〇ࡋࡓࠋࢱ࣮ࢤࢵࢺ࡜ࡋ࡚ Bi1.5Pb1.0Sr2.0Ca2.5Cu3.0Ox ࡟ᑐࡋ࡚ῧຍ≀ࢆᑟධࡋࡓ≀ࢆ⏝࠸ࠊ㓟⣲ᅽ 50Paࠊฟຊ
100Wࠊᇶᯈ

ᗘ 700Υ࡛ 2.5 ᫬㛫〇⭷ࢆ⾜࠸ࠊSTO ᇶᯈୖ࡟ཌࡉ 300nm ⛬ᗘࡢⷧ⭷ࢆሁ✚ࡉࡏࡓࠋࡑࡢᚋࠊస〇ࡋࡓⷧ⭷ࢆ Bi,Pb2223 ࣌ࣞࢵࢺ࡛ໟࡳ኱Ẽ୰࡟࠾࠸࡚
840Υ࡛ 100 ᫬㛫࢔ࢽ࣮ࣝฎ⌮ࢆ⾜࠸ࠊ᭦࡟㓟⣲㞺ᅖẼ୰࡟࠾࠸࡚ 450Υ࡛ 10 ᫬㛫࢔ࢽ࣮ࣝฎ⌮ࢆ⾜ࡗࡓࠋ[1] ῧຍ≀ࡣ Hf, Nb, Zr, La, Al, Ag ࡢ㸴✀㢮࡛࠶ࡿࠋྛῧຍ
㔞ࢆ Table㸯࡟♧ࡍࠋ㻟㻚㻌 ᐇ㦂⤖ᯝ ᢬ᢠ⋡Tc ࢆᗘ౫Ꮡᛶࡢ

Fig.1 Magnetic field dependence of Jc (77.3K B//c)ᐃ࠿ࡽࠊTable 1 ࡟♧ࡍࡼ࠺࡟

ᐃࡋࡓࠋLa ࢆ㝖ࡃ඲࡚ࡢῧຍ≀࡟࠾࠸࡚ Bi-pure࡟ẚ࡭࡚ Tc ࡢୖ᪼ࡀぢࡽࢀࡓࠋࡇࢀࡣῧຍ࡟ࡼࡗ࡚
Bi2212 ࡞࡝ࡢ␗┦ࡀῶᑡࡋࡓࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ
୍᪉ La ῧຍࡢヨᩱࡣ 60K ࡲ࡛᢬ᢠ⋡ࡢపୗࡀぢࡽࢀ࡞࠿ࡗࡓࠋTc ࡀ᭱ࡶ㧗࠸ࡢࡣ Hf ࢆῧຍࡋࡓࢧࣥࣉ࡛ࣝ࠶ࡗ
ࡓࡀࠊῧຍ㔞࡜ Tc ࡢ㛫࡟ࡣ┦㛵ࡣぢࡽࢀ࡞࠿ࡗࡓࠋ
☢ሙࢆ c ㍈࡟ᖹ⾜࡟༳ຍࡋࡓ࡜ࡁࡢ Jc ࡢ☢ሙ౫Ꮡᛶࢆ
Fig.1 ࡟♧ࡍࠋ඲࡚ࡢ☢ሙ⠊ᅖ࡟࠾࠸࡚ Hf ῧຍࢆ⾜ࡗࡓBi-Hf ࡢ≉ᛶࡀ᭱ࡶ㧗ࡃ࡞ࡗ࡚࠸ࡿࠋࡲࡓࠊAl, Nb ῧຍࡢヨᩱ࡟ࡘ࠸࡚ࡣࠊ77.3K ࡟࠾࠸࡚ࡣ pure ヨᩱࡼࡾࡶ㧗࠸
Fig.2 Angular dependence of Jc at 77.3K (0.5T)

Jc ࢆ♧ࡋࡓࠋࡋ࠿ࡋࠊ60K ࡟࠾࠸࡚ࡣ Al, Nb ῧຍࡢヨᩱࡢ Tc ࡣ pure ࡼࡾࡶపࡃ࡞ࡗ࡚࠸ࡿࠋࡇࢀࡣప

࡟࠾࠸࡚

㻌

᭷ຠ࡟స⏝ࡍࡿ㌿఩ࡸ✵㝽࡞࡝ࡢ᪤Ꮡࣆࣥࡀῧຍ≀ࡢᑟཧ⪃ᩥ⊩㻌ධ࡟ࡼࡗ࡚ῶᑡࡋࡓࡓࡵࡔ࡜⪃࠼ࡽࢀࡿࠋࡲࡓ Jc ࡢ☢ሙ

1. A. Matsumoto, H. Kitaguchi, Supercond. Sci.Technol.

ゅᗘ౫Ꮡᛶࢆ Fig.2 ࡟♧ࡍࠋῧຍ≀ࡢᑟධ࡟ࡼࡗ࡚඲యⓗ27 (2014) 1500

̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-a06

Bi 系・鉄系線材

㻭㼓㻙㻿㼚 ྜ㔠⿕そᮦ䛚䜘䜃 㻿㼁㻿㻛㻔㻭㼓㻙㻿㼚㻕஧㔜⿕そᮦ䜢⏝䛔䛯㻌㻼㻵㼀㻙㻔㻮㼍㻘㻷㻕㻲㼑㻞㻭㼟㻞 ⥺ᮦ䛾స〇㻌㻲㼍㼎㼞㼕㼏㼍㼠㼕㼛㼚㻌㼛㼒㻌㻼㻵㼀㻙㻔㻮㼍㻘㻷㻕㻲㼑㻞㻭㼟㻞㻌㼣㼕㼞㼑㼟㻌㼎㼥㻌㼡㼟㼕㼚㼓㻌㻭㼓㻙㻿㼚㻌㼍㼘㼘㼛㼥㻌㼟㼔㼑㼍㼠㼔㻌㼍㼚㼐㻌㻿㼁㻿㻛㻔㻭㼓㻙㻿㼚㻕㻌㼐㼛㼡㼎㼘㼑㻌㼟㼔㼑㼍㼠㼔㻌ᡞྔ㻌 ୍ṇ㻘㻌 㧗㻌 ྊ㡰㻘㻌 ᯇᮏ㻌 ᫂ၿ㻘㻌 ⳥ụ㻌 ❶ᘯ㻘㻌 ⇃಴ᾈ᫂㻌 䠄㻺㻵㻹㻿䠅㻌㼀㻻㻳㻭㻺㻻㻌㻷㼍㼦㼡㼙㼍㼟㼍㻘㻌㻳㻭㻻㻌㼆㼔㼍㼛㼟㼔㼡㼚㻘㻌㻹㻭㼀㻿㼁㻹㻻㼀㻻㻌㻭㼗㼕㼥㼛㼟㼔㼕㻘㻌㻷㻵㻷㼁㻯㻴㻵㻌㻭㼗㼕㼔㼕㼞㼛㻘㻌㻷㼁㻹㻭㻷㼁㻾㻭㻌㻴㼕㼞㼛㼍㼗㼕㻌 䠄㻺㻵㻹㻿䠅㻌㻱㻙㼙㼍㼕㼘㻦㻌㼀㻻㻳㻭㻺㻻㻚㻷㼍㼦㼡㼙㼍㼟㼍㻬㼚㼕㼙㼟㻚㼓㼛㻚㼖㼜㻌㍑䛧䛶♧䛧䛶䛔䜛䚹⌧ᅾ䜎䛷䛻ᚓ䜙䜜䛶䛔䜛᭱㧗䛾 㻶㼏 ್䛿㻝㻚㻠㼤㻝㻜㻡㻭㻛㼏㼙㻞㻔㻠㻚㻞㻌㻷㻘㻌㻝㻜㻌㼀㻕䛷䛒䜛䚹㻌䠍䠊䛿䛨䜑䛻㻌
㕲⣔㉸ఏᑟయࡣ㧗࠸⮫⏺ ᗘ 7F ࡜ᴟࡵ࡚㧗࠸ୖ㒊⮫⏺☢⏺ +F ࢆ᭷ࡍࡿࡓࡵࠊᾮయ࣒࣊ࣜ࢘ࡢࡳ࡞ࡽࡎᾮయ
Ỉ⣲ࠊ෭෾ᶵ෭༷࡞࡝୰ ᗘ࡛ࡢᙉ☢ሙⓎ⏕⏝⥺ᮦ࡜ࡋ࡚ࡢᛂ⏝ࡀᮇᚅࡉࢀ࡚࠸ࡿࠋࡑࡢࡓࡵ 3RZGHULQWXEH
3,7 ἲ࡟ࡼࡿ⥺ᮦ໬◊✲ࡀ⾜ࢃࢀ࡚ࡁ࡚࠸ࡿࡀࠊ᭱㏆ %Dࠊ
6U ࢆᑐ㇟࡟ࡋ࡚☢⏺୰ࠊ. ࡛ $FP ㏆ࡃࡢᐇ⏝ࣞ࣋ࣝࡢ⮫⏺㟁ὶᐦᗘ -F ࡀሗ࿌ࡉࢀࡿࡼ࠺࡟࡞ࡗࡓࠋ ⣔ࡢ⥺ᮦࢆ 3,7 ἲ࡛స〇ࡍࡿሙྜࠊ཯ᛂࡋ࡞࠸⿕そᮦࡣ௒ࡢ࡜ࡇࢁ㖟ࡋ࠿࡞࠸ࡀࠊ⣧㖟ࡣᶵᲔⓗᙉᗘࡀᙅ࠸
࡜࠸࠺ၥ㢟ࡀ࠶ࡿࠋࡇࢀࢆゎỴࡍࡿᡭẁ࡜ࡋ࡚ᡃࠎࡣᶵ
Ეⓗ≉ᛶࡢඃࢀࡓ $J6Q ྜ㔠⿕そᮦ࠶ࡿ࠸ࡣ $J6Q ྜ㔠࡜ 686 ࡜ࢆ⤌ࡳྜࢃࡏࡓ஧㔜⿕そᮦ࡟ࡼࡿ 3,7%D ⥺ᮦࡢ㛤Ⓨࢆ⾜ࡗ࡚࠸ࡿࠋࡇࡇ࡛ࡣྜ㔠໬࡟ࡼࡿ⤌⧊ࡢᨵ
ၿ࡜ࠊ-F ≉ᛶࡢྥୖ࡟ࡘ࠸࡚ሗ࿌ࡍࡿࠋ㻌㻞䠊ᐇ㦂᪉ἲ㻌%D. )H$V ࡢ๓㥑యࡣࠊྛඖ⣲༢యࡢཎᩱࢆ࣮࣑࣎ࣝ
࡛ࣝΰྜࠊ⇕ฎ⌮ࡍࡿࡇ࡜࡟ࡼࡗ࡚స〇ࡋࠊḟ࠸࡛ࡑࡢ⢊ᮎࢆ $J6Q ྜ㔠⟶࡟ࡘࡵ࡚⁁࣮ࣟࣝࠊᅽᘏࠊࣉࣞࢫ࡟
ࡼࡾࢸ࣮ࣉ≧࡟ຍᕤࡋࡓࠋ$J ୰ࡢ 6Q ⃰ᗘࡣ DWࡢ㛫࡛ኚ໬ࡉࡏࡓࠋ$J6Q ྜ㔠ࡣຍᕤ◳໬ࡀ⣧㖟ࡼࡾ኱ࡁ࠸ࡓࡵࠊᚲせ࡟ᛂࡌ࡚୰㛫↝㕌ࢆຍ࠼ࡓࠋ
ࡲࡓࠊ686$J6Q ஧㔜⿕そࢸ࣮ࣉࡣࠊୖグࡢ $J6Q ୍㔜⿕そࢸ࣮ࣉࢆࡉࡽ࡟ 686 ⟶࡟ᤄධࡋ࡚ࠊᅽᘏࠊࣉࣞࢫࢆ
⧞ࡾ㏉ࡍࡇ࡜࡟ࡼࡗ࡚స〇ࡋࡓࠋ᭱⤊⇕ฎ⌮ࡣ º&ࠊ ᫬㛫ࡢ᮲௳࡛⾜ࡗࡓࠋ࡞࠾ࠊẚ㍑ࡢࡓࡵ࡟ $J6Q ྜ㔠ࡢ௦ࢃࡾ࡟㏻ᖖࡢ⣧㖟ࢆ౑ࡗࡓࢸ࣮ࣉࡶస〇ࡋࡓࠋᚓࡽࢀࡓࢸ࣮ࣉ࡟ࡘ࠸࡚ࠊ.ࠊ☢ሙ୰࡛⮫⏺㟁ὶ ,Fࡢ ᐃࢆ⾜࠸ࠊ%D ࢥ࢔㒊ࡢ᩿㠃✚࡛㝖ࡋ࡚ -F ࢆồࡵࡓࠋࡉࡽ࡟ග㢧ほᐹࠊ㉮ᰝ㟁㢧ほᐹࠊ; ⥺ᅇᢡࠊ◳ᗘヨ㦂࡞࡝ࢆᐇ᪋ࡋࠊ$J ⿕そᮦ࡬ࡢ 6Q ῧຍࡢᙳ㡪࡟ࡘ࠸࡚⪃ᐹࡋࡓࠋ㻲㼕㼓㻚㻌㻝㻌㻿㻱㻹㻌㼜㼔㼛㼠㼛㼓㼞㼍㼜㼔㼟㻌㼛㼒㻌㼠㼔㼑㻌㼕㼚㼠㼑㼞㼒㼍㼏㼑㻌㼎㼑㼠㼣㼑㼑㼚㻌㻭㼓㻙㻿㼚㻌㼍㼘㼘㼛㼥㻌㼟㼔㼑㼍㼠㼔㻌 㼍㼚㼐㻌 㻮㼍㻙㻝㻞㻞㻌 㼏㼛㼞㼑㻌 㼛㼎㼟㼑㼞㼢㼑㼐㻌 㼛㼚㻌 㼠㼔㼑㻌 㼜㼛㼘㼕㼟㼔㼑㼐㻌㼘㼛㼚㼓㼕㼠㼡㼐㼕㼚㼍㼘㻌 㼏㼞㼛㼟㼟㻌 㼟㼑㼏㼠㼕㼛㼚㻌 㻔㼍㻘㻌 㼏㻘㻌 㼑㻘㻌 㼓㻕㻌 㼍㼚㼐㻌 㼠㼔㼑㻌 㼓㼞㼍㼕㼚㻌㼟㼠㼞㼡㼏㼠㼡㼞㼑㻌㼛㼒㻌㻮㼍㻙㻝㻞㻞㻌㼏㼛㼞㼑㻌㼛㼎㼟㼑㼞㼢㼑㼐㻌㼛㼚㻌㼠㼔㼑㻌㼒㼞㼍㼏㼠㼡㼞㼑㼐㻌㼏㼞㼛㼟㼟㻌㼟㼑㼏㼠㼕㼛㼚㻌㻔㼎㻘㻌㼐㻘㻌㼒㻘㻌㼔㻕㻌㻟䠊ᐇ㦂⤖ᯝ㻌ᅛ⁐య◳໬䛚䜘䜃ຍᕤ◳໬䛾┦஌ຠᯝ䛻䜘䜚䚸㻭㼓㻙㻿㼚 ྜ㔠䛾◳䛥䛿⣧㖟䜘䜚䜒ⴭ䛧䛟ୖ᪼䛩䜛䚹౛䛘䜀䚸ຍᕤᚋ䛾䝡䝑䜹䞊䝇◳ᗘ㻔㻴㼢㻕䛿䚸⣧㖟䛜 㻣㻢 䛻ᑐ䛧䚸㻣㻚㻡㻑㻿㼚 䛷䛿 㻝㻞㻢 䛻㐩䛩䜛䚹䛣䛾䛯䜑䚸㻮㼍㻙㻝㻞㻞 䝁䜰㒊䛸䛾◳䛥䛾䝬䝑䝏䞁䜾䛜Ⰻ䛟䛺䜚䚸」ྜయ䛸䛧䛶䛾ຍᕤᛶ䛜ᨵၿ䛥䜜䜛䚹䛣䛾䛣䛸䛿䚸㻲㼕㼓㻚㻌 㻝 䛻♧䛧䛯䜘䛖䛻⏺㠃䛜䝇䝮䞊䝈䛻䛺䜛䛣䛸䛛䜙䜒ศ䛛䜛䚹䜎䛯䚸⿕そ㒊䛾◳䛥䛾ୖ᪼䛿䚸䝁䜰㒊䛾㓄ྥᛶ䛾ྥୖ㻔㻲㼕㼓㻚㻌 㻝㻕䛚䜘䜃⦓ᐦ໬䜢䜒䛯䜙䛩䚹䛣䛾䜘䛖䛺ຠᯝ䛿䚸㻿㼁㻿 䛷஧㔜⿕そ䛩䜛䛸䛥䜙䛻㢧ⴭ䛻䛺䜚䚸㠀ᖖ䛻⦓ᐦ䛷୍ᵝ䛺䝁䜰㒊䛜ᚓ䜙䜜䜛䛣䛸䛜ศ䛛䛳䛯䚹㻌
䛣䛾䜘䛖䛺⤌⧊䛾ᨵၿ䛻䜘䛳䛶䚸⣧㖟䛾ሙྜ䜘䜚 㻶㼏 ್䛿䛥䜙䛻ྥୖ䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹㻲㼕㼓㻚㻌㻞㻌 䛿௦⾲ⓗ䛺 㻶㼏㻙㻴 ≉ᛶ䜢ẚ㻲㼕㼓㻚㻌㻞㻌㼀㼥㼜㼕㼏㼍㼘㻌㻶㼏㻙㻴㻌㼏㼡㼞㼢㼑㼟㻌㼛㼒㻌㻭㼓㻙㻿㼚㻌㼍㼘㼘㼛㼥㻌㼟㼕㼚㼓㼘㼑㻌㼟㼔㼑㼍㼠㼔㼑㼐㻌㼍㼚㼐㻌㻿㼁㻿㻛㻭㼓㻙㻿㼚㻌㼐㼛㼡㼎㼘㼑㻌㼟㼔㼑㼍㼠㼔㼑㼐㻌㻮㼍㻙㻝㻞㻞㻌㼠㼍㼜㼑㼟㻚㻌̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-p01

Y 系，MgB2 バルク (1)RE247 ↝⤖యࡢᚤ⣽⤌⧊ࠊ⢏⏺≉ᛶไᚚControls of microstructure and grain boundary characteristics of RE247 sintered bulks㻌ୗᒣ㻌 ῟୍䚸㒔ᡤ㻌 ᜏ㍤㻌 䠄㟷Ꮫ኱㸧䠗㎷ᓅ㻌 ༓㔛䚸Ⲷ㔝㻌 ᣅ䚸ᓊᑿ㻌 ග஧㻌 䠄ᮾ኱㝔ᕤ㸧㻌SHIMOYAMA Jun-ichi, TODOKORO Koki (Aoyama Gakuin Univ.);
TSUJITAKE Senri, OGINO Hiraku, KISHIO Kohji (Univ. of Tokyo)
E-mail: shimo@phys.aoyama.ac.jp㻌㸬ࡣࡌࡵ࡟
RE247 (RE2Ba4Cu7O15-G) ࡣ RE123 (REBa2Cu3O7-G) ࡜
RE124 (REBa2Cu4O8)ࡢ㛫ࡢẚ㍑ⓗ⊃࠸᮲௳࡛ࡋ࠿⏕ᡂࡋ࡞࠸ࡇ࡜ࠊࡲࡓࡑࡢ᮲௳ࡣ୍⯡࡟㓟⣲ศᅽࡀ 1 atm ௨ୖ࡛࠶ࡿࡇ࡜࠿ࡽྜᡂ౛ࡣ RE123 ࡸ RE124 ࡟ẚ࡭࡚ᴟࡵ࡚ᑡ
࡞࠸ࠋࡋ࠿ࡋࠊCuO2 㠃ࠊCuO1-G㙐ࠊCuO ஧㔜㙐ࡢ 3 ✀ࡢᑟ㟁㠃ࡢ✚ᒙᵓ㐀ࢆᣢࡘࡇ࡜࠿ࡽࠊRE247 ࡟ࡣ⯆࿡῝࠸≀ᛶࡢⓎ⌧ࡀᮇᚅ࡛ࡁࡿࠋ
ᡃࠎࡣ᭱㏆ࠊࡇࢀࡲ࡛࡟࡞࠸⡆౽࡞ RE247 ࡢྜᡂἲࢆ
☜❧ࡋࡓࠋࡇࢀ࡟ࡼࡾ RE247 ↝⤖యࡀᐜ᫆࡟ྜᡂ࡛ࡁࡿ
ࡼ࠺࡟࡞ࡾࠊᵝࠎ࡞⣔⤫ⓗ࡞◊✲ࡀྍ⬟࡟࡞ࡗࡓࠋࡉࡽ
࡟ RE247 ࡛ࡣ RE123 ࡸ RE124 ࡜␗࡞ࡾ ab 㠃ࡀᗈ࠸ᖹᯈ
≧ࡢ⤖ᬗࡀᡂ㛗ࡋࡸࡍ࠸ࡇ࡜ࢆぢฟࡋࡓࠋࡇࢀࡣ」㞧࡞✚ᒙᵓ㐀ࢆᣢࡘࡇ࡜࡟㉳ᅉࡋࡓࡶࡢ࡜⪃࠼ࡽࢀࠊc ㍈㓄ྥయస〇࡟ࡣ᭷฼࡞≉ᚩ࡛࠶ࡿ[1]ࠋ௨ୖࡢ⫼ᬒࡢࡶ࡜ࠊᮏ
◊✲࡛ࡣ RE247 ↝⤖యࡢᚤ⣽⤌⧊ࡢไᚚࡸ⢏⏺≉ᛶࡢྥୖࢆ┠ⓗ࡜ࡋࠊྜᡂ᮲௳ࡢ᭱㐺໬ࢆ㐍ࡵࠊࡉࡽ࡟ඖ⣲⨨᥮ࡢྍ⬟ᛶ࡟ࡘ࠸࡚ࡶㄪ࡭࡚࠸ࡿࠋ
㸬ᐇ㦂᪉ἲ
RE247 ↝⤖య䛿 RE2O3 䜎䛯䛿 Pr6O11ࠊBaO2ࠊCuO ࢆฟⓎཎᩱ࡜ࡋࠊRE:Ba:Cu = 2:4:7 ࡢࣔࣝẚ࡟࡞ࡿࡼ࠺࡟⛗㔞ࠊΰྜᚋࠊ↝ᡂࡋ RE123 ࢆ୺┦࡜ࡍࡿ๓㥑యࢆస〇ࡋࡓࠋࡇࡢ๓㥑యࢆ⢊○ᚋࠊ୍㍈ࣉࣞࢫ࡟ࡼࡾ࣌ࣞࢵࢺᡂᆺࡋࠊ
↝⤖ࡋࡓᚋࠊ㓟⣲࢔ࢽ࣮ࣝࢆ 450°C ௨ୗ 250°C ࡲ࡛⾜࠸ࠊ
RE123 ࡢ㓟⣲㔞ࢆ~6.95 ࡜ࡋࡓࠋᚓࡽࢀࡓ RE123 ࡜ CuOࡢΰྜ≀࠿ࡽ࡞ࡿ↝⤖యࢆ࢔࣑ࣝࢼࡢࢱ࣐ࣥࣥ⟶࡟ධࢀࠊ▼ⱥ⟶࡟኱Ẽ୰࡛ᑒධࡋࡓࠋ↝ᡂࡣ 930~1000°C ࡛ 16~32᫬㛫⾜࠸⅔ෆ࡛෭༷ࡋࡓࠋࡉࡽ࡟ᵝࠎ࡞᮲௳࡛࣏ࢫࢺ࢔
ࢽ࣮ࣝࢆ⾜ࡗࡓࠋࡇࡢ᪉ἲ࡛ࡣᑒධࡍࡿ๓㥑యࡢ㔞࡜▼ⱥᑒ⟶ෆࡢ࢞ࢫయ✚ࢆㄪᩚࡍࡿࡇ࡜࡟ࡼࡾࠊ▼ⱥ⟶ෆࡢ㓟⣲ศᅽࡀไᚚ࡛ࡁ RE247 ࡢ⏕ᡂ᮲௳࡟ྜࢃࡏࡿࡇ࡜ࡀ
ᐜ࡛᫆࠶ࡿࠋᚓࡽࢀࡓヨᩱࡢ୍㒊࡟ࡘ࠸࡚ࡣ᭱ᚋ࡟ 250°C
ࡲ࡛㓟⣲࢔ࢽ࣮ࣝࢆ⾜ࡗࡓᚋࠊ⢊○ࡋࠊ࣌ࣞࢵࢺᡂᆺࢆ
⾜࠸෌ࡧ↝⤖ࡋࡓࠋヨᩱࡢᵓᡂ┦ࡣ XRDࠊᚤ⣽⤌⧊ࡣ SEMࠊ☢໬≉ᛶࡣ SQUID ☢᮰ィ࡟ࡼࡾㄪ࡭ࡓࠋ䜎䛯⢏㛫 Jc 䛿ṧ␃☢໬ἲ䛻䜘䜚ㄪ䜉䛯䚹㸬⤖ᯝ࡜⪃ᐹ䛣䜜䜎䛷䛻 RE=Y, Pr, Nd, Dy, Ho䚸Er 䛾 RE247 ↝⤖య䜢䜋䜌༢┦䛷ྜᡂ䛩䜛䛣䛸䛻ᡂຌ䛧䛶䛔䜛䚹䛥䜙䛻 RE 䝃䜲䝖䜈䛾
Ca䚸Ba 䝃䜲䝖䜈䛾 Sr 䛾㒊ศ⨨᥮䜢⾜䛳䛶䜒 RE247 ┦䛜⏕ᡂ䛩䜛䛣䛸䜢☜ㄆ䛧䛶䛔䜛䚹
Fig. 1 䛿 Ba 䝃䜲䝖䛾 20䠂䜢 Sr 䛷⨨᥮䛧䛯௙㎸⤌ᡂ䛷䛒䜛
Y2Ba3.2Sr0.8Cu7O15-G䛾䚸950°C 䛷 24 ᫬㛫↝ᡂ䛧䛯ヨᩱ䛾⢊ᮎ䚸⢊○䛧 1 ㍈䝥䝺䝇(100 MPa)䛧䛯䝨䝺䝑䝖䛾⾲㠃䚸960°C 䛷 36᫬㛫෌↝ᡂ䛧䛯↝⤖య⾲㠃䛾 XRD 䝟䝍䞊䞁䛷䛒䜛䚹⢊ᮎ
XRD 䝟䝍䞊䞁䛛䜙䛿䛣䛾ヨᩱ䛜 Y247 ┦༢┦䛷䛒䜛䛣䛸䛜䜟䛛䜛䚹1 ㍈䝥䝺䝇ᚋ䛾䝨䝺䝑䝖⾲㠃䛾 XRD 䝟䝍䞊䞁䛻䛿ᙉ䛔00l 䝢䞊䜽䛜⌧䜜䚸䛣䜜䛿⾲㠃䛜 c ㍈㓄ྥ䛧䛶䛔䜛䛣䛸䜢ព࿡䛩䜛䚹䛥䜙䛻෌↝⤖䜢⾜䛳䛯ᚋ䛾⾲㠃䜒 c ㍈㓄ྥ䜢⥔ᣢ䛧䛶䛔䜛䚹䛣䛾ヨᩱ䛷䛿෌↝⤖ᚋ䛻 Y123 ┦䛜䜟䛪䛛䛻⏕ᡂ䛧䛯䛜䚸⯆࿡῝䛔䛣䛸䛿䛣䛾┦䜒 c ㍈㓄ྥ䛧䛶䛔䜛䛣䛸䛷䛒䜛䚹

Fig. 1 XRD patterns of powder, surface of uni-axiallypressed pellet and surface of sintered pellet of Sr-doped Y247.

Fig. 2 Secondary electron image of surface of Sr-doped
Y247 after re-sintering at 960°C for 36 h..
Fig. 2 䛻෌↝⤖ᚋ䛾䝨䝺䝑䝖⾲㠃䛾 2 ḟ㟁Ꮚീ䜢♧䛧䛯䜘䛖䛻䚸ᖹᯈ≧䛾⤖ᬗ䛜⾲㠃䜢そ䛳䛶䛔䜛䛣䛸䛜䜟䛛䜛䚹䜎䛯䚸෌↝⤖䛾ຠᯝ䛸䛧䛶䚸ᐦᗘ䛜ྥୖ䛩䜛䛣䛸䜒☜ㄆ䛧䛶䛔䜛䚹௨ୖ䛾⤖ᯝ䛿 RE247 䛾 c ㍈㓄ྥ䜢㏻䛨䛯㧗⮫⏺㟁ὶ≉ᛶᮦᩱ䛾ྍ⬟ᛶ䜢♧၀䛧䛶䛔䜛䚹
RE247 䛾㉸ఏᑟ≉ᛶ䚸ᖖఏᑟ≧ែ䛾᢬ᢠ⋡䛾ᵓᡂඖ⣲䞉⇕ฎ⌮᮲௳䛻ᑐ䛩䜛ኚ໬䛻䛴䛔䛶䛿ᙜ᪥ሗ࿌䛩䜛䚹ཧ⪃ᩥ⊩[1] ୗᒣ䜋䛛䚸Abstracts of CSSJ Conference, vol. 91, p178.

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2015年度秋季低温工学・超電導学会

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Y 系，MgB2 バルク (1)REBa2Cu3Oy ⢏Ꮚ䛾஧㍈☢ሙ㓄ྥ䛻䛚䛡䜛཮ᬗ⤌⧊䛾ᙳ㡪
Effects of twin microstructure on bi-axial magnetic alignment in REBa2Cu3Oy 㻌㻌ᇼ஭㻌 ⁠䠈すᒸᐶᗈ䠈⸨ᒸ⚈ኴ㑻䠈ᅵ஭ಇဢ䠄ி኱䠅㻌
HORII Shigeru, NISHIOKA Tomohiro, FUJIOKA Shotaro, DOI Toshiya (Kyoto Univ.)
E-mail: horii.shigeru.7e@kyoto-u.ac.jp㻌
1䠊䛿䛨䜑䛻
ࣃࢱ࣮ࣥ࠿ࡽ a ㍈࡜ b ㍈ࡢ᏶඲࡞☢Ẽⓗศ㞳ࡣᐇ⌧ࡋ࡚ᕼᅵ㢮(RE)⣔㧗 ㉸ఏᑟయ䛿ᾮయ❅⣲ ᗘ䜢㉸䛘䜛⮫࠾ࡽࡎࠊ(h00)ࣆ࣮ࢡ࡜(0k0)ࣆ࣮ࢡࡢΰᅾࡀㄆࡵࡽࢀࡓࠋ
⏺ ᗘ(Tc ~90 K)䛸☢ሙୗ䛷ඃ䜜䛯⮫⏺㟁ὶ≉ᛶ䜢᭷䛧䚸ᾮࡇࡢ⤖ᯝࡣ Fig. 2 ࡢ 4 ᅇᑐ⛠ᛶࢆࡶࡗࡓᴟᅗᙧ࡜ᐃᛶⓗ࡟య❅⣲䛷෭༷䛩䜛㉸ఏᑟ㏦㟁⥺䜔ᙉ☢ሙⓎ⏕⿦⨨䜈䛾ᛂࡣ▩┪ࡋ࡞࠸ࠋᚑࡗ࡚ࠊ཮ᬗࡀᏑᅾࡋ࡚ࡶ Y123 ⢏Ꮚࡢ୍⏝䛜ᮇᚅ䛥䜜䛶䛔䜛䚹䛧䛛䛧䚸ᐇ⏝໬䛻䛿ᒙ≧ᵓ㐀䛚䜘䜃⢏㒊ࡣ 10 T ࡢᅇ㌿ኚㄪ☢ሙୗ࡛ 2 ㍈⤖ᬗ㓄ྥࡍࡿࠋ㛫ᙅ⤖ྜ䛾ၥ㢟䛛䜙஧㍈⤖ᬗ㓄ྥ䛜ồ䜑䜙䜜䜛䚹
ᙜ᪥䛿䚸RE123 䛷䛾⤖ᯝ䜔䐟䡚䐡䛷䛾䜰䝙䞊䝹䛾㐪䛔䛻☢ሙ㓄ྥ䛿ᐊ 䛷㐺⏝ྍ⬟䛺䜶䝢䝍䜻䝅䞊ᢏ⾡䜢౑䜟䛺䜘䜛㓄ྥᛶ䜈䛾ᙳ㡪䛻䛴䛔䛶䜒ሗ࿌䛩䜛䚹䛔 ᪂ 䛧 䛔 ୕ ㍈ ⤖ ᬗ 㓄 ྥ ἲ [1,2] 䛷 䛒 䜛 䚹 ᐇ ⏝ ㉸ ఏ ᑟ ≀ ㉁ㅰ㎡㻌
REBa2Cu3Oy㻌 (RE123)䛿ᩳ᪉ᬗᵓ㐀䜢᭷䛧䚸㢮⦕ᵓ㐀䜢䜒䛴ᮏ◊✲䛾୍㒊䛿䚸ᮧ⏣Ꮫ⾡᣺⯆㈈ᅋ䛚䜘䜃᪥ᮏᯈ◪Ꮚᕤ㧗 ㉸ఏᑟయ䛾⤖ᯝ[2]䛛䜙 RE123 䛻䛚䛔䛶䜒୕㍈⤖ᬗ☢ẼᏛຓᡂ఍䛾ຓᡂ䜢ཷ䛡䛶ᐇ᪋䛧䛯䜒䛾䛷䛒䜛䚹␗᪉ᛶ䛜Ꮡᅾ䛩䜛ྍ⬟ᛶ䛜䛒䜛䛾䛷䚸ᙉ☢ሙ⎔ቃ䜢฼⏝䛧㻌䛯☢ሙ㓄ྥ䛻䜘䛳䛶 RE123 䛾஧㍈⤖ᬗ㓄ྥ䛜ᮇᚅ䛷䛝䜛䜘䛖ཧ⪃ᩥ⊩㻌䛻ぢ䛘䜛䚹䛧䛛䛧䚸RE123 䛷䛿㓟⣲㔞 y 䛾ቑຍ䛻క䛖ṇ᪉ᬗ1. Kimura et al., Langmuir 22 (2006) 3464.
ᩳ᪉ᬗ㌿⛣䛻䜘䜚ᑟධ䛥䜜䜛⤖ᬗ⢏ෆ䛾཮ᬗ⤌⧊䛾䛯䜑䚸⤖
2. Fukushima, Horii et al., Appl. Phys. Exp. 1 (2008) 111701.
ᬗ⢏䝺䝧䝹䛷䛾୕㍈☢Ẽ␗᪉ᛶ䛜పୗ䞉ᾘኻ䛧☢ሙ䜢⏝䛔
3. ᇼ஭䜙䚸H27 ᖺ᫓Ꮨప ᕤᏛ䞉㉸㟁ᑟᏛ఍ 3C-a01.
䛯஧㍈⤖ᬗ㓄ྥ䛜ᅔ㞴䛷䛒䜛䛸⪃䛘䜙䜜䜛䚹ᐇ㝿䛾䛸䛣䜝䚸10
4. Ishihara, Horii et al., Appl. Phys. Exp. 1 (2008) 031701.
T 䛾㛫Ḟᅇ㌿☢ሙ୰䛷 RE123 ┦䛿஧㍈⤖ᬗ㓄ྥ䛩䜛[3]䚹ᐃ
5. Horii et al., J. Appl. Phys. 115 (2014) 113908.
ᛶⓗ䛻䛿䚸཮ᬗ⤌⧊䛾ᙧᡂ䛻䜘䛳䛶⤖ᬗ⢏ෆ䛻ᑟධ䛥䜜䜛䠎✀㢮䛾䝗䝯䜲䞁Ꮡᅾẚ䛾୙ᆒ໬䛻䜘䜛䜒䛾䛸⪃䛘䜙䜜䜛䛜䚸䜘䛟䜟䛛䛳䛶䛔䛺䛔䚹
ᮏ◊✲䛷䛿䚸☢ሙ㓄ྥἲ࡟ࡼࡿ RE123 ࡢ஧㍈⤖ᬗ㓄ྥࡢ㧗ᗘ໬ࢆ┠ⓗ࡜ࡍࡿࠋࡑࡇ࡛ࠊ➨୍☢໬ᐜ᫆㍈ࡢ⤖ᬗ᪉఩ࡸ c ㍈☢Ẽ␗᪉ᛶ[4,5]ࡢ኱ᑠ㛵ಀࡀ␗࡞ࡿ RE123(RE=Y, Nd, Sm, Dy, Er)࡟ࡘ࠸࡚ࠊᵝࠎ࡞᮲௳࡛㓟⣲࢔ࢽ࣮ࣝࡋࡓ RE123 ⢊ᮎࢆ㛫Ḟᅇ㌿☢ሙୗ࡛㓄ྥࡉࡏࠊ☢ሙ㓄ྥᣲືࢆㄪ࡭ࡓࠋ
㻌
2䠊ᐇ㦂᪉ἲ
㏻ᖖࡢᅛ┦཯ᛂἲࢆ⏝࠸࡚ࠊREBa2Cu3Oy (RE=Y, Nd,
Fig.1 Experimental configuration in a modulated
Sm, Dy, Er)ࢆྜᡂࡋࡓࠋ࡞࠾ࠊᮏ↝ᡂࡣᅽ⢊ᡂᆺࡋࡓࡢࡕ
rotation magnetic field (MRF).
⾜࠸ࠊ↝ᡂ ᗘࡶ RE ✀࡟౫Ꮡࡋࡓໟᬗ ᗘࢆ⪃៖ࡋࡓࠋᚓࡽࢀࡓ RE123 ↝⤖య࡟ࡘ࠸࡚ࠊձ✵Ẽ୰࡛ࡢ⅔෭ᚋ O2
㻥㻜Ẽὶ୰ 400°C ࡛࢔ࢽ࣮ࣝಖᣢࠊղAr Ẽὶ୰ 700°C ࡛ࡢಖ㻝㻞㻜㻢㻜ᣢᚋᛴ෭ࡋ O2 Ẽὶ୰ 450°C ࡛ಖᣢࠊճ✵Ẽ୰࡛ࡢ⅔෭ᚋ㻢㻜
O2 Ẽὶ୰ 800°C ࠿ࡽᚎ෭ࠊࡢ㸱✀㢮ࡢ㓟⣲࢔ࢽ࣮ࣝࢆ⾜
㻝㻡㻜
㻟㻜
㻠㻜
ࡗࡓࠋࡇࢀࡽࢆங㖊࡛⢊○ࡋࠊ⢊ᮎ㸸࢚࣏࢟ࢩᶞ⬡㸻1㸸
10 ࡢ㔜㔞ẚ࡛ΰྜࡋࠊヨᩱᅇ㌿᪉ᘧࡢ㛫Ḟᅇ㌿☢ሙ( Fig.
㻞㻜
1 ཧ↷)ୗ࡛ࠊᐊ ࡟࡚㓄ྥࡉࡏࡓࠋᚓࡽࢀࡓ⢊ᮎ㓄ྥయ㻜㻜 㻝㻤㻜ࡢDࠊEࠊJྛ㠃ࡢ X ⥺ᅇᢡ(XRD)ࣃࢱ࣮ࣥ࠿ࡽ☢໬㍈ࢆࠊ
ࣟࢵ࢟ࣥࢢ࣮࢝ࣈ࠾ࡼࡧᴟᅗᙧ[(103), (005)]࠿ࡽ㓄ྥ≧㻞㻜ែࢆ᫂ࡽ࠿࡟ࡋࡓࠋ
㻠㻜
㻞㻝㻜
㻟㻟㻜
㻌
3䠊⤖ᯝ䛚䜘䜃⪃ᐹ㻌
㻢㻜
㻞㻠㻜
㻟㻜㻜
ᅗ 2 ࡟ࠊ10 T ࡢ㛫Ḟᅇ㌿☢ሙୗ࡛㓄ྥࡉࡏࡓ Y123 ⢊ᮎ㻞㻣㻜㓄ྥయࡢ(103) 㠃ࡢᴟᅗᙧࢆ♧ࡍࠋ࡞࠾ࠊY123 ⢊ᮎࡣࣉࣟࢭࢫձ࡛ࡢ㓟⣲࢔ࢽ࣮ࣝࢆ⤒ࡓࡶࡢ࡛࠶ࡾࠊᅗ 2 ࡢᴟᅗᙧࡣ c ㍈ࡀ㓄ྥࡋ࡚࠸ࡿD㠃࡛ࡢ ᐃ࡛ᚓࡽࢀࡓ⤖ᯝ࡛࠶
Fig.2 (103) pole figure at D plane for Y123 powder sampleࡿࠋ᫂░࡞ 4 ᅇᑐ⛠ᛶࡢࢫ࣏ࢵࢺࡀᚓࡽࢀࠊ2 ㍈㓄ྥࡋ࡚aligned under a MRF of 10 T.
࠸ࡿࡇ࡜ࡀࢃ࠿ࡿࠋࡋ࠿ࡋࠊ཮ᬗ⤌⧊ࢆᙧᡂࡏࡎ Y123 ┦ࡼࡾࡶᩳ᪉ᬗᛶࡢప࠸ Y2Ba4Cu7Oy (Y247)⢊ᮎ㓄ྥయࡢ(0113) 㠃ࡢᴟᅗᙧ[2]ࡀ 2 ᅇᑐ⛠ᛶࢆ♧ࡋࡓࡇ࡜࠿ࡽࠊᅗ 2ࡢ 4 ᅇᑐ⛠ᛶࡣ཮ᬗ⤌⧊ࡢᙧᡂ࡟క࠺⤖ᬗ⢏ෆ࡟Ꮡᅾࡍ
ࡿ 2 ✀㢮ࡢࢻ࣓࢖ࣥ࡟ࡼࡿᅇᢡࡢ⤖ᯝ࡛࠶ࡿ࡜⌮ゎ࡛ࡁࡿࠋࡲࡓࠊCuO2 㠃ෆ(a,b ㍈)᪉ྥࡀ㓄ྥࡍࡿE, J 㠃ࡢ XRD̿̿

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2015年度秋季低温工学・超電導学会

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Y 系，MgB2 バルク (1)㻾㻱 ΰྜ 㻾㻱㻮㻯㻻 ⁐⼥จᅛ䝞䝹䜽䛻䛚䛡䜛 㻾㻱㻞㻝㻝 ᯒฟ≀䛾䝃䜲䝈䛾ỴᐃᅉᏊ㻌㻰㼑㼠㼑㼞㼙㼕㼚㼍㼚㼠㼟㻌㼛㼒㻌㼟㼕㼦㼑㻌㼛㼒㻌㻾㻱㻞㻝㻝㻌㼜㼞㼑㼏㼕㼜㼕㼠㼍㼠㼑㼟㻌㼕㼚㻌㻾㻱㻙㼙㼕㼤㼑㼐㻌㻾㻱㻮㻯㻻㻌㼙㼑㼘㼠㻙㼟㼛㼘㼕㼐㼕㼒㼕㼑㼐㻌㼎㼡㼘㼗㼟㻌℩ᡞᒣ ⤖⾰, Ⲷ㔝 ᣅ, ᓊᑿ ග஧ 䠄ᮾ኱㝔ᕤ䠅䠗ୗᒣ ῟୍ 䠄㟷Ꮫ኱䠅SETOYAMA Yui, OGINO Hiraku, KISHIO Kohji (The University of Tokyo); SHIMOYAMA Jun-ichi (Aoyama Gakuin Univ.)
E-mail: 6071721904@mail.ecc.u-tokyo.ac.jp㻌ࡼࡾࡶ(Dy,Gd)BCO ࡢ᪉ࡀඛ࡟ศゎ཯ᛂࡀ㉳ࡁࡓࡇ࡜ࡀ
㻝䠊⥴ゝ㻌ண᝿࡛ࡁࡿࠋRE211 ┦⢏Ꮚࡣ㒊ศ⁐⼥≧ែ࡛ࡣᾮ┦ࢆ௓
REBa2Cu3Oy (REBCO, RE123)⁐⼥จᅛ䝞䝹䜽䛾ᤕᤊ☢ሙࡋ Ostwald ᡂ㛗ࡍࡿࡓࡵ[5]ࠊ(Dy,Gd)BCO ࡛ࡣ RE211 ┦䜔⮫⏺㟁ὶᐦᗘJc䛾≉ᛶᨵၿ䛻䛿䚸☢᮰䝢䞁䝙䞁䜾䝉䞁䝍䞊ࡢᡂ㛗ࡀ㐍⾜ࡋ⢒኱໬ࡀ㐍ࢇࡔྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࠋࡇ
䛾ศᕸ䜔䝃䜲䝈䛾ไᚚ䛻䜘䜛䝢䞁Ṇ䜑ຊྥୖ䛜㔜せ䛸䛺䜛䚹ࡢࡇ࡜࠿ࡽࠊᮏ◊✲ࡢࡼ࠺࡟ึᮇࡢ RE123 ┦࡜ RE211 ┦RE123㉸ఏᑟẕ┦䛻ศᩓ䛧䛯RE2BaCuO5 (RE211)ᖖఏᑟᯒ
࡛ RE ඖ⣲ࢆኚ࠼࡚ REBCO ⁐⼥จᅛࣂࣝࢡࢆస〇ࡍࡿሙฟ≀䛿ẕ┦䛸䛾⏺㠃䛜ప☢ሙୗ䛻䛚䛔䛶䝢䞁䝙䞁䜾䝉䞁䝍䞊ྜࡣࠊ㒊ศ⁐⼥ ᗘࡀ㧗࠸ RE ඖ⣲ࢆึᮇࡢ RE123 ┦࡟䛸䛧䛶䛿䛯䜙䛟䛯䜑䚸ᚤ⣽໬䛧䛶⏺㠃ᐦᗘ䜢ቑຍ䛥䛫䜛䛣䛸䛜⏝࠸ࡿ࡜ࠊ᭱⤊⤌⧊ࡢ RE211 ᯒฟ≀ࡢ⢒኱໬ࡀᢚไ࡛ࡁ
䝢䞁Ṇ䜑ຊྥୖ䛻䛴䛺䛜䜛䚹䛭䛾䛯䜑Ptῧຍ䛻䜘䜛RE211ᯒ
ࡿࡇ࡜ࡀ♧၀ࡉࢀࡿࠋ
ฟ≀䛾ᡂ㛗ᢚไ[1]䜔䝪䞊䝹䝭䝹䛻䜘䜛ึᮇ䛾RE211┦⢊ᮎ䜎䛯䚸䛣䜜䜙䛾⁐⼥ᛴ෭ヨᩱ䛾ᒁᡤ⤌ᡂ䜢ศᯒ䛧䛯䛸䛣䜝䚸䛾ᚤ⣽໬[2]䛺䛹䛜䛣䜜䜎䛷◊✲䛥䜜䛶䛝䛯䚹(Gd,Dy)BCO 䛷䛿䚸୰ᚰ䛜 Dy-rich 䛷࿘㎶䛜 Gd-rich 䛾୍᪉䚸ᡃ䚻䛿」ᩘ䛾REඖ⣲䜢⏝䛔䛶స〇䛧䛯REΰྜ
RE211 ┦⢏Ꮚ䛜ከ䛟ほᐹ䛥䜜䛯䚹䛣䜜䛿⇕ฎ⌮୰䛻ึᮇ䛾
REBCO䝞䝹䜽䛾㉸ఏᑟ≉ᛶ䛻䛴䛔䛶䛣䜜䜎䛷ሗ࿌䛧䛶䛝䛯
Gd123 ┦䛜ศゎ䛧䛶 Gd211 ┦䛻ኚ໬䛩䜛㝿䚸ึᮇ䛾 Dy211[3]䚹௒ᅇ䛿REΰྜ䝞䝹䜽ෆ䛾᭱⤊⤌⧊䛾RE211ᯒฟ≀䛾䝃┦⢏Ꮚ䜢そ䛖䜘䛖䛻ᙧᡂ䛥䜜䜛䛯䜑䛷䛒䜛䛸⪃䛘䜙䜜䜛䚹䛧䛛䛧
䜲䝈䛸REඖ⣲䛾⤌䜏ྜ䜟䛫䛾㛵ಀ䜢ㄪ䜉䛯⤖ᯝ䜢ሗ࿌䛩
(Dy,Gd)BCO 䛻䛚䛔䛶䜒䚸㛗ᚄ 5 Pm ௨ୖ䛻ᡂ㛗䛧䛯 RE211䜛䚹㻌ᯒฟ≀䛿 Dy211 䜢᰾䛸䛧䛶䛔䛯䚹ศゎ཯ᛂ䛷᪂䛯䛻⏕䛨䛯㻞䠊ᐇ㦂᪉ἲ㻌
Dy211 ┦䛜ึᮇ䛾 Gd211 ┦䜢⧅䛢䛯ྍ⬟ᛶ䜔䚸㒊ศ⁐⼥≧
RE2O3 (RE = Gd 䜒䛧䛟䛿 Dy), BaCO3, CuO 䛾ཎᩱ⢊䜢ΰྜែ䛻䛚䛔䛶 RE 䛾⛣ື䛜㉳䛣䛳䛯ྍ⬟ᛶ䛜⪃䛘䜙䜜䜛䚹 ᗘ
䛧䚸RE’123 ⢊ᮎ䛸 RE’’211 ⢊ᮎ䜢ᅛ┦཯ᛂἲ䛻䜘䜚ྜᡂ䛧䛯䚹䜔ಖᣢ᫬㛫䜢ኚ䛘䛯⁐⼥ᛴ෭ヨᩱ䛾ᒁᡤ⤌ᡂศᯒ⤖ᯝ䜒ሗ䛣䜜䜙䜢 RE’123 䠖 RE’’211 = 7 䠖 3 (䝰䝹ẚ) + 0.5 wt% Pt 䛸࿌䛩䜛䚹䛺 䜛 䜘 䛖 䛻 ΰ ྜ 䛧 10 mmI 䛻 ᡂ ᆺ 䛧 䛯 ๓ 㥑య 䛛 䜙 ✀ ⤖ ᬗ(Nd123 ༢ ⤖ ᬗ ) 䜢 ⏝ 䛔 䛶 ⫱ ᡂ 䛧 䛯 ⁐ ⼥ ᡂ 㛗 ヨ ᩱ 䜢ཧ⪃ᩥ⊩㻌(RE’,RE’’)BCO 䛸⾲グ䛩䜛䚹䜎䛯䚸㒊ศ⁐⼥≧ែ䛻䛚䛡䜛 RE[1] N. Ogawa et al., Physica C 177 101–105.
ศᕸ䜢ホ౯䛩䜛䛯䜑䚸⇕ฎ⌮㐣⛬䛾᭱㧗 ᗘ䛛䜙ᛴ෭䛧䛯
[2] S. Nariki et al., Physica C 439 62–66.
[3] Y. Setoyama et al., Supercond. Sci. Technol. 28 (2015)
ヨᩱ䜒స〇䛧䛯(⁐⼥ᛴ෭ヨᩱ)䚹䛺䛚䚸䛣䛾ヨᩱ䛻䛿 Pt 䜢ῧ015014.
ຍ䛧䛶䛚䜙䛪䚸᭱㧗 ᗘ䜎䛷䛾᪼ 䛿 1 h 䛷⾜䛳䛯䚹ᚓ䜙䜜䛯
[4]
M.
Muralidhar et al., Supercond. Sci. Technol. 10 (1999)
ヨᩱ䜢ษ䜚ฟ䛧䚸ab ◊☻㠃䛻䛴䛔䛶 SEM/EDX 䜔 EPMA 䛻䜘
663–670.
䜚ᚤ⣽⤌⧊ほᐹ䛚䜘䜃ᒁᡤ⤌ᡂศᯒ䜢⾜䛳䛯䚹[5] T. Izumi et al., J. Mater. Res. 7 (1992) 801–807.
㻌㻟䠊⤖ᯝ䛸⪃ᐹ㻌
(Gd,Dy)BCO 䛸(Dy,Gd)BCO 䛾⁐⼥ᡂ㛗ヨᩱ䛾 ab ◊☻㠃䛾஧ḟ㟁Ꮚീ䜢 Fig. 1 䛻♧䛩䚹䛣䜜䜙䛾ほᐹ䛿䚸䛔䛪䜜䛾ヨᩱ䛷䜒ྠ䛨఩⨨(a-growth 㡿ᇦ䚸⾲㠃䛛䜙✀⤖ᬗ┤ୗ᪉ྥ䛻
1 mm䚸✀⤖ᬗ䛛䜙ືᚄ᪉ྥ䛻 2 mm)䛛䜙ษ䜚ฟ䛧䛯ヨᩱ∦䜢⏝䛔䛯䚹⃰䛔⅊Ⰽ䛾㡿ᇦ䛜 RE123 ẕ┦䚸ⓑ䛔㡿ᇦ䛜 RE211
ᯒฟ≀䛷䛒䜛䛜䚸(Dy,Gd)BCO 䛷䛿㛗ᚄ 5 Pm ௨ୖ䛻ᡂ㛗䛧⢒኱໬䛧䛯 RE211 ᯒฟ≀䜒ほᐹ䛥䜜䛯䚹
Fig. 2 䛻䛿䚸(Gd,Dy)BCO 䛸(Dy,Gd)BCO 䛾⁐⼥ᛴ෭ヨᩱ䛾◊☻㠃䛾஧ḟ㟁Ꮚീ䜢♧䛩䚹(Gd,Dy)BCO 䛿 1060°C䚸
(Dy,Gd)BCO 䛿 1055°C (䛭䜜䛮䜜⁐⼥ᡂ㛗ヨᩱ䜢⫱ᡂ䛩䜛㝿䛾⇕ฎ⌮䛾᭱㧗 ᗘ䛻ᑐᛂ)䛷 1 h ಖᣢ䛧䛯ᚋ䛻㟁Ẽ⅔䛛
䜙ྲྀ䜚ฟ䛧㖡ᯈୖ䛷ᛴ෭䛧䛯ヨᩱ䛷䛒䜛䚹RE123 ┦䛿㒊ศ⁐⼥≧ែ䛻䛚䛔䛶䛂2 RE123 䊻 RE211 + ᾮ┦ + 㓟⣲䛃䛸ศゎ䛩䜛䛯䜑䚸Fig. 2 䛻䛚䛔䛶䛿⃰䛔⅊Ⰽ䛾㡿ᇦ䛜㒊ศ⁐⼥≧ែ䛻䛚䛡䜛ᾮ┦(Ba-Cu-O ⣔)䛾㡿ᇦ䚸ⓑ䛔㡿ᇦ䛜 RE211 ┦䛷䛒䜛䚹(Dy,Gd)BCO 䛾᪉䛜(Gd,Dy)BCO 䜘䜚䜒⢒኱䛺 RE211┦䛜㢧ⴭ䛻ぢ䜙䜜䛯䚹䛣䛾䛣䛸䜘䜚᭱⤊⤌⧊䛻䛚䛡䜛 RE211
ᯒฟ㒊䛾኱ᑠ㛵ಀ䛿䚸㒊ศ⁐⼥≧ែ䛻䛚䛔䛶᪤䛻Ỵᐃ䛥䜜䛶䛔䜛䛣䛸䛜♧၀䛥䜜䜛䚹 (Dy,Y)BCO 䜔(Dy,Er)BCO 䛾⁐⼥ᡂ㛗/ᛴ෭ヨᩱ䛾స〇䞉ホ౯䛛䜙䜒ྠᵝ䛾ഴྥ䛜ㄆ䜑䜙䜜䛯䚹RE123 ┦䛜 RE211 ┦䛸ᾮ┦䛻ศゎ䛧䛯䜚䚸ᾮ┦䛸 RE211┦䛛䜙 RE123 ┦䜈䛾ໟᬗ཯ᛂ䛜㛤ጞ䛧䛯䜚䛩䜛 ᗘ䛿 RE ඖ⣲ 䛾 䜲 䜸 䞁 ༙ ᚄ 䛜 ቑ ຍ 䛩 䜛 䜋 䛹 㧗 䛔 䚹 ౛ 䛘 䜀 Gd123 䛿
1030°C䚸Dy123 䛿 1010°C ࡛࠶ࡿ[4]ࠋࡑࡢࡓࡵࠊᮏ◊✲࡛ࡣ⇕ฎ⌮ࡢ᭱㧗 ᗘࡲ࡛ࡢ᪼ 㐣⛬࡟࠾࠸࡚(Gd,Dy)BCO(a) (Gd,Dy)BCO(b) (Dy,Gd)BCO

Fig. 1 Secondary electron images of polished ab-surfaces ofmelt-textured bulks, (a) (Gd,Dy)BCO and (b) (Dy,Gd)BCO.

(a) (Gd,Dy)BCO(b) (Dy,Gd)BCO

Fig. 2 Secondary electron images of polished surfaces ofmelt-quenched bulks, (a) (Gd,Dy)BCO and (b) (Dy,Gd)BCO.

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2015年度秋季低温工学・超電導学会

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Y 系，MgB2 バルク (1)ᕼⷧ୙⣧≀ῧຍ 㼅㻝㻞㻟 ⁐⼥จᅛ䝞䝹䜽䛾኱ᆺ໬㻌㻲㼍㼎㼞㼕㼏㼍㼠㼕㼛㼚㻌㼛㼒㻌㼘㼍㼞㼓㼑㻌㼅㻝㻞㻟㻌㼙㼑㼘㼠㻙㼟㼛㼘㼕㼐㼕㼒㼕㼑㼐㻌㼎㼡㼘㼗㼟㻌㼏㼛㼚㼠㼍㼕㼚㼕㼚㼓㻌㼘㼛㼣㻌㼘㼑㼢㼑㼘㻌㼕㼙㼜㼡㼞㼕㼠㼕㼑㼟㻌㻌ᯇᮏ㻌 ࿴ஓ㻘㻌 ℩ᡞᒣ㻌 ⤖⾰㻘㻌 Ⲷ㔝㻌 ᣅ㻘㻌 ᓊᑿ㻌 ග஧㻌 㻔ᮾ኱㝔ᕤ㻕㻧㻌 బ⸨㻌 ᕦᮃ㻘㻌 ୗᒣ㻌 ῟୍㻌 㻔㟷Ꮫ኱㻕㻌
MATSUMOTO Kazuya, SETOYAMA Yui, OGINO Hiraku, KISHIO Kohji (Univ. of Tokyo);
SATO Takumi, SHIMOYAMA Jun-ichi (Aoyama gakuin Univ.)
E-mail: 9918217367@mail.ecc.u-tokyo.ac.jp
㻌
㻌
ཧ⪃ᩥ⊩㻌
䠍䠊䛿䛨䜑䛻㻌
[1] Y. Ishii et al., IEEE Trans. Appl. Supercond.,19 (2009)
REBa2Cu3Oy(RE123)⁐⼥จᅛ䝞䝹䜽䜢ᙉຊ䛺㉸ఏᑟ☢▼
3487-3490.
䛸䛧䛶ᛂ⏝䛩䜛ሙྜ䛻䛿ᾮయ❅⣲ ᗘ䜘䜚ప 䛷䛾㐠㌿䛜᝿[2] S. Yamaki et al., Abstracts of CSSJ Conference 89 (2014)ᐃ䛥䜜䜛䛜䚸䛣䜜䜎䛷䛾◊✲䛷䛿୺䛻 77 K 䛻䛚䛔䛶 Jc 䛾᭱㐺
p.173.
໬䛜⾜䜟䜜䛶䛝䛯䚹77 K 䛷᭱䜒Ⰻ䛔≉ᛶ䜢♧䛩᮲௳䛜䚸ప䛷䜒᭱䜒Ⰻ䛔≉ᛶ䜢♧䛩᮲௳䛸୍⮴䛩䜛䛸䛿㝈䜙䛺䛔䛯䜑[1]䚸
RE123 䝞䝹䜽䛾⏝㏵ᣑ኱䜔ᶵ⬟ྥୖ䛻䛿䚸20~60 K 䛾 ᗘᇦ䛷䛾 Jc 䛾ᨵၿ䛜ᚲせ䛷䛒䜛䚹䛣䜜䜎䛷䛻ᡃ䚻䛿䚸Ba 䝃䜲䝖
䜈䛾 RE 䛾㒊ศ⨨᥮䛜䛒䜛⛬ᗘ㐍䜐䛸䚸ప 䛷䛾 Jc 䛾ୖ᪼䛜ᢚไ䛥䜜䜛䛣䛸䜢ᣦ᦬䛧䛶䛝䛯䚹䜎䛯䚸ప ᅛ┦཯ᛂ䛻䜘䜚ྜᡂ䛧䛯 Y123 䛸 Y211 䜢⏝䛔䛶స〇䛧䛯 10 mmI䛾 Ga ῧຍ䚸
Pt ↓ῧຍ䝞䝹䜽䛜䚸40 K 䛷䛿䚸10 T 䜎䛷 5×105 A cm-2 ௨ୖ䛾 Jc 䜢♧䛩䛣䛸䜢ぢฟ䛧䛶䛔䜛[2]䚹䛣䛾≉ᛶ䛿ᙉຊ䝞䝹䜽☢
▼㛤Ⓨ䛾ᙉ䛔ືᶵ䛻䛺䜛䜒䛾䛷䛒䜛䛜䚸䜎䛪䚸኱ᆺ䝞䝹䜽䛻㐺䛩䜛ᡭἲ䛷䛒䜛䛣䛸䜢᫂䜙䛛䛻䛧䛺䛡䜜䜀䛺䜙䛺䛔䚹௨ୖ䛾⫼ᬒ䛾䜒䛸䚸ᮏ◊✲䛷䛿䚸Ga ᚤ㔞䝗䞊䝥䚸Pt ↓ῧຍ䛾 Y123
⁐⼥จᅛ䝞䝹䜽䛾኱ᆺ໬䜢ヨ䜏䚸䝞䝹䜽ෆ䛾ᵝ䚻䛺㒊ศ䛾ᚤ⣽⤌⧊䚸㉸ఏᑟ≉ᛶ䜢⣔⤫ⓗ䛻ㄪ䜉䛯䚹㻌䠎䠊ᐇ㦂᪉ἲ㻌⁐⼥จᅛ䝞䝹䜽䛾ཎᩱ⢊ᮎ䛻䛿 Y123 䛸 Y211 䜢ప ᅛ┦཯ᛂ䛻䜘䜚ྠ᫬⏕ᡂ䛥䛫䛯䜒䛾䜢⏝䛔䛯䚹ලయⓗ䛻䛿䚸Y123
䛸 Y211 䜢䝰䝹ẚ䛷 7 : 3 䛸䛧䚸Y123 䛾 CuO 㙐䛾 Cu 䛻ᑐ䛧Ga 䜢 0.5%䝗䞊䝥䛩䜛䛯䜑䚸ฟⓎཎᩱ䜢䝰䝹ẚ䛷 Y2O3 :BaO2 : CuO : Ga2O3 = 13 : 34 : 47.93 : 0.035 䛸䛧䛯䚹䛣䜜䜙䜢
Fig. 1 Temperature dependences of ZFC magnetization⛗㔞䚸ΰྜᚋ 1% O2 / Ar Ẽὶ୰䚸800°C 䛷 24 h ↝ᡂ䛧䛯䚹ᚓfor small pieces cut from various positions of a Pt-freeand Ga-doped Y123 melt-solidified bulk.
䜙䜜䛯ཎᩱ⢊ᮎ䛻 Ag2O 䜢 10 wt%ຍ䛘䚸୍㍈䝥䝺䝇(100MPa)䛻䜘䜚 20 mmI× 15 mmt 䛾䝨䝺䝑䝖䛻ᡂᆺ䛧䚸Nd123 ༢⤖ᬗ䜢✀⤖ᬗ䛸䛧䛶ᗏ㠃ຍ⇕᪉ᘧ䛾㟁Ẽ⅔䛻䛶✵Ẽ୰䛷⁐⼥จᅛ䜢⾜䛳䛯䚹స〇䛧䛯⁐⼥จᅛ䝞䝹䜽䛛䜙ᑠ∦䜢ษ䜚ฟ䛧䚸ᡤᐃ䛾 ᗘ䛻䛶 100 h ௨ୖ䛾㓟⣲䜰䝙䞊䝹䜢⾜䛳䛯ᚋ䚸
SQUID ☢᮰ィ䛻䜘䜛☢໬ ᐃ䛻䜘䜚㉸ఏᑟ≉ᛶ䜢ホ౯䛧䚸㉮ᰝᆺ㟁Ꮚ㢧ᚤ㙾䛻䜘䜚ᚤ⣽⤌⧊䜢ほᐹ䛧䛯䚹㻌䠏䠊⤖ᯝ䛸⪃ᐹ㻌⁐⼥จᅛ䛾 ᗘ䝟䝍䞊䞁䛾᭱㐺໬䛻䜘䜚䚸䝅䞁䜾䝹䝗䝯䜲䞁䛛䜙ᡂ䜛䝞䝹䜽䛾⫱ᡂ䛻ᡂຌ䛧䛯䚹ᚓ䜙䜜䛯䝞䝹䜽䛿཰⦰䛧⣙
17 mmI䛷䛒䛳䛯䚹䝞䝹䜽䛾ᵝ䚻䛺㒊ศ䛛䜙ษ䜚ฟ䛧䛯ヨᩱ䛾
ZFC ☢໬⋡䛾 ᗘ౫Ꮡᛶ䜢 Fig. 1 䛻♧䛩䚹䛺䛚䚸✀⤖ᬗ䛛䜙ືᚄ᪉ྥ䛾㊥㞳䜢 La䚸ୗ᪉䜈䛾㊥㞳䜢 Lc 䛸䛧䛶䛔䜛䚹䛔䛪䜜䛾ヨᩱ䜒 Tc~91 K 䛷䛒䜚 Tc 䛾Ⅼ䛷䛿䜋䜌ᆒ୍䛷䛒䜛䛣䛸䛜䜟䛛
䛳䛯䚹40 K 䛻䛚䛡䜛 Jc 䛾☢ሙ౫Ꮡᛶ䜢 Fig. 2 䛻♧䛩䚹✀⤖ᬗ┤ୗ䛾 Lc=2 mm 䛾㡿ᇦ䛷䛿 40 K, 3 T 䛻䛚䛔䛶 Jc~5.0×105 A
cm-2 䛸䚸ྠᵝ䛾〇ἲ䛻䜘䜛 10 mmI䛾䝞䝹䜽䛾 c-growth 㡿ᇦ䛻䛚䛡䜛್[2]䛻㏆䛔㧗䛔್䛷䛒䛳䛯䛜䚸a-growth 㡿ᇦ䛚䜘䜃
Lc=6 mm 䛾㒊ศ䛷䛿 Jc~2×105 A cm-2 ⛬ᗘ䛻䛸䛹䜎䛳䛶䛚䜚䚸䝞䝹䜽୰䛷䛾 Jc 䛾୙ᆒ୍ᛶ䛜኱䛝䛔䛣䛸䛜䜟䛛䛳䛯䚹
Fig. 2 Magnetic field dependence of Jc at 40 K for small
ㅮ₇䛷䛿䚸㓟⣲㔞ไᚚ䛾ຠᯝ䜔䚸䝞䝹䜽ྛᡤ䛾ᚤ⣽⤌⧊䛸
pieces cut from various positions of a Pt-free and⮫⏺㟁ὶ≉ᛶ䛾㛵ಀ䛻䛴䛔䛶㆟ㄽ䛩䜛ணᐃ䛷䛒䜛䚹Ga-doped Y123 melt-solidified bulk.㻌

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Y 系，MgB2 バルク (1)㻿㻼㻿 ἲ䛷స〇䛧䛯 㻹㼓㻮㻞 ㉸㟁ᑟ䝞䝹䜽䛾ᤕᤊ☢ሙ≉ᛶ䛻ᑐ䛩䜛㻌㼀㼕 䝗䞊䝥ຠᯝ㻌㻱㼒㼒㼑㼏㼠㼟㻌㼛㼒㻌㼀㼕㻌㼐㼛㼜㼕㼚㼓㻌㼛㼚㻌㼠㼔㼑㻌㼠㼞㼍㼜㼜㼑㼐㻌㼒㼕㼑㼘㼐㻌㼜㼞㼛㼜㼑㼞㼠㼕㼑㼟㻌㼛㼒㻌㼠㼔㼑㻌㻹㼓㻮㻞㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㼎㼡㼘㼗㼟㻌㼒㼍㼎㼞㼕㼏㼍㼠㼑㼐㻌㼎㼥㻌㻿㻼㻿㻌㼙㼑㼠㼔㼛㼐㻌㻟䠊⤖ᯝ䛸⪃ᐹ
Fig. 1 䛻 Powder A 䜢⏝䛔䛶 SPS ἲ䚸HIP ἲ䛷స〇䛧䛯䝗䞊䝥䝞䝹䜽䛾 XRD 䝟䝍䞊䞁䜢♧䛩䚹඲䛶䛾䝞䝹䜽䛻䛚䛔䛶䚸୙⣧≀┦䛸䛧䛶 MgB4 ┦䜔 MgO ┦䛜ほ 䛥䜜䛯䚹HIP 䝞䝹䜽
䛸ẚ㍑䛧䛶 SPS 䝞䝹䜽䛷䛿୙⣧≀┦䛜ከ䛟ほ 䛥䜜䛯䚹Ti 䝗䞊䝥䝞䝹䜽䛻䛚䛔䛶ᮍ཯ᛂ䛾 Ti ┦䛿䜋䛸䜣䛹ほ 䛥䜜䛪䚸TiB2 ┦䛜ほᐹ䛥䜜䛯䛣䛸䛛䜙↝⤖䛻䜘䜚 Ti 䛜 B 䛸཯ᛂ䛧䛯䛣䛸䛜♧၀䛥䜜䜛䚹䛥䜙䛻䚸TiB2 䜢䝗䞊䝥䛧䛯䝞䝹䜽䛷䛿୙⣧≀䛸䛧䛶 TiB2 ┦䛜䛭䛾䜎䜎ほ 䛥䜜䛯䚹
Fig. 2 䛻 Powder A 䜢⏝䛔䛶 SPS ἲ䚸HIP ἲ䛻䜘䜚స〇䛧䛯䝜䞁䝗䞊䝥(pristine)䚸Ti 䜎䛯䛿 TiB2 䝗䞊䝥䝞䝹䜽䛾ᤕᤊ☢ሙ䛾 ᗘ౫Ꮡᛶ䜢♧䛩䚹HIP 䝞䝹䜽䛻䛚䛔䛶䚸Ti 䝗䞊䝥䝞䝹䜽Sample A SPS
TiB2‫ە‬TiB2‫ۂ‬MgO
Ћ

‫ۂ‬

Ћ‫ە‬

Ћ‫ە‬

Ћ‫ە‬

Ћ‫ۑ‬

‫ۑ‬MgB4

Ћ‫ۑ‬
Ћ‫ۑ‬

30

40

50

60

70

MgB2

MgB2

MgB2
Ћ‫ۑ‬
MgB2

Ћ‫ە‬

MgB2
Ћ‫ۑ‬
Ћ‫ۑ‬

20

MgB2

MgB2

Ћ‫ە‬

Sample A SPS
Ti

Sample A HIP
Ti

80

90

2T(deg)Fig.1 XRD patterns of the Ti/TiB2 doped MgB2 bulks.
3
2.5
Trapped Field (T)㻞䠊ᐇ㦂᪉ἲSPS ἲ䛷䛿↝⤖᫬䛻ヨᩱ䛾ᐦᑒ䛜ᅔ㞴䛷䛒䜚 Mg 䛾⵨Ⓨ䛜⃭䛧䛔䛸䛔䛖ၥ㢟䛛䜙䚸ᮏ◊✲䛷䛿ḟ䛻㏙䜉䜛 2 ✀㢮䛾ฟⓎཎᩱ䜢⏝ព䛧䛶 Ti 䝗䞊䝥䜢ヨ䜏䛯䚹୍䛴䛿䚸ᕷ㈍䛾 MgB2
⢊ᮎ(⣧ᗘ 99%, 䵐150 Pm)䛻 Ti 䜎䛯䛿 TiB2 䜢䛭䜜䛮䜜
10 %ῧຍ䛧䛯 Powder A䚸䜒䛖୍䛴䛿 Mg䚸B 䛻 Ti 䜎䛯䛿 TiB2
䜢䛭䜜䛮䜜ῧຍ䛧䛯ΰྜ⢊(䝰䝹ẚ Mg:B:Ti = 0.9:2:0.1,
Mg:B :TiB2 = 0.9:1.8:0.1)䜢 800 Υ䛷 6 ᫬㛫䛾ᖖᅽ↝⤖䜢᪋䛧䛯 Powder B 䜢ฟⓎཎᩱ䛸䛧䛯䚹ྛ⢊ᮎ䛿㐟ᫍᘧ䝪䞊䝹䝭䝹(250-400 rpm, 1-12 h, Ar ୰)䛻䜘䜚⢊○䛥䜜䛯䚹ཎᩱ⢊ᮎ䜢䜹䞊䝪䞁䝎䜲䝇(┤ᚄ 20 mm)䛻඘ሸ䛧䚸୍㍈ຍᅽᡂᙧ䛧䛯ᚋ䚸
20-100 Pa 䛾┿✵୰䛻䛚䛔䛶 950-1050°C 䛷 5-15 min 䛾 SPS
ฎ⌮䜢⾜䛳䛯䚹᭱኱༳ຍ㟁ὶ䛿 1000 A 䛸䛧䚸༳ຍᅽຊ䛿 50
MPa 䛸䛧䛯䚹ヨᩱ䛾┤ᚄ䛿 20 mm 䛷䛒䜚䚸ཌ䛥䛿 8-11 mm 䛷䛒䛳䛯䚹ఏᑟ෭༷ᆺ㉸㟁ᑟ䝬䜾䝛䝑䝖䜢⏝䛔䛶 5 T 䛾☢ሙ୰
䛷 MgB2 䝞䝹䜽䜢෭༷䛧䛯ᚋ䚸እ㒊☢ሙ䜢ྲྀ䜚㝖䛔䛶☢ሙ䜢ᤕᤊ䛥䛫䚸䝞䝹䜽⾲㠃୰ᚰ䛻䝉䝑䝖䛧䛯ᴟప ⏝䝩䞊䝹⣲Ꮚ䛻䜘䜚ᤕᤊ☢ሙ䛾 ᐃ䜢⾜䛳䛯䚹⢊○๓ᚋ䛾 MgB2 ⢊ᮎ䛾ᵓ
㐀䛿 X ⥺ᅇᢡἲ(XRD)䛷ホ౯䛧䛯䚹䜎䛯䚸⮫⏺㟁ὶᐦᗘ Jc
䛿 SQUID ☢᮰ィ䛷 ᐃ䛧䛯☢Ẽ䝠䝇䝔䝸䝅䝇᭤⥺䛛䜙ᣑᙇᆺ䝡䞊䞁䝰䝕䝹䛻䜘䜚⟬ฟ䛧䛯䚹㻌

intensity(a.u.)㻝䠊䛿䛨䜑䛻
ᮏ◊✲䜾䝹䞊䝥䛷䛿䛣䜜䜎䛷䚸ᖖᅽྜᡂἲ䛾䜹䝥䝉䝹ἲ䜔㧗ᅽྜᡂἲ䛷䛒䜛 HIP ἲ䜢⏝䛔䛶㧗ᐦᗘ MgB2 ㉸㟁ᑟయ䝞䝹䜽䜢స〇䛧䛶䛝䛯䚹HIP ἲ䝞䝹䜽䛿඘ሸ⋡䛜 90%௨ୖ䛸䛺䜚䚸ᤕᤊ☢ሙ䛿䜹䝥䝉䝹ἲ䛾 1.7 ಸ⛬ᗘ䜎䛷ྥୖ䛧䛯䚹䛥䜙䛻䚸୙⣧≀䛸䛧䛶 Ti 䜢䝗䞊䝥䛩䜛䛣䛸䛻䜘䜚⮫⏺㟁ὶᐦᗘ Jc 䛜ྥୖ䛩䜛䛸䛔䛖ሗ࿌౛䛜䛒䜛䚹ᮏ◊✲䜾䝹䞊䝥䛷䛿 Ti 䝗䞊䝥
HIP ἲ䝞䝹䜽䜢 in-situ ἲ䛷స〇䛧䚸䝞䝹䜽༢య⾲㠃䛷 3.6 T䛾ᤕᤊ☢ሙ್䜢ᐇ⌧䛧䛯[1,2]䚹䛣䛾ᤕᤊ☢ሙ䛾ྥୖ䛿䚸Ti 䛻䜘䜛 MgB2 ⤖ᬗ⢏䛾ᚤ⣽໬䛸 TiB2 䛾⏕ᡂ䛻䜘䜛䝢䞁䝙䞁䜾䝉䞁䝍䞊䛾ᑟධ䛻䜘䜛ຠᯝ䛷䛒䜛䛸䛥䜜䜛䚹䛥䜙䛻๓ᅇ䛾Ꮫ఍䛷ᡃ䚻䛿䚸▷᫬㛫↝⤖䛻䜘䜚⢏ᡂ㛗䛾ᢚไ䛜ྍ⬟䛸䛺䜛 SPS ἲ䛷䚸䝜䞁䝗䞊䝥 MgB2 ㉸㟁ᑟయ䝞䝹䜽䜢 ex-situ ἲ䛷స〇䛧䚸ᤕᤊ☢ሙ䛜 HIP ἲ䝞䝹䜽䛸ྠ⛬ᗘ䛸䛺䜛䛣䛸䜢ሗ࿌䛧䛯[3]䚹
ᮏ◊✲䛷䛿 Ti 䝗䞊䝥 MgB2 䝞䝹䜽䜢 SPS ἲ䛻䜘䜚స〇䛧䚸䛭䛾ᤕᤊ☢ሙ≉ᛶ䜢᫂䜙䛛䛻䛩䜛䛣䛸䜢┠ⓗ䛸䛧䛯䚹㻌Ћ‫ە‬㐲⸨㻌 ཭⌮䠈㻌 ෆ⸨㻌 ᬛஅ䠈㻌 ⸨௦㻌 ༤அ㻔ᒾᡭ኱㻕㻌㻱㻺㻰㻻㻌㼅㼡㼞㼕㻘㻌㻺㻭㻵㼀㻻㻌㼀㼛㼙㼛㼥㼡㼗㼕䠈㻌 㻲㼁㻶㻵㻿㻴㻵㻾㻻㻌㻴㼕㼞㼛㼥㼡㼗㼕㻌㻔㻵㼣㼍㼠㼑㻌㼁㼚㼕㼢㻚㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼠㻞㻞㻝㻠㻜㻜㻡㻬㼕㼣㼍㼠㼑㻙㼡㻚㼍㼏㻚㼖㼜㻌2pristine
Ti
TiB2

A}SampleSPS

pristine
Ti

A}Sample
HIP

1.5
FCM
B =5 T

1

ex

0.5
0
5

10

15

20 25 30 35
Temperature (K)40

45Fig. 2 Temperature dependence of the trapped field for thepristine and Ti/TiB2 doped MgB2 bulks.
䛿 pristine 䝞䝹䜽䛸ẚ㍑䛧䛶ᤕᤊ☢ሙ䛜ྥୖ䛧䛯䚹䛧䛛䛧䚸SPS䝞䝹䜽䛷䛿䚸pristine 䝞䝹䜽䛸ẚ㍑䛧䛶 Ti/TiB2 䝗䞊䝥䝞䝹䜽䛾ᤕᤊ☢ሙ䛿పୗ䛧䛯䚹䛥䜙䛻䚸㌿⛣ ᗘ䛾పୗ䜒ྠ᫬䛻☜ㄆ䛥䜜䛯䚹XRD 䝟䝍䞊䞁 SPS 䝞䝹䜽䛾䛛䜙䝞䝹䜽ෆ䛻୙⣧≀䛜ከ䛟Ꮡᅾ䛧䛶䛔䛯䛣䛸䛜䚸ᤕᤊ☢ሙ䜢పୗ䛥䛫䛯ཎᅉ䛷䛒䜛䛸⪃䛘䜛䚹ㅮ₇䛷䛿䚸Powder A 䜢⏝䛔䛯䝞䝹䜽䛾௚䛻 Powder B 䜢⏝䛔䛯䝞䝹䜽䛾ᤕᤊ☢ሙ≉ᛶ䜢ే䛫䛶ሗ࿌䛩䜛ணᐃ䛷䛒䜛䚹㻌ཧ⪃ᩥ⊩
1. T. Naito et al. : Supercond. Sci. Technol., vol. 28, (2015)
0950092. T. Yoshida et al. : IEEE Trans. vol. 25, (2015) Issure 3
3. Y. Endo et al. : Abstract of CSSJ Conference, vol. 91,(2015) 3C-a07

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1C-p06

Y 系，MgB2 バルク (1)㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚 ἲ䛻䜘䜛 㻟㻌㼀 ⣭ 㻹㼓㻮㻞 䝞䝹䜽䛾స〇㻌㻲㼍㼎㼞㼕㼏㼍㼠㼕㼛㼚㻌㼛㼒㻌㻟㼀㻌㼏㼘㼍㼟㼟㻌㻹㼓㻮㻞㻌㼎㼡㼘㼗㻌㼙㼍㼓㼚㼑㼠㻌㼎㼥㻌㼕㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚㻌㼙㼑㼠㼔㼛㼐㻌㻌Ⲷ㔝㻌 ᪂䠈㻌 ෆ⸨㻌 ᬛஅ㻘㻌 ⸨௦㻌 ༤அ㻌 䠄ᒾᡭ኱䠅㻌㻻㻳㻵㻺㻻㻌㻭㼞㼍㼠㼍㻘㻌㻺㻭㻵㼀㻻㻌㼀㼛㼙㼛㼥㼡㼗㼕䠈㻌 㻲㼁㻶㻵㻿㻴㻵㻾㻻㻌㻴㼕㼞㼛㼥㼡㼗㼕㻌㻔㻵㼣㼍㼠㼑㻌㼁㼚㼕㼢㻚㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼠㻞㻞㻝㻡㻜㻜㻡㻬㼕㼣㼍㼠㼑㻙㼡㻚㼍㼏㻚㼖㼜㻌㻌㻝䠊䛿䛨䜑䛻㻌
㻹㼓㻮㻞 䛿㔠ᒓ㛫໬ྜ≀୰䛷᭱㧗䛾㉸㟁ᑟ㌿⛣ ᗘ 㼀㼏㻩㻟㻥㻌㻷 䜢ᣢ䛱䚸㻞㻜㻌 㻷 ⣭䛷䛾ᛂ⏝䛜ᮇᚅ䛥䜜䜛䚹䜎䛯䚸䝁䝠䞊䝺䞁䝇㛗䛜㛗䛟䚸㟁☢ⓗ␗᪉ᛶ䛜ప䛔䛸䛔䛖≉ᚩ䜢ᣢ䛴䛯䜑䚸ከ⤖ᬗయ䛾䝞䝹䜽䛷㧗䛔⮫⏺㟁ὶᐦᗘ䜢ᚓ䜛䛣䛸䛜ྍ⬟䛷䛒䜛䚹㻹㼓㻮㻞 䛿 㻹㼓 䛸 㻮 䛾༢⣧䛺஧ඖ⣔䛾໬ྜ≀䛷䛒䜛䛯䜑䚸ཎᩱ⢊ᮎ䛻 㻹㼓 䛸 㻮 䜢⏝䛔䜛 㼕㼚㻙㼟㼕㼠㼡 ἲ䛻䜘䜚䚸ẚ㍑ⓗ⡆౽䛻䝞䝹䜽స〇䛜ྍ⬟䛷䛒䜛䚹㻌㧗䛔ᤕᤊ☢ሙ䛾 㻹㼓㻮㻞 䝞䝹䜽䜢స〇䛩䜛䛯䜑䛻䛿䚸඘ሸ⋡䜢ྥୖ䛥䛫⢏⏺䛾ᩘ䜢ቑ䜔䛧䚸⮫⏺㟁ὶᐦᗘ䜢ྥୖ䛥䛫䜛ᚲせ䛜䛒䜛䚹䛭䛾䛯䜑䚸ᡃ䚻䛿㧗ᅽୗ↝⤖ἲ䛷䛒䜛 㻴㻵㻼㻌 㻔㻴㼛㼠㻌㻵㼟㼛㼟㼠㼍㼠㼕㼏㻌㻼㼞㼑㼟㼟㼕㼚㼓㻕ἲ䜔 㻿㻼㻿㻌㻔㻿㼜㼍㼞㼗㻌㻼㼘㼍㼟㼙㼍㻌㻿㼕㼚㼠㼑㼞㼕㼚㼓㻕ἲ䛻䜘䜚䚸㧗඘ሸ⋡䛺䝞䝹䜽䜢స〇䛧䛶䛝䛯䠷㻝䚸㻞䠹䚹䛧䛛䛧䚸䛣䜜䜙䛾᪉ἲ䛻䛿㧗䝁䝇䝖䛷䛒䛳䛯䜚䚸ᑓ⏝䛾⿦⨨䛜ᚲせ䛷䛒䛳䛯䜚䛸䛔䛳䛯▷ᡤ䛜䛒䜛䚹୍᪉䚸ᮏ◊✲䛷⏝䛔䛯 㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚 ἲ䛿䚸ᖖᅽୗ䛷 㻮 䝨䝺䝑䝖䛻 㻹㼓 ⼥ᾮ䜢ᾐ㏱䛥䛫 㻹㼓㻮㻞 䜢ᚓ䜛᪉ἲ䛷䛒䜚䚸ẚ㍑ⓗ⡆౽䛛䛴Ᏻ౯䛻㧗䛔඘ሸ⋡䜢ᚓ䜛䛣䛸䛜䛷䛝䜛䚹䜎䛯䚸స〇䛷䛝䜛䝞䝹䜽ᙧ≧䛾⮬⏤ᗘ䛜㧗䛟䚸ᵝ䚻䛺ᙧ䛾䝞䝹䜽䜢స〇䛷䛝䜛䛸䛔䛖≉ᚩ䛜䛒䜛䠷㻟䠹䚹㻌ᮏ◊✲䛷䛿䚸⮬స䛾䜹䝥䝉䝹䜢⏝䛔䛯 㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚 ἲ䛻䜘䛳䛶 㻹㼓㻮㻞 䝞䝹䜽䜢స〇䛧䚸䛭䛾ᤕᤊ☢ሙ≉ᛶ䛻䛴䛔䛶ホ౯䛧䛯䚹㻌㻌㻞䠊ᐇ㦂᪉ἲ㻌ཎᩱ⢊ᮎࡣ⤖ᬗ 㻮 ⢊ᮎ ⣧ᗘ ࠊ⢏ᚄ wP ࠊ0J ⢊ᮎ ⣧ᗘ ࠊ⢏ᚄ wP ࢆ⏝࠸ࡓࠋ)LJ ࡢࡼ࠺࡟⮬సࡢࢫࢸࣥࣞࢫᐜჾ࡟⤖ᬗ % ⢊ᮎࢆワࡵࠊ0J ⼥ᾮࡀ㏻
ࡿࡓࡵࡢ✰ࢆ✵ࡅࡓ㌾㕲࢞ࢫࢣࢵࢺ࡜ 㻹㼓 ⢊ᮎ䜢ワ䜑䛯ᐜჾ䜢㔜䛽ᐦᑒ䛧䛯䚹㻹㼓 ⢊ᮎ䛸⤖ᬗ 㻮 ⢊ᮎ䛾䝰䝹ẚ䛿 㻝㻚㻢㻌㻦㻌㻞䛷䛒䛳䛯䚹↝⤖ ᗘ䛿 㻥㻜㻜㻌 䉝䚸↝⤖᫬㛫䛿 㻥 ᫬㛫䛸䛧䛯䚹↝⤖ᚋ䚸ᶵᲔຍᕤ䜢᪋䛧ᐜჾ䛛䜙䝞䝹䜽䜢ྲྀ䜚ฟ䛧䛯䚹䝞䝹䜽䛾┤ᚄ䛿 㻟㻜㻌㼙㼙 ཌ䛥䛿 㻢㻚㻢㻌㼙㼙 䛷䛒䛳䛯䚹㻌ఏᑟ෭༷ᆺ㉸㟁ᑟ࣐ࢢࢿࢵࢺࢆ⏝࠸࡚ࠊ7 ࡢእ㒊☢
ሙୗ࡛ 0J% ࣂࣝࢡࢆ෭༷ࡋࡓᚋ࡟☢ሙࢆྲྀࡾ㝖ࡁࠊ☢ሙࢆᤕᤊࡉࡏࡓࠋᤕᤊ☢ሙࡣࣂࣝࢡ⾲㠃୰ᚰ࡟タ⨨ࡋࡓ࣮࣍ࣝࢭࣥࢧ̿ࢆ⏝࠸࡚ ᐃࡋࡓࠋస〇ࡋࡓࣂࣝࢡࡢ┦ྠᐃࡣࠊ; ⥺ᅇᢡἲ ;5' ࡛⾜ࡗࡓࠋ⮫⏺㟁ὶᐦᗘࡣ 648,'☢᮰ィ࡛ ᐃࡋࡓ☢Ẽࣄࢫࢸࣜࢩࢫ᭤⥺࠿ࡽᣑᙇᆺࣅ࣮
ࣥࣔࢹࣝࢆ⏝࠸࡚⟬ฟࡋࡓࠋ㻌㻌㻟䠊⤖ᯝ䛸⪃ᐹ㻌㻲㼕㼓㻚㻞 䛻స〇䛧䛯 㻹㼓㻮㻞 䝞䝹䜽䛾 㼄㻾㻰 䝟䝍䞊䞁䜢♧䛩䚹䝞䝹䜽⾲㠃ഃ䛷䛿䚸୙⣧≀䛾ᑡ䛺䛔 㻹㼓㻮㻞 ┦䛜ᚓ䜙䜜䛯䛣䛸䛜ศ䛛䜛䚹䜎䛯䚸䝞䝹䜽ᗏഃ䛷䛿 㻹㼓㻮㻞 䛾௚䛻ⱝᖸ䛾 㻹㼓㻞㻮㻞㻡 䛜⏕ᡂ䛥䜜䛶䛔䜛䛣䛸䛜ศ䛛䜛䚹䛣䜜䛿䚸䝞䝹䜽ᗏഃ䛿⾲㠃ഃ䜘䜚䜒 㻹㼓 䛾ᾐ㏱㊥㞳䛜㛗䛔䛯䜑䚸㻹㼓 䛜୙㊊䛧䛯䛯䜑䛰䛸⪃䛘䜙䜜䜛䚹㻌㻲㼕㼓㻚㻟 䛻 㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚 ἲ䛷స〇䛧䛯䝞䝹䜽䛾ᤕᤊ☢ሙ䛾ᗘ౫Ꮡᛶ䜢♧䛩䚹᭱኱ᤕᤊ☢ሙ䛿䚸㻝㻡㻚㻥㻌 㻷 䛻䛚䛔䛶 㻞㻚㻠㻌 㼀䚸㻞㻜㻌 㻷 䛻䛚䛔䛶 㻞㻚㻝㻌 㼀 䛸䛔䛖್䛷䛒䛳䛯䚹㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚 ἲ䛻䜘䜚స〇䛧䛯䝞䝹䜽䛿䚸䜽䝷䝑䜽䛾ᨵၿ䜔↝⤖᮲௳➼䛾స〇᮲௳䛾᭱㐺໬䛻䜘䜚䚸䛥䜙䛻ᤕᤊ☢ሙྥୖ䛾వᆅ䛜䛒䜛䚹㻌㻌㻌㻲㼕㼓㻚㻝㻌 㻯㼞㼛㼟㼟㻌 㼟㼑㼏㼠㼕㼛㼚㻌 㼛㼒㻌 㼠㼔㼑㻌 㻯㼍㼜㼟㼡㼘㼑㻌 㼒㼛㼞㻌 㼠㼔㼑㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚㻌㼙㼑㼠㼔㼛㼐㻚㻌 㻌㻲㼕㼓㻚㻞㻌㼄㻾㻰㻌㼜㼍㼠㼠㼑㼞㼚㼟㻌㼛㼒㻌㻹㼓㻮㻞㻌㼎㼡㼘㼗㻌㼒㼍㼎㼞㼕㼏㼍㼠㼑㼐㻌㼎㼥㻌㻵㼚㼒㼕㼘㼠㼞㼍㼠㼕㼛㼚㼙㼑㼠㼔㼛㼐㻚㻌

㻲㼕㼓㻚㻟㻌 㼀㼑㼙㼜㼑㼞㼍㼠㼡㼞㼑㻌 㼐㼑㼜㼑㼚㼐㼑㼚㼏㼑㻌 㼛㼒㻌 㼠㼔㼑㻌 㼠㼞㼍㼜㼜㼑㼐㻌 㼒㼕㼑㼘㼐㻌 㼒㼛㼞㻹㼓㻮㻞㻌㼎㼡㼘㼗㻚㻌ཧ⪃ᩥ⊩㻌䠷㻝䠹㼀㻚㻌㼅㼛㼟㼔㼕㼐㼍㻌㼑㼠㻌㼍㼘㻚㻦㻭㼜㼜㼘㼕㼑㼐㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼢㼕㼠㼥㻘㻌㻵㻱㻱㻱㻌㼀㼞㼍㼚㼟㼍㼏㼠㼕㼛㼚㼟㻌㼛㼚㻌㻔㼂㼛㼘㼡㼙㼑㻦㻞㻡㻘㻌㻵㼟㼟㼡㼑㻦㻟㻕㻌䠷㻞䠹㐲⸨䚸௚䠖ప ᕤᏛ䞉㉸㟁ᑟᏛ఍ᴫせ㞟㻌 㻥㻝㻌 䠄㻞㻜㻝㻡䠅㻟㻯㻙㼍㻜㻣㻌
䠷㻟䠹㻳㻚㻌㻳㼕㼡㼚㼏㼔㼕㻌㼑㼠㻌㼍㼘㻚㻦㻯㼞㼥㼛㼓㼑㼚㼕㼏㼟㻌㻠㻢㻌㻔㻞㻜㻜㻢㻕㻌㻞㻟㻣㻙㻞㻠㻞㻌̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-p07

Y 系，MgB2 バルク (1)㧗඘ሸ⋡ 㻹㼓㻮㻞 䝞䝹䜽䛾ᤕᤊ☢ሙ䛻ᑐ䛩䜛⢏ᚄไᚚ䛸୙⣧≀䝗䞊䝥ຠᯝ㻌㻱㼒㼒㼑㼏㼠㼟㻌㼛㼒㻌㼓㼞㼍㼕㼚㻌㼟㼕㼦㼑㻌㼍㼚㼐㻌㼕㼙㼜㼡㼞㼕㼠㼥㻌㼐㼛㼜㼕㼚㼓㻌㼛㼚㻌㼠㼔㼑㻌㼠㼞㼍㼜㼜㼑㼐㻌㼒㼕㼑㼘㼐㼟㻌㼛㼒㻌㼔㼕㼓㼔㼘㼥㻌㼐㼑㼚㼟㼑㻌㻹㼓㻮㻞㻌㼎㼡㼘㼗㼟㻌㻌ෆ⸨㻌 ᬛஅ䠈Ⲷ㔝㻌 ᪂䠈⸨௦㻌 ༤அ㻌 㻔ᒾᡭ኱㻕㻧㻌 ῐ㊰㻌 ᬛ㻌 㻔ᮾ໭኱㻕㻌㻺㻭㻵㼀㻻㻌㼀㼛㼙㼛㼥㼡㼗㼕㻘㻌㻻㻳㻵㻺㻻㻌㻭㼞㼍㼠㼍㻘㻌㻲㼁㻶㻵㻿㻴㻵㻾㻻㻌㻴㼕㼞㼛㼥㼡㼗㼕㻌㻔㻵㼣㼍㼠㼑㻌㼁㼚㼕㼢㻚㻕㻧㻌㻭㼃㻭㻶㻵㻌㻿㼍㼠㼛㼟㼔㼕㻌㻔㼀㼛㼔㼛㼗㼡㻌㼁㼚㼕㼢㻚㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼠㼚㼍㼕㼠㼛㻬㼕㼣㼍㼠㼑㻙㼡㻚㼍㼏㻚㼖㼜㻌㻌

5pristine w/o BM
pristine-BM
Ti10%-BM
C10%-BM
B4C10%-BM

4

BT (T)

㻝䠊䛿䛨䜑䛻㻌
㻹㼓㻮㻞 䜢⏝䛔䛯䝞䝹䜽☢▼䛾㛤Ⓨ䛜㏆ᖺ⢭ຊⓗ䛻⾜䜟䜜䛶䛚䜚䚸㻡㻚㻠 䝔䝇䝷㻔㻝㻞㻷㻕䛜⌧ᅾ䛾᭱㧗ᤕᤊ☢ሙ್䛷䛒䜛㼇㻝㼉䚹ᤕᤊ☢ሙ䛾ྥୖ䛻䛿☢᮰䝢䞁Ṇ䜑୰ᚰ䛸䛺䜛⢏⏺ᐦᗘ䛾ቑຍ䜔୙⣧≀䛾ᑟධ䛜᭷ຠ䛷䛒䜛䚹⥺ᮦ䜢୰ᚰ䛸䛧䛯 㻹㼓㻮㻞 䛻㛵䛩䜛䛣䜜䜎䛷䛾ከ䛟䛾◊✲䛻䛚䛔䛶䚸⢏⏺䛿ཎᩱ⢊ᮎ䛾ᚤ⣽໬䜔⦓ᐦ໬䛻䜘䛳䛶䛺䛥䜜䛶䛝䛯䚹䜎䛯䚸㼀㼕㼇㻞㼉䜔 㻯㼇㻟㼉䛜᭷ຠ䛺䝗䞊䝥ඖ⣲䛷䛒䜛䛣䛸䛜▱䜙䜜䛶䛔䜛䚹䛭䛣䛷䚸ᡃ䚻䛿 㼀㼕䜔 㻿㼕㻯 䜢䝗䞊䝥䛧䛯㧗⦓ᐦ 㻹㼓㻮㻞 䝞䝹䜽㻔඘ሸ⋡ 㻥㻜㻑௨ୖ㻕䜢㼕㼚㻙㼟㼕㼠㼡 ➼᪉ᅽຍᅽ↝⤖㻔㻴㻵㻼㻕ἲ䛷స〇䛧䚸䛭䛾ᤕᤊ☢ሙ䜢ホ౯䛧䛯䚹䛭䛾⤖ᯝ䚸㼀㼕 䝗䞊䝥㻔䝗䞊䝥㔞 㻡㻙㻞㻜㻑㻕䛾༢య䝞䝹䜽⾲㠃䛷 㼜㼞㼕㼟㼠㼕㼚㼑 䝞䝹䜽䛾⣙ 㻝㻚㻟 ಸ䛸䛺䜛 㻟㻚㻢 䝔䝇䝷䠄㻝㻠㻷䠅䛾ᤕᤊ☢ሙ䚸䛥䜙䛻 㻞 ᯛ✚ᒙ䝞䝹䜽୰ᚰ䛷ᤕᤊ☢ሙ 㻠㻚㻢 䝔䝇䝷䠄㻝㻠㻷䠅䛜ᚓ䜙䜜䛯㼇㻠㼉䚹䛣䜜䜙ᤕᤊ☢ሙ䛾ྥୖ䛿 㼀㼕 䝗䞊䝥䛻䜘䛳䛶㻹㼓㻮㻞 ⤖ᬗ⢏䛜ᚤ⣽໬䛥䜜䜛䛸䛸䜒䛻⏕ᡂ䛥䜜䛯 㼀㼕㻮㻞 䛜᪂䛧䛔䝢䞁Ṇ䜑୰ᚰ䛸䛧䛶ᶵ⬟䛩䜛䛣䛸䛻䜘䛳䛶䜒䛯䜙䛥䜜䜛஦䛜㻱㻼㻹㻭 䜔㟁Ꮚ⥺ᚋ᪉ᩓ஘ᅇᢡ㻔㻱㻮㻿㻰㻕䛻䜘䜛⤌⧊ほᐹ䛛䜙᫂䜙䛛䛸䛺䛳䛯䚹୍᪉䚸㻿㼕㻯 䝗䞊䝥䝞䝹䜽䛷䛿ῧຍ㔞 㻝㻜㻑䛷ᤕᤊ☢ሙ 㻞㻚㻥 䝔䝇䝷㻔㻝㻢㻷㻕䛜ᚓ䜙䜜䛯䛜䚸㻿㼕㻯 䝗䞊䝥䛿 㼀㼕 䝗䞊䝥䛻ẚ䜉䛶䝢䞁Ṇ䜑ຠᯝ䛜ప䛔䛣䛸䛜ศ䛛䛳䛯䚹㻌ᮏ◊✲䛷䛿 㻹㼓㻮㻞 ⤖ᬗ⢏ᚤ⣽໬䛻ᑐ䛧䛶 㼀㼕 䛻䜘䜛໬Ꮫⓗᡭἲ䛸䝪䞊䝹䝭䝹⢊○䛻䜘䜛≀⌮ⓗᡭἲ䜢ే䛫䛶㐺⏝䛩䜛䛣䛸䛷᭦䛺䜛ᤕᤊ☢ሙ䛾ྥୖ䜢┠ᣦ䛩䛣䛸䜢┠ⓗ䛸䛧䛯䚹䜎䛯䚸㻿㼕㻯 ௨እ䛷☢᮰䝢䞁Ṇ䜑୰ᚰ䛾ᑟධ䛻᭷ຠ䛺 㻯 ῧຍ※䜢᫂䜙䛛䛻䛩䜉䛟 㻯 䛸 㻮㻠㻯 䜢䝗䞊䝥䛧䛯 㻹㼓㻮㻞 䝞䝹䜽䛾ᤕᤊ☢ሙ≉ᛶ䜢ㄪ䜉䛯䚹㻌
㻌㻞䠊ᐇ㦂᪉ἲ㻌඲䛶䛾䝞䝹䜽䛿 㼕㼚㻙㼟㼕㼠㼡㻌㻴㻵㻼 ἲ䛷స〇䛧䛯䚹ฟⓎཎᩱ䛿 㻹㼓䚸㻮 䛚䜘䜃ῧຍඖ⣲㻔㼀㼕䚸㻯䚸㻮㻠㻯㻕䜢ῧຍ㔞 㻝㻜㼙㼛㼘㻑䛸䛧䛶⛗㔞䛧䛯ᚋ䝪䞊䝹䝭䝹ΰྜ䛧䛯䜒䛾䛸䛧䛯䚹䝪䞊䝹䝭䝹ΰྜ䛿 㻭㼞 㞺ᅖẼ୰䚸㻞㻡㻜㼞㼜㼙㻔䝪䞊䝹䛚䜘䜃ᐜჾ䛾ᮦ㉁䛿䝯䝜䜴㻕䚸㻝㻞 ᫬㛫䛾᮲௳䛷⾜䛳䛯䚹㻴㻵㻼 ↝⤖䛿༳ຍᅽຊ 㻥㻤㻹㻼㼍䚸㻥㻜㻜䉝䚸㻟 ᫬㛫ಖᣢ䛾᮲௳ୗ䛷ᐇ᪋䛧䛯䚹䝞䝹䜽䝃䜲䝈䛿┤ᚄ 㻟㻣㻙㻟㻤㼙㼙䚸ཌ䛥 㻣 䟚䛷䛒䛳䛯䚹ᚓ䜙䜜䛯 㻹㼓㻮㻞 䝞䝹䜽䜢☢ሙ୰෭༷╔☢ἲ㻔༳ຍ☢ሙ 㻡 䝔䝇䝷㻕䛻䜘䛳䛶╔☢䛧䚸䝞䝹䜽⾲㠃୰ᚰ䛾ᤕᤊ☢
ሙ䜢䝩䞊䝹⣲Ꮚ䛷 ᐃ䛧䛯䚹㻌㻌㻟䠊ᐇ㦂⤖ᯝ䛸⪃ᐹ㻌ᅗ 㻝 䛻ྛ 㻹㼓㻮㻞 䝞䝹䜽䛾ᤕᤊ☢ሙ䛾 ᗘ౫Ꮡᛶ䜢♧䛩䚹㻞㻜㻷 䛾ᤕᤊ☢ሙ್䛻䛴䛔䛶௨ୗ䛻ẚ㍑䛩䜛䚹㼜㼞㼕㼟㼠㼕㼚㼑 䝞䝹䜽䛻䛴䛔䛶䛿䚸䝪䞊䝹䝭䝹䠄㻮㻹䠅ຠᯝ䛻䜘䛳䛶ᤕᤊ☢ሙ䛿 㻞㻚㻝㻣䝔䝇䝷䛛䜙 㻞㻚㻡㻤 䝔䝇䝷䛻ቑຍ䛧䛯䚹㼀㼕㻝㻜㻑㻙㻮㻹 䝞䝹䜽䛾ᤕᤊ☢
ሙ䛿 㻟㻚㻠㻢 䝔䝇䝷䛸 㼜㼞㼕㼟㼠㼕㼚㼑㻙㻮㻹 䛾 㻝㻚㻟 ಸ䛷䛒䛳䛯䚹୍᪉䚸㻯㻙㻮㻹 䛚䜘䜃 㻮㻠㻯㻙㻮㻹 䝞䝹䜽䛾ᤕᤊ☢ሙ䛿䚸䛭䜜䛮䜜 㻝㻚㻥㻟䝔䝇䝷䛚䜘䜃 㻝㻚㻝㻡 䝔䝇䝷䛸 㼜㼞㼕㼟㼠㼕㼚㼑㻙㻮㻹 䝞䝹䜽䜢ୗᅇ䛳䛯䚹㻯䝗䞊䝥䛻䜘䜛⮫⏺ ᗘ 㼀㼏 䛾పୗ䛜ప䛔ᤕᤊ☢ሙ䛾ཎᅉ䛸⪃䛘䜙䜜䜛䚹䛯䛰䛧䚸 ᗘ౫Ꮡᛶ䜢ぢ䜛䛸䜘䜚ప ᗘ㡿ᇦ䛷䛿 㻯䝗䞊䝥䝞䝹䜽䛾ᤕᤊ☢ሙ᭤⥺䛸 㼜㼞㼕㼟㼠㼕㼚㼑 䛚䜘䜃 㼀㼕 䝗䞊䝥䝞䝹䜽䛾ᤕᤊ☢ሙ᭤⥺䛜䜽䝻䝇䛩䜛䛣䛸䛜ᮇᚅ䛥䜜䜛䚹ᚑ䛳䛶䚸ືస ᗘ 㻠㻚㻞㻷 䛷䛒䜜䜀 㻯 䝗䞊䝥䜒᭷ຠ䛸䛺䜚ᚓ䜛䚹䜎䛯䚸㼀㼕㻝㻜㻑㻙㻮㻹 䛾᭱኱ᤕᤊ☢ሙ䛿 㻟㻚㻥㻟 䝔䝇䝷㻔㻝㻢㻚㻡㻷㻕䛷䛒䜚䚸㻝㻜㻷௨ୗ䛷䛿ᤕᤊ☢ሙ 㻡 䝔䝇䝷䜢ᐇ⌧䛷䛝䜛ྍ⬟ᛶ䛜䛒䜛䚹㻌

3
2
1
HIP-MgB2 bulks
0
0

10

20
T (K)

30

40

㻌
㻲㼕㼓㻚㻝㻦㻌㼀㼑㼙㼜㼑㼞㼍㼠㼡㼞㼑㻌㼐㼑㼜㼑㼚㼐㼑㼚㼏㼑㻌㼛㼒㻌㼠㼔㼑㻌㼠㼞㼍㼜㼜㼑㼐㻌㼙㼍㼓㼚㼑㼠㼕㼏㻙㼒㼕㼑㼘㼐㻌㼛㼒㻌㼠㼔㼑㻌㼜㼞㼕㼟㼠㼕㼚㼑㻌㼍㼚㼐㻌㼕㼙㼜㼡㼞㼕㼠㼥㻌㻔㼀㼕㻘㻌㻯㻘㻌㻮㻠㻯㻕㻌㼐㼛㼜㼑㼐㻌㻹㼓㻮㻞㻌㼎㼡㼘㼗㼟㻚㻌
ㅮ₇ᙜ᪥䛿䚸⮫⏺㟁ὶᐦᗘ䜔ୖ㒊⮫⏺☢ሙ䛾 ᗘ౫Ꮡᛶ䛸ే䛫䛶䛣䜜䜙 㻹㼓㻮㻞 䝞䝹䜽䛾ᤕᤊ☢ሙ≉ᛶ䛻䛴䛔䛶㆟ㄽ䛩䜛ணᐃ䛷䛒䜛䚹㻌㻌ཧ⪃ᩥ⊩㻌㻝㻚㻌 G. Fuchs et al., Supercond. Sci. Technol. 26 (2013)
122002.
㻞㻚㻌 Y. Zhao et al., Appl. Phys. Lett. 79 (2001) 1154.㻌
㻟㻚㻌 S.X. Dou et al., Appl. Phys. Lett. 81 (2002) 3419.㻌
㻠㻚㻌 T. Naito et al., Supercond. Sci. Technol. 25 (2012) 095012.㻌
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第92回

2015年度秋季低温工学・超電導学会

1C-p08

NMR 用バルク磁石

㻺㻹㻾⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾㻺㻹㻾ィ䛾㐍ᒎ㻌㻼㼞㼛㼓㼞㼑㼟㼟㻌㼛㼒㻌㻮㼡㼘㼗㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㻹㼍㼓㼚㼑㼠㻌㼒㼛㼞㻌㼔㼕㼓㼔㻌㼞㼑㼟㼛㼘㼡㼠㼕㼛㼚㻌㻺㻹㻾㻌㼟㼜㼑㼏㼠㼞㼛㼟㼏㼛㼜㼥㻌㻌௰ᮧ㻌 㧘ᚿ䠄⌮◊䠅䠗ఀ⸨㻌 ెᏕ㻘㻌 ᰗ㻌 㝧௓䠄䜲䝮䝷ᮦ◊䠅䠗᰿ᮏ㻌 ㈗ᏹ㻘㻌 ෆᾏ㻌 ༤᫂㻔㻶㻱㻻㻸㻌㻾㻱㻿㻻㻺㻭㻺㻯㻱㻕㻧㻌 ⸨௦㻌 ༤அ䠄ᒾᡭ኱䠅㻌㻺㻭㻷㻭㻹㼁㻾㻭㻌㼀㼍㼗㼍㼟㼔㼕㻌㻔㻾㻵㻷㻱㻺㻕㻧㻌㻵㼀㻻㻴㻌㼅㼛㼟㼔㼕㼠㼍㼗㼍㻘㻌㼅㻭㻺㻭㻳㻵㻌㼅㼛㼡㼟㼡㼗㼑㻌㻔㻵㻹㻾㻭㻌㻹㼍㼠㼑㼞㼕㼍㼘㻕㻧㻌㻺㻱㻹㻻㼀㻻㻌㼀㼍㼗㼍㼔㼕㼞㼛㻘㻌㼁㼀㻿㼁㻹㻵㻌㻴㼕㼞㼛㼍㼗㼕㻌㻔㻶㻱㻻㻸㻌㻾㻱㻿㻻㻺㻭㻺㻯㻱㻕㻧㻌㻲㼁㻶㻵㻿㻴㻵㻾㻻㻌㻴㼕㼞㼛㼥㼡㼗㼕㻌㻔㻵㼣㼍㼠㼑㻌㼁㼚㼕㼢㻚㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼠㼍㼗㼍㼟㼔㼕㻚㼚㼍㼗㼍㼙㼡㼞㼍㻬㼞㼕㼗㼑㼚㻚㼖㼜㻌㻌ᐃ䜢⾜䛳䛯䚹್༙ᖜ 㻝㻌 㻴㼦 䜎䛷䝇䝨䜽䝖䝹䛾ศゎ⬟䜢ୖ䛢䜛㻝䠊䛿䛨䜑䛻㻌
䛣䛸䛜䛷䛝䛯䛜䚸䜎䛰䚸㼄㼅 ᖹ㠃䛾☢ሙㄪᩚ䛜඘ศ䛷䛝䛶䛔䛺㏆ᖺ䛾ᜏᖖⓗ䛺䝦䝸䜴䝮୙㊊䛻䜘䜛 㻺㻹㻾䚸㻹㻾㻵 ㉸㟁ᑟ☢
䛔䛯䜑䚸䝃䜲䝗䝞䞁䝗䛜ほ 䛥䜜䛶䛔䜛䚹䛣䜜䛿䚸䝞䝹䜽☢▼▼㻔㻿㼡㼜㼑㼞㻌 㻯㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌 㻹㼍㼓㼚㼑㼠㻦㻌 㻿㻯㻹㻕䛾⥔ᣢ㈝䛾㧗㦐䛾ゎỴ䛾 㼄㼅 㠃䛻ᑐ䛩䜛☢ሙᆒ୍ᛶ䛜୙㊊䛧䛶䛔䜛䛯䜑䛛䚸䜎䛰䚸䝅ἲ䛸䛧䛶䚸ᡃ䚻䛿ᑠᆺ䛾 㻳㻹 䝟䝹䝇⟶෭෾ᶵ䛻䜘䜛䚸ఏᑟ෭䝭䞁䜾䛻䜘䜛᭱㐺໬䛜୙㊊䛧䛶䛔䜛䛛䛻䛴䛔䛶ៅ㔜䛻ホ౯䛧༷䜢⏝䛔䛯㧗 ㉸㟁ᑟ䝞䝹䜽య䛾 㻺㻹㻾䚸㻹㻾㻵 ⏝ 㻿㻯㻹 䜢㛤Ⓨ䛺䛡䜜䜀䛺䜙䛺䛔䚹䛧䛛䛧䚸௒ᅇ䛾ᐇ㦂䛷䚸ᵓ㐀ゎᯒ䛻ᚲせ䛧 䚸 㻺㻹㻾 ಙ ྕ 䜢 ᚓ 䛯 >@ 䚹 䛭 䛾 ᚋ 䚸 ☢ ሙ ୰ ෭ ༷ ἲ 㻔㻲㼕㼑㼘㼐㻌䛺䝇䝢䞁䜹䝑䝥䝸䞁䜾䜎䛷ほ 䛷䛝䛯䛾䛷䚸䝞䝹䜽☢▼䛿㧗ศ㻯㼛㼛㼘㼕㼚㼓㻌㻹㼑㼠㼔㼛㼐㻌㻦㻌㻲㻯㻹㻕㻌 䛻䛶㟼☢ሙ╔☢䜢ᐇ᪋䛩䜛㝿䚸╔☢
ゎ⬟ 㻺㻹㻾 䛻ᚲせ䛺☢ሙᆒ୍ᛶ䜢ᚓ䜛䛣䛸䛜䛷䛝䜛䛣䛸䜢䚸඘⏝ 㻿㻯㻹 䛜ᙧᡂ䛩䜛☢ሙᆒ୍ᗘ䜢஘䛥䛺䛔䝞䝹䜽㉸㟁ᑟయศ䛻♧䛧䛶䛔䜛䚹㻌㻱㼡㻙㻮㼍㻙㻯㼡㻙㻻 䜢㛤Ⓨ㼇㻞㼉䛧䚸䛥䜙䛻䚸㟼☢ሙ╔☢⏝ 㻿㻯㻹 䛾ᣢ㻌䛴☢ሙᆒ୍ᗘ䛾୍㒊䜢䚸䝞䝹䜽☢▼ෆ㒊䛻ྠ⛬ᗘ䛻ᙧᡂ䛷䛝䜛䜘䛖䝅䝭䝳䝺䞊䝅䝵䞁䛷ồ䜑䛯䝃䜲䝈䛾䝞䝹䜽☢ᴟ䜢స〇䛧䚸㻹㻾㻵 䛷ホ౯㼇䠏㼉䛧䛯䚹䛭䛾⤖ᯝ䛛䜙䚸ෆᚄ䛾␗䛺䜛䝞䝹䜽య䜢⤌䜏ྜ䜟䛫䛯䝞䝹䜽㉸㟁ᑟ☢▼䛷䛾ᤕᤊ☢ሙᆒ୍ᗘ䛾ྥୖ䜢ሗ࿌㼇㻠㻘㻡㼉䛧䛯䚹௒ᅇ䛿䚸䛣䛾☢▼䛻ᑐ䛧䛶䚸㧗ศゎ⬟ 㻺㻹㻾䛻ᚲせ䛺䝅䝮䝁䜲䝹䚸☢ሙ䝻䝑䜽⿦⨨䚸䛭䛧䛶ヨᩱᅇ㌿⿦⨨䜢ᐇ⿦䛧䚸㧗ศゎ⬟ 㻺㻹㻾 䛾ᐇ㦂䜢ᐇ᪋䛧䛯䛾䛷䚸䛣䜜䜢ሗ࿌䛩
䜛䚹㻌
㻌
㻞䠊ᐇ㦂㻌
㻱㼡㻙㻮㼍㻙㻯㼡㻙㻻 䜢⏝䛔䛯እᚄ 㻢㻜㻌㼙㼙䚸ෆᚄ 㻞㻤㻌㼙㼙䚸ཌ䛥 㻞㻟㻌㼙㼙 䜢ୖୗ䛻䚸୰ኸ㒊ศ䛿እᚄ 㻢㻜㻌㼙㼙䚸ෆᚄ 㻟㻢㻌㼙㼙䚸ཌ䛥 㻣㻠㻌㼙㼙 䛾䝞䝹䜽య䜢䛭䛾እ࿘䛩䜉䛶䜢ෆᚄ 㻢㻜㼙㼙㻘እᚄ 㻣㻜㼙㼙 䛾䜰䝹䝭䝸䞁䜾䛷⿵ᙉ䛧䚸☢ᴟ䛸䛧䛶ᵓᡂ䛩䜛䚹䛭䜜䜢 㻳㻹 䝟䝹䝇⟶෭෾ᶵ $,6,1359: ࢆ⏝࠸ࡓఏᑟ෭༷࡛ . ௨ୗ࡟෭༷ࡋࠊ㻺㻹㻾 ⏝ࡢ࣡࢖ࢻ࣎࢔㉸㟁ᑟ☢▼-$67(&-57& ࢆ╔☢⏝ 㻿㻯㻹 ࡜ࡋ࡚౑⏝ࡋ࡚ 㻲㻯㻹䛻䛶 㻠㻚㻣㻠㻣㻌㼀㻔㻝㻴 ඹ㬆࿘Ἴᩘ 㻞㻜㻞㻌㻹㻴㼦㻕䛻╔☢䛧䛯ࠋࣂࣝࢡ☢
▼ෆ㒊࡟ᙧᡂࡉࢀࡿᆒ୍☢ሙࢆ 㻺㻹㻾 ィ ࡟⏝࠸ࡽࢀࡿࡼ
࠺࡟ࠊ┿✵ᐜჾෆ㒊࡟タ⨨ࡉࢀࡓࣂࣝࢡ☢ᴟࡢෆᚄ㒊ศ࡟ᑐࡋ࡚ᐊ ✵㛫࣎࢔ᚄ PPࠊ㛗ࡉ PP ࡢ࢔࣑ࣝࣇࣛ
ࣥࢪࢆᕪࡋ㎸ࡴࠋࡇࡢᐊ ࣎࢔✵㛫࡟እᚄ PPࠊෆᚄPP ࡢᐊ ࢩ࣒ࢥ࢖ࣝ㸦⿵ṇ㡯㸸===;<=;=<;<;<㸧࡜ࠊ┤ᚄ PP ࡢ 㻺㻹㻾 ヨᩱ⟶䜢ᅇ㌿䛩䜛䝇䝢䝘䞊௜䛝䛾 㻾㻲 䝁䜲䝹䠄㻝㻴 ほ ⏝䛸☢ሙ䝻䝑䜽⏝䛾 㻞㻰 ほ 䠅䜢⤌䜏㎸䜣䛰㻔㻲㼕㼓㻚㻝㻕䚹䛭䛧䛶䚸ಙྕ䜢᳨ฟ䛩䜛 㻾㻲 䝁䜲䝹㒊ศ䛾እᚄ䜢㻠㻌 㼙㼙 䛻⤠䛳䛯≉ὀ䛾ヨᩱ⟶䛻䜶䝏䝹䜰䝹䝁䞊䝹䜢ධ䜜䛶䚸
ヨᩱ⟶䜢 㻟㻜㻌㻴㼦 䛷ᅇ㌿䛧䚸䝅䝮ㄪᩚ䜢⾜䛔䛺䛜䜙 㻝㻴㻌㻺㻹㻾 䛾ᐃ䜢⾜䛳䛯䚹ㄪᩚ䛾⤖ᯝ䚸䝅䞁䜾䝹䝟䝹䝇ἲ䛷䚸ඹ㬆࿘Ἴᩘ 㻞㻜㻞㻚㻜㻤㻤㻌 㻹㻴䡖䚸ほ ᖏᇦ 㻡㻌 㼗㻴㼦䚸㻥㻜㼻䝟䝹䝇ᖜ 㻞㻡㻌 䃛㼟㼑㼏㻚䛭䛧䛶⢭⟬ᅇᩘ 㻝 ᅇ䛷 㻲㼕㼓䚹㻞 䛾䝇䝨䜽䝖䝹䜢ᚓ䛯䚹䛭䛾⤖ᯝ䚸㻝㻴㻌 㧗ศゎ⬟ 㻺㻹㻾 䛻ᚲせ䛺䝇䝢䞁䜹䝑䝥䝸䞁䜾䜢᫂░䛻ほ䛷䛝䜛ศゎ⬟䜎䛷ㄪᩚ䛷䛝䜛䛣䛸䜢☜ㄆ䛧䛯䚹䛯䛰䛧䚸䜎䛰䚸䝅䝮ㄪᩚ䛻䜘䛳䛶ᅇ㌿䛻䜘䜛䝇䝢䝙䞁䜾䝃䜲䝗䝞䞁䝗䛾ᾘཤ䛜䛷䛝䛶䛔䛺䛔䚹㻌㻟䠊⪃ᐹ㻌㻱㼡㻙㻮㼍㻙㻯㼡㻙㻻 䝞䝹䜽☢▼䛻㧗ศゎ⬟ 㻺㻹㻾 䛾 ᐃ䛻ᚲせ䛺⿦⨨䠄䝅䝮䚸ヨᩱᅇ㌿䚸☢ሙ䝻䝑䜽䠅䜢⤌䜏㎸䜏䚸㻝㻴㻌㻺㻹㻾 䛾㻌㻲㼕㼓㻚㻝㻌㻼㼔㼛㼠㼛㼓㼞㼍㼜㼔㻌㼛㼒㻌㻿㼍㼙㼜㼘㼑㻌㻿㼜㼕㼚㼚㼕㼚㼓㻌㻿㼥㼟㼠㼑㼙㻌㻔㼘㼑㼒㼠㻕㻘㻌㻲㼕㼑㼘㼐㻌㻸㼛㼏㼗㻌㼍㼚㼐㻌㻿㼔㼕㼙㻌㻿㼥㼟㼠㼑㼙㻌㻔㼞㼕㼓㼔㼠㻕㻌㻌㻌㻌㻲㼕㼓㻚㻞㻌㻝㻴㻌㻺㻹㻾㻌㻿㼜㼑㼏㼠㼞㼡㼙㻌㼛㼒㻌㻱㼠㼔㼍㼚㼛㼘㻌 㻌㻾㼑㼟㼛㼚㼍㼚㼏㼑㻌㻲㼞㼑㼝㼡㼑㼚㼏㼥㻌㻦㻌㻞㻜㻞㻚㻜㻤㻤㻌㻹㻴㼦㻘㻌㻿㼣㼑㼑㼜㻌㼃㼕㼐㼠㼔㻌㻦㻌㻡㻌㼗㻴㼦㻘㻌 㻿㼍㼙㼜㼘㼑㻌 㻿㼜㼕㼚㼚㼕㼚㼓㻌 㻿㼜㼑㼑㼐㻌 㻦㻌 㻟㻜㻌 㻴㼦㻘㻌 㻭㼏㼏㼡㼙㼡㼘㼍㼠㼕㼛㼚㻌㼀㼕㼙㼑㼟㻌㻦㻌㻝㻘㻌㻥㻜r㼜㼡㼘㼟㼑㻌㼣㼕㼐㼠㼔㻌㻦㻌㻞㻡ȣ㼟㼑㼏㻚㻌
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ཧ⪃ᩥ⊩㻌
㻝㻚㻌 㼀㻚㻌 㻺㼍㼗㼍㼙㼡㼞㼍㻘㻌 㼑㼠㻌 㼍㼘㻚㻦㻌 㻯㼛㼚㼏㼑㼜㼠㻌 㼕㼚㻌 㻹㼍㼓㼚㻚㻌 㻾㼑㼟㻚㻌 㻮㻌 㻔㻹㻾㻱㻕㻌㻦㻌㻟㻝㻔㻞㻕㻌㻔㻞㻜㻜㻣㻕㻌㻢㻡㻙㻣㻜㻌㻞㻚㻌 㻿㻚㻌㻺㼍㼞㼕㼗㼕㻘㻌㼑㼠㻌㼍㼘㻚㻦㻌㻼㼔㼥㼟㼕㼏㼍㻌㻯㻌㻠㻠㻢㻤㻌㻔㻞㻜㻜㻤㻕㻌㻝㻠㻡㻝㻙㻝㻠㻡㻡㻚㻌㻥㻤㻌㻔㻞㻜㻝㻝㻕㻌㻞㻟㻠㻝㻜㻝㻌㻟㻚㻌 㻷㻚㻌㻻㼓㼍㼣㼍㻘㼑㼠㻌㼍㼘㻚㻦㻌㻭㼜㼜㼘㻚㻌㻼㼔㼥㼟㻚㻌㻸㼑㼠㼠㻘㻌㻥㻠㻚㻌 㼀㻚㻌㻺㼍㼗㼍㼙㼡㼞㼍㻘㻌㼑㼠㻚㻌㼍㼘㻚㻦㻌㻭㼎㼟㼠㼞㼍㼏㼠㼟㻌㼛㼒㻌㻯㻿㻶㻌㻯㼛㼚㼒㼑㼞㼑㼚㼏㼑㻘㻌㼂㼛㼘㻚㻌㻥㻜㻌㻔㻞㻜㻝㻠㻕㻌㼜㻚㻝㻣㻌㻡㻚㻌 㼀㻚㻌㻺㼍㼗㼍㼙㼡㼞㼍㻘㻌㼑㼠㻌㼍㼘㻚㻦㻌㻶㻚㻌㻹㼍㼓㼚㻚㻌㻾㼑㼟㼛㼚㻚㻌㻞㻞㻡㻥㻌㻔㻞㻜㻝㻡㻕㻌㻢㻤㻙㻣㻡㻌̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-p09

NMR 用バルク磁石

㻺㻹㻾 ⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾☢ሙᆒ୍ᛶྥୖ䠄䠍䠅䠉୰ኸ㒊ෆᚄᣑ኱䠉㻌㻵㼙㼜㼞㼛㼢㼑㼙㼑㼚㼠㻌㼛㼒㻌㻹㼍㼓㼚㼑㼠㼕㼏㻌㻲㼕㼑㼘㼐㻌㻴㼛㼙㼛㼓㼑㼚㼑㼕㼠㼥㻌㼕㼚㻌㼍㻌㻮㼛㼞㼑㻌㼛㼒㻌㻺㻹㻾㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㻮㼡㼘㼗㻌㻹㼍㼓㼚㼑㼠㻌㻔㻝㻕㻌㻙㻌㻱㼒㼒㼑㼏㼠㻌㼛㼒㻌㻱㼤㼜㼍㼚㼟㼕㼛㼚㻌㼛㼒㻌㻵㼚㼚㼑㼞㻌㻰㼕㼍㼙㼑㼠㼑㼞㻌㼕㼚㻌㼍㻌㻯㼑㼚㼠㼞㼍㼘㻌㻼㼍㼞㼠㻌㼛㼒㻌㼍㻌㻮㼡㼘㼗㻌㻮㼛㼞㼑㻌㻙㻌ఀ⸨㻌 ెᏕ䠈ᰗ㻌 㝧௓䠈ྜྷᕝ㻌 㞞❶䠄䜲䝮䝷ᮦ◊䠅䠗௰ᮧ㻌 㧗ᚿ䠄⌮◊䠅㻌㻵㼀㻻㻴㻌㼅㼛㼟㼔㼕㼠㼍㼗㼍㻘㻌㼅㻭㻺㻭㻳㻵㻌㼅㼛㼡㼟㼡㼗㼑㻘㻌㼅㻻㻿㻴㻵㻷㻭㼃㻭㻌㻹㼍㼟㼍㼍㼗㼕㻌㻔㻵㻹㻾㻭㻌㻹㻭㼀㻱㻾㻵㻭㻸㻕㻧㻌㻺㻭㻷㻭㻹㼁㻾㻭㻌㼀㼍㼗㼍㼟㼔㼕㻌㻔㻾㻵㻷㻱㻺㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼥㻙㼕㼠㼛㼔㻬㼍㼕㻙㼕㻚㼍㼕㼟㼕㼚㻚㼏㼛㻚㼖㼜㻌㻝䠊䛿䛨䜑䛻㻌
ᡃ䚻䛿䚸㉸㟁ᑟ䝞䝹䜽䜢⏝䛔䛯ᑠᆺ↓෭፹䛾 㻺㻹㻾 ⏝㉸㟁ᑟ☢▼䛾㛤Ⓨ䜢⾜䛳䛶䛔䜛㼇㻝㼉䚹㻺㻹㻾 ⏝☢▼䛻䛿 㼜㼜㼙 䜸䞊䝎䛾㧗䛔☢ሙᆒ୍ᛶ䛜ᚲせ䛷䛒䜛䛜䚸༳ຍ☢ሙ䛾ᆒ୍໬䛸෭༷䞉ῶ☢㐣⛬䛷䛾☢ሙᆒ୍ᛶ䛾⥔ᣢ䛻䛴䛔䛶ゎᯒⓗ䞉ᐇ㦂ⓗ᳨ウ䜢⾜䛳䛯⤖ᯝ䚸෇⟄≧䛾㉸㟁ᑟ䝞䝹䜽䛾ᐊ 䝪䜰ෆ䛻 㻝㼜㼜㼙 ௨ୗ䛾ᆒ୍☢ሙⓎ⏕䛻ᡂຌ䛧䛯㼇㻞㼉䚹ᮏⓎ⾲䛷䛿䚸䛣䛾ෆ䚸༳ຍ☢ሙ䛾ᆒ୍໬䛻䛴䛔䛶ሗ࿌䛩䜛䚹㻌෇⟄ᙧ≧䛾 㻾㻱䠄㻾㻱䠖ᕼᅵ㢮ඖ⣲䠅⣔㉸㟁ᑟ䝞䝹䜽䜢㟼☢
ሙ╔☢䠄㻲㻯䠅䛩䜛㝿䚸㼀㼏 ௨ୖ䛷ᆒ୍䛺☢ሙ䜢༳ຍ䛧䛶䜒䝞䝹䜽䛾ᖖ☢ᛶ☢໬䛻䜘䜚༳ຍ☢ሙศᕸ䛜஘䜜䚸╔☢ᚋ䛾䝪䜰ෆ䛾☢ሙᆒ୍ᛶ䛜పୗ䛩䜛䚹䛭䛣䛷䚸䝪䜰୰ኸ㒊䛾ෆᚄ䜢㒊ศⓗ䛻ᣑ኱䛧䚸䝞䝹䜽୧➃䛻⌧䜜䜛☢ᴟ䛻䜘䜛☢ሙศᕸ䛾஘䜜䜢୰ኸᣑ኱㒊୧➃䛾☢ᴟ䛻䜘䜛☢ሙ䛷䜻䝱䞁䝉䝹䛧䝪䜰୰ኸ㒊䛾༳ຍ☢ሙ䜢ᆒ୍໬䛩䜛䛣䛸䜢ヨ䜏䛯䚹㻌㻞䠊ゎᯒ᪉ἲ㻌㻼㻴㻻㼀㻻㻙㻱㼐㼐㼥䠄䞞䝣䜷䝖䞁 㼂㼑㼞㻚㻌 㻢㻚㻠䠅䜢⏝䛔䚸㻝㻛㻞 ஧ḟඖ㍈ᑐ⛠䝰䝕䝹䛷㟁☢⏺ゎᯒ䜢⾜䛳䛯䚹㻲㼕㼓㻚㻌 㻝 䛻ྠᚄ䝪䜰䠄㼀㼥㼜㼑㻌㻭䠅䛸୰ኸᣑ኱䝪䜰䠄㼀㼥㼜㼑㻌㻮䠅䛾ゎᯒ䝰䝕䝹䜢♧䛩䚹䝞䝹䜽䛿䚸እᚄ 㻢㻜㼙㼙㻘㻌 ෆᚄ 㻞㻤㼙㼙㻘㻌 㧗䛥 㻝㻞㻜㼙㼙 䛷䚸㼀㼥㼜㼑㻌㻮 䛷䛿䝪䜰୰ኸ㒊䛾ෆᚄ䃥㼐䚸ෆ㧗 㼔 䜢䝟䝷䝯䞊䝍䛸䛧䚸༳ຍ☢ሙ䛜ᆒ୍䛸䛺䜛䜘䛖᭱㐺໬䜢⾜䛳䛯䚹㻳㼐 ⣔䝞䝹䜽䛷䛾 㻠㻜㻷䚸㻲㻯㻡㼀 䛾╔☢
䜢᝿ᐃ䛧䚸㻮㼑㼍㼚 䝰䝕䝹䛷䛾 㻶㼏 䜢 㻢㻚㻜㽢㻝㻜㻤㻭㻛㼙㻞䚸ẚ㏱☢⋡䃛㼞䜢 㻝㻚㻜㻝䠄㻝㻜㻜㻷䠅䛸䛧䛯㼇㻝㼉䚹㻌㻲㼕㼓㻚㻌㻝㻌㻭㼚㼍㼘㼥㼟㼕㼟㻌㼙㼛㼐㼑㼘㻌㼛㼒㻌㻿㻯㻌㼎㼡㼘㼗㼟㻌㼣㼕㼠㼔㼛㼡㼠㻌㻔㼠㼥㼜㼑㻌㻭㻕㻌㼍㼚㼐㻌㼣㼕㼠㼔㻌㻔㼠㼥㼜㼑㻌㻮㻕 㼕㼚㼚㼑㼞㻌㼐㼕㼍㼙㼑㼠㼑㼞㻌㼑㼤㼜㼍㼚㼟㼕㼛㼚㻌㼕㼚㻌㼠㼔㼑㻌㼏㼑㼚㼠㼑㼞㻌㼛㼒㻌㼍㻌㼎㼛㼞㼑㻚㻟䠊⤖ᯝ䛸⪃ᐹ㻌ึ䜑䛻 㼀㼥㼜㼑㻌 㻭 䛻䛴䛔䛶 㻲㻯㻡㼀 ╔☢ᚋ䛾䝞䝹䜽ෆ䛾㟁ὶศᕸ䜢ㄪ䜉䛯䚹䝞䝹䜽䛾㧗䛥᪉ྥ୰ኸ䛷䛾㟁ὶ㡿ᇦ䠄㻶㻩㻶㼏䠅䛿䚸䝞䝹䜽እ࿘䛛䜙 㻤㼙㼙 䛷䛒䛳䛯䚹䛣䛾⤖ᯝ䛛䜙ෆᚄᣑ኱㒊䛜㟁ὶ㡿ᇦ䛻᥃䛛䜙䛺䛔䜘䛖䛻 㼐㻩㻟㻢㼙㼙 䛸䛧䛶 㼔 䜢᭱㐺໬䛧䛯᫬䛾䝪䜰୰ኸ㒊䛾☢ሙศᕸ䜢 㻲㼕㼓㻚㻌 㻞 䛻♧䛩䚹䝪䜰୰ኸ㒊䛾ᣑ኱䛻䜘䜚䚸༳ຍ☢ሙ䠄䕿䚸䕻䠅䛾ᆒ୍㡿ᇦ䛿䡖᪉ྥ䛸䡎᪉ྥ䛻ᗈ䛜㻲㼕㼓㻚㻌 㻞㻌 㻯㼍㼘㼏㼡㼘㼍㼠㼑㼐㻌 㼐㼕㼟㼠㼞㼕㼎㼡㼠㼕㼛㼚㼟㻌 㼛㼒㻌 㼍㼜㼜㼘㼕㼑㼐㻌 㼒㼕㼑㼘㼐㻌 㻮㼍㻌 㼍㼚㼐㻌 㼠㼞㼍㼜㼜㼑㼐㻌䜚䚸䛭䜜䛻ᑐᛂ䛧䛶ᤕᤊ☢ሙ䠄䖃䚸䕺䠅䛾ᆒ୍㡿ᇦ䜒ᗈ䛜䛳䛶㼒㼕㼑㼘㼐㻌㻮㼠㻌㼍㼘㼛㼚㼓㻌㻔㼍㻕㻌㼠㼔㼑㻌㼦㻙㼐㼕㼞㼑㼏㼠㼕㼛㼚㻌㼍㼚㼐㻌㻔㼎㻕㻌㼠㼔㼑㻌㼞㻙㼐㼕㼞㼑㼏㼠㼕㼛㼚㻚㻌䛔䜛䚹㻲㼕㼓㻚㻌 㻟 䛻䛿䚸䝪䜰୰ኸ㒊඲య䛾༳ຍ☢ሙศᕸ䜢♧䛩䚹㼼㻝㼜㼜㼙 䛾ᆒ୍㡿ᇦ䠄◚⥺䠅䛿䚸䝪䜰ᣑ኱䛺䛧䃥㻠㽢㻸㻞 䛻ᑐ䛧䚸ᣑ኱䛒䜚䃥㻞㻣㽢㻸㻞㻟 䛸䛺䜛䛾䛜ศ䛛䜛䚹㻌ᮏゎᯒ䛷⾜䛳䛯䝪䜰୰ኸ㒊ᣑ኱䛻䜘䜛༳ຍ☢ሙᆒ୍໬䛾ᡭἲ䛿䝞䝹䜽䛾ᙧ≧䛻౫Ꮡ䛧☢໬䛾኱䛝䛥䛻䛿౫Ꮡ䛧䛺䛔䛯䜑䚸䝞䝹䜽䛾✀㢮䜔 ᗘ䛻䜘䛳䛶䃛㼞 䛜ኚ໬䛧䛶䜒᭷ຠ䛻ᶵ⬟䛩䜛䛸⪃䛘䜙䜜䜛䚹㻌㻠䠊䜎䛸䜑㻌
㟁☢⏺ゎᯒ䛾⤖ᯝ䚸෇⟄≧㉸㟁ᑟ䝞䝹䜽䛾䝪䜰୰ኸ㒊䜢ᣑ኱䛩䜛䛣䛸䛻䜘䜚䝞䝹䜽䛾ᖖ☢ᛶ☢໬䛻䜘䜛☢ሙศᕸ䛾஘䜜䜢⿵ṇ䛧䚸䝪䜰ෆ༳ຍ☢ሙ䜢ᆒ୍໬䛷䛝䜛䛣䛸䛜ศ䛛䛳䛯䚹㻌ᮏ◊✲䛾୍㒊䛿䚸ᅜ❧◊✲㛤Ⓨἲே᪥ᮏ་⒪◊✲㛤Ⓨᶵᵓ䠄㻭㻹㻱㻰䠅䛾་⒪ศ㔝◊✲ᡂᯝᒎ㛤஦ᴗ䠄ඛ➃ィ ศᯒᢏ⾡䞉ᶵჾ㛤Ⓨ䝥䝻䜾䝷䝮䠅䛷ᐇ᪋䛧䛯䜒䛾䛷䛒䜛䚹㻌ཧ⪃ᩥ⊩㻌㻝㻚 㼀㻚㻌㻺㼍㼗㼍㼙㼡㼞㼍㻘㻌㼑㼠㻌㼍㼘㻚㻦㻌㻶㻚㻌㻯㼞㼥㼛㻚㻌㻿㼛㼏㻚㻌㻶㼜㼚㻚㻌㻠㻠㻢㻌㻔㻞㻜㻝㻝㻕㻌㻝㻟㻥㻌㻙㻌㻝㻠㻤㻞㻚 㼅㻚㻌㼅㼍㼚㼍㼓㼕㻘㻌㼅㻚㻌㻵㼠㼛㼔㻘㻌㻹㻚㻌㼅㼛㼟㼔㼕㼗㼍㼣㼍㻌㼍㼚㼐㻌㼀㻚㻌㻺㼍㼗㼍㼙㼡㼞㼍㻦㻌㻭㼎㼟㼠㼞㼍㼏㼠㼟㻌㼛㼒㻯㻿㻿㻶㻌㻯㼛㼚㼒㼑㼞㼑㼚㼏㼑㻌㻥㻥㻞㻌㻔㻞㻜㻝㻡㻕㻌㻝㻯㻙㼜㻝㻜㻲㼕㼓㻚㻌㻟㻌㻭㼚㼍㼘㼥㼟㼕㼟㻌㼞㼑㼟㼡㼘㼠㼟㻌㼛㼒㻌㼍㼜㼜㼘㼕㼑㼐㻌㼒㼕㼑㼘㼐㻌㼐㼕㼟㼠㼞㼕㼎㼡㼠㼕㼛㼚㻌㼕㼚㻌㼍㻌㼎㼡㼘㼗㻌㼎㼛㼞㼑㻚㻌̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-p10NMR 用バルク磁石

㻺㻹㻾 ⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾☢ሙᆒ୍ᛶྥୖ䠄䠎䠅ෆᤄ㉸㟁ᑟ෇⟄㻌㻵㼙㼜㼞㼛㼢㼑㼙㼑㼚㼠㻌㼛㼒㻌㻹㼍㼓㼚㼑㼠㼕㼏㻌㻲㼕㼑㼘㼐㻌㻴㼛㼙㼛㼓㼑㼚㼑㼕㼠㼥㻌㼕㼚㻌㼍㻌㻮㼛㼞㼑㻌㼛㼒㻌㻺㻹㻾㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㻮㼡㼘㼗㻌㻹㼍㼓㼚㼑㼠㻌㻔㻞㻕㻌㻙㻌㻱㼒㼒㼑㼏㼠㻌㼛㼒㻌㻵㼚㼟㼑㼞㼠㼕㼛㼚㻌㼛㼒㻌㻴㼀㻿㻌㼏㼥㼘㼕㼚㼐㼑㼞㻌㼕㼚㼠㼛㻌㼍㻌㻮㼡㼘㼗㻌㻮㼛㼞㼑㻌㻌ᰗ㻌 㝧௓㻘㻌 ఀ⸨㻌 ెᏕ㻘㻌 ྜྷᕝ㻌 㞞❶䠄䜲䝮䝷ᮦ◊䠅䠗௰ᮧ㻌 㧘ᚿ䠄⌮໬Ꮫ◊✲ᡤ䠅㻌㼅㻭㻺㻭㻳㻵㻌㼅㼛㼡㼟㼡㼗㼑㻘㻌㻵㼀㻻㻴㻌㼅㼛㼟㼔㼕㼠㼍㼗㼍㻘㻌㼅㻻㻿㻴㻵㻷㻭㼃㻭㻌㻹㼍㼟㼍㼍㼗㼕㻌㻔㻵㻹㻾㻭㻌㻹㻭㼀㻱㻾㻵㻭㻸㻕䠗㻺㻭㻷㻭㻹㼁㻾㻭㻌㼀㼍㼗㼍㼟㼔㼕㻌㻔㻾㻵㻷㻱㻺㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼥㼍㼚㼍㼓㼕㻬㼍㼕㻙㼕㻚㼍㼕㼟㼕㼚㻚㼏㼛㻚㼖㼜㻌㻌䜎䛷ὶ䜜䜛ୖୗ➃䛾䝞䝹䜽䛾㏆ഐ䛷ຠᯝ䛜኱䛝䛔䜒䛾䛸⪃䛘㻝䠊䛿䛨䜑䛻㻌
䛶䛔䜛䚹ᕳ䛝ᩘ䜢ቑ䜔䛩䛣䛸䛷ຠᯝ䛜ቑ䛩䛸ᮇᚅ䛧䛯 㻟 ᒙᕳ䛝ᡃ䚻䛿䚸㉸㟁ᑟ䝞䝹䜽䜢⏝䛔䛯ᑠᆺ↓෭፹䛾 㻺㻹㻾 ⏝㉸㻝㻞㻡㻌㼙㼙 䛾෇⟄䛒䜚䛷᭱䜒㧗䛔☢ሙᆒ୍ᛶ 㻜㻚㻠㻡㻌㼜㼜㼙 䛜ᚓ䜙䜜㟁ᑟ☢▼䛾㛤Ⓨ䜢⾜䛳䛶䛔䜛㼇㻝㼉䚹ᕷ㈍⿦⨨⏝䛾 㻺㻹㻾 ⏝☢▼䛯䚹䛣䛾䛸䛝䛾 㻺㻹㻾 䝇䝨䜽䝖䝹䜢෇⟄䛾䛺䛔ሙྜ䛸㔜䛽䛶 㻲㼕㼓㻚㻌䛷䛿☢▼༢⊂䛷ᚲせ䛺㡿ᇦ䛻 㻝㻌㼜㼜㼙 ⛬ᗘ䛾☢ሙᆒ୍ᛶ䜢᭷㻞 䛻♧䛧䛯䚹㻌
䛧䛶䛔䜛䛯䜑䚸䝞䝹䜽☢▼༢య䛷ྠ➼䛾ᆒ୍ᛶ䜢ᐇ⌧䛩䜛䛣䛸䛜┠ᶆ䛸䛺䜛䚹㉸㟁ᑟ䝞䝹䜽☢▼䛷䛿ᮦᩱ䛾☢໬䛜༳ຍ☢
ሙ䛾ᆒ୍ᛶ䛻ᙳ㡪䛩䜛䛜䚸䝅䝭䝳䝺䞊䝅䝵䞁䛷᳨ウ䛧䛯䝞䝹䜽㻠䠊䜎䛸䜑㻌
ᙧ≧䛻䛩䜜䜀䚸㼼㻝㻌 㼜㼜㼙 ௨ୗ䛾☢ሙᆒ୍ᛶ䜢ᣢ䛴㡿ᇦ䛜ᗈ୰ኸ㒊䛾䝞䝹䜽䛾ෆᚄ䜢ᣑ኱䛧䛯෇⟄≧䛾✚ᒙ㉸㟁ᑟ䝞䛔⠊ᅖ䛻䛷䛝䜛䛣䛸䛜♧䛥䜜䛯㼇㻞㼉䚹䛧䛛䛧䚸ᙧ≧䜢ᨵⰋ䛧䛯㉸䝹䜽䛾ෆഃ䛻㉸㟁ᑟ෇⟄䜢ෆᤄ䛩䜛䛣䛸䛻䜘䜚䚸ᐊ 䝪䜰ෆ㟁ᑟ䝞䝹䜽☢▼䜢ᐇ㝿䛻╔☢䛧䛯䛸䛣䜝䚸☢ሙᆒ୍ᛶ䛿ྥୖ䛷༳ຍ䛧䛯☢ሙ䛸ྠ➼䛾 㻝㻌 㼜㼜㼙 ௨ୗ䛾ᆒ୍ᛶ䜢ಖ䛳䛶╔☢
䛧䛯䛜 㻝㻥㻚㻠㻌㼜㼜㼙䠄ホ౯㡿ᇦ䃥㻢㻚㻥㽢㻸㻝㻜䠅䛷䛒䛳䛯䚹䝞䝹䜽㉸㟁䛩䜛䛣䛸䛜䛷䛝䚸෇⟄≧䛾㉸㟁ᑟ䝞䝹䜽☢▼䛷 105 ⏝☢▼࡜ᑟయ䛿䚸䛭䛾స〇ἲୖ䚸୙⣧≀䜔Ḟ㝗➼䜢ྵ᭷䛩䜛䛯䜑䚸䛭ࡋ࡚ᚲせ࡜ࡉࢀࡿ☢ሙᆒ୍ᛶࢆᚓࡿࡇ࡜ࡀ࡛ࡁࡓ䚹䜜䜙䛜ཎᅉ䛷㟼☢ሙ╔☢䛾ῶ☢㐣⛬䛷䝞䝹䜽ෆ䛻⏕䛨䜛㉸ᮏ◊✲䛾୍㒊䛿䚸ᅜ❧◊✲㛤Ⓨἲே᪥ᮏ་⒪◊✲㛤Ⓨ㟁ᑟ㟁ὶ䛾ศᕸ䛜஘䜜䚸☢ሙ䛜୙ᆒ୍䛻䛺䜛䛸⪃䛘䜙䜜䜛䚹ᶵᵓ䠄㻭㻹㻱㻰䠅䛾་⒪ศ㔝◊✲ᡂᯝᒎ㛤஦ᴗ䠄ඛ➃ィ ศᯒ䛭䛾ᑐ⟇䛸䛧䛶䚸෇⟄≧䛾✚ᒙ䝞䝹䜽䛾ෆഃ䛻䚸෇⟄䛾ᚄ᪉ᢏ⾡䞉ᶵჾ㛤Ⓨ䝥䝻䜾䝷䝮䠅䛷ᐇ᪋䛧䛯䜒䛾䛷䛒䜛䚹㻌ྥ䛻 㼏 ㍈㓄ྥ䛧䚸䝞䝹䜽䜘䜚 㻶㼏 䛾㧗䛔 㻾㻱㻝㻞㻟 ⣔㉸㟁ᑟⷧ⭷䛾㻌෇⟄䜢㓄䛩䜛䛣䛸䜢⪃䛘䛯䚹ෆᤄ㉸㟁ᑟ෇⟄䜢ᑟධ䛩䜜䜀䚸Sample tube㻌ῶ☢㐣⛬䛷෇⟄ෆ䛻ㄏ㉳䛥䜜䜛㉸㟁ᑟ㟁ὶ䛻䜘䜚䛭䛾ෆഃ㻌Vacuum chamber
NMR probe䛾☢ሙศᕸ䛜⥔ᣢ䛥䜜䜛䛸ᮇᚅ䛧䛯䚹ᐇ㦂䛷᳨ド䛧䛯䛸䛣䜝䚸㻌ෆᤄ㉸㟁ᑟ෇⟄䛷☢ሙᆒ୍ᛶ䛜኱䛝䛟ྥୖ䛧䚸ᐊ 䝪䜰ෆ㻌䛷 㻝㻌㼜㼜㼙 ௨ୗ䛾☢ሙᆒ୍ᛶ䛜ᚓ䜙䜜䛯䛾䛷ሗ࿌䛩䜛䚹㻌㻌㻌㻌㻞䠊ᐇ㦂᪉ἲ㻌㻌ᐇ㦂࡟⏝࠸ࡓ 105 ⏝෇⟄≧㉸㟁ᑟࣂࣝࢡ☢▼ࡢᵓᡂࢆ㻌
)LJ ࡟♧ࡍࠋࣂࣝࢡࡢእᚄࡣ඲࡚ PPࠊෆᚄࡣୖୗ
Bulk Supercunductor㻌➃ࡀ PPࠊ୰ኸࡢ  ಶࡣ PP ࡛ࠊィ  ಶࡢࣂࣝࢡࡢ✚(EuBaCuO)㻌
120 mmᒙ㧗ࡉࡣ PP ࡛࠶ࡿࠋࡇࡢ✚ᒙࣂࣝࢡࡢෆഃ࡟ෆᤄ㉸㻌㟁ᑟ෇⟄ࢆ㓄ࡋࠊࣂࣝࢡ࡜୍⥴࡟෭༷ࡍࡿᵓᡂ࡜ࡋࡓࠋ
㻌Sample䠄H2O䠅
෇⟄≧ࡢⷧ⭷ࡢస〇ࡣᅔ㞴࡞ࡓࡵࠊ㻝㻜㻜㻌㼙㼙㻘㻌㻝㻝㻤㻌㼙㼙㻘㻌㻝㻞㻡㻌㻌
䃥6.9㽢L10㼙㼙 䛾㖡ࡢ࣎ࣅࣥ࡟ᖜ PP ࡢ *G%&2 ࡢࢸ࣮ࣉ⥺ᮦ㸦㸦ᰴ㸧㻌or 䃥4.2㽢L6
ࣇࢪࢡࣛ〇)<6&6&㸧ࢆࢫࣃ࢖ࣛࣝ࡟  ᒙᕳ࠸ࡓ෇⟄㻌ࢆస〇ࡋࡓࠋPP ࡢ࣎ࣅ࡛ࣥࡣࠊ୧➃ࡢ PP ࡎࡘ࡟HTS Cylinder㻌 ᒙᕳ࠸ࡓࡶࡢ࠾ࡼࡧ඲㛗࡟  ᒙᕳ࠸ࡓࡶࡢࡶస〇ࡋࡓࠋ
Cold stage☢ᴟࡢෆഃ࡟ࡣȭPP ࡢᐊ ✵㛫ࢆ☜ಖࡋࠊᑓ⏝ࡢ 105ࣉ࣮ࣟࣈࢆᤄධࡍࡿࠋȭ/PP ࡞࠸ࡋȭ/PP
Fig. 1 Schematic illustration of the Superconducting Bulk
Magnet with HTS cylinderࡢ㡿ᇦ࡟Ỉࢆ඘ሸࡋࡓヨᩱ⟶ࢆ 105ࣉ࣮ࣟࣈ࡟ᤄධࡋࠊ
ᚓࡽࢀࡓ + ࡢ 105 ಙྕࡢ್༙ᖜ࡛☢ሙᆒ୍ᛶࢆホ౯ࡋࡓࠋFWHM㻌╔☢䛿 㻺㻹㻾 ⏝䛾㉸㟁ᑟ䝬䜾䝛䝑䝖䜢⏝䛔䛶☢ሙ୰෭༷ἲ
0.45 ppm
㻌䛷⾜䛳䛯䚹☢ᴟ䜢 㻠㻚㻣㻌㼀 䛻ບ☢䛧䛯╔☢⏝䝬䜾䝛䝑䝖䛾ᐊ 䝪㻌䜰ෆ䛻ධ䜜䛯≧ែ䛷䝞䝹䜽䛜㉸㟁ᑟ䛻䛺䜛┤ୖ䛾 㻝㻜㻜㻌 㻷 䛻㻌ಖ䛱䚸㻺㻹㻾 ⏝㉸㟁ᑟ䝬䜾䝛䝑䝖䛻௜ᖏ䛩䜛㉸㟁ᑟ䝅䝮䛾ㄪᩚ
㻌With HTS Cylinder䜢⾜䛳䛶ヨᩱ㡿ᇦ䛷䛾༳ຍ☢ሙ䛾ᆒ୍ᛶ䜢 㻝㻌 㼜㼜㼙 ௨ୗ䛻䛧
㻌㸦125 mm 3 layers㸧䛯䚹䛭䛾ᚋ䚸㻡㻜㻌㻷 䜎䛷☢ᴟ䜢෭༷䛧䚸ḟ䛔䛷╔☢⏝䝬䜾䝛䝑䝖
19.4 ppm
㻌䜢ῶ☢䛧䛶☢ᴟ䜢╔☢䛧䛯䚹╔☢ᚋ䛾☢ሙᆒ୍ᛶ䛻䛴䛔䛶䚸㻌෇⟄ࡢ࡞࠸ሙྜ࡜✀ࠎࡢ෇⟄ࡀ࠶ࡿሙྜ࡜࡛ẚ㍑ࡋࡓࠋ㻌
20 ppmWithout HTS Cylinder㻌㻌㻌㻟䠊⤖ᯝ䛚䜘䜃⪃ᐹ㻌
Fig. 2 1H NMR spectra of H2O with and without HTS cylinderึ䜑䛻 㻝㻜㻜㻌㼙㼙 䛾෇⟄䜢ㄪ䜉䛯䛸䛣䜝䚸㻣㻚㻡㻌㼜㼜㼙 䛸෇⟄䛺䛧㻌䛾䛸䛝䛾 㻤㻚㻤㻌㼜㼜㼙㻔䛔䛪䜜䜒ホ౯㡿ᇦȭ/PP㻕䜘䜚☢ሙᆒཧ⪃ᩥ⊩㻌୍ᛶ䛜ྥୖ䛧䛯䚹෇⟄㛗䛥 㻝㻝㻤㻌㼙㼙 䛚䜘䜃 㻝㻞㻡㻌㼙㼙 䛷䛿䛥䜙䛻
1. T. Nakamura, et al.: J. Cryo. Soc. Jpn. 46 (2011) 139 – 148☢ሙᆒ୍ᛶ䛜ྥୖ䛧䚸䝞䝹䜽䛾඲㧗䛻㏆䛔㛗䛥䛾෇⟄䛜䜘䜚
2. Y. Itoh, Y. Yanagi, M. Yoshikawa and T. Nakamura:᭷ຠ䛺䛣䛸䛜䜟䛛䛳䛯䚹䜎䛯䚸୧➃䛾䜏䛾෇⟄䛷 㻝㻜㻜㻌 㼙㼙 䜘䜚
Abstracts of CSSJ Conference 92 (2015) 1C-p9㻌
☢ሙᆒ୍ᛶ䛜Ⰻ䛛䛳䛯䛣䛸䛛䜙䚸㉸㟁ᑟ㟁ὶ䛜䝞䝹䜽䛾ෆ࿘̿̿

第92回

2015年度秋季低温工学・超電導学会

1C-p11

NMR 用バルク磁石

㻺㻹㻾 ⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾☢ሙᆒ୍ᛶ䛻ཬ䜌䛩䝞䝹䜽Ḟ㝗఩⨨䛾ᙳ㡪㻌㻵㼚㼒㼘㼡㼑㼚㼏㼑㻌㼛㼒㻌㻰㼑㼒㼑㼏㼠㻌㻼㼛㼟㼕㼠㼕㼛㼚㻌㼕㼚㻌㼍㻌㻮㼡㼘㼗㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼛㼞㻌㼛㼚㻌㻹㼍㼓㼚㼑㼠㼕㼏㻌㻲㼕㼑㼘㼐㻌㻴㼛㼙㼛㼓㼑㼚㼑㼕㼠㼥㻌 㻌㼕㼚㻌㼍㻌㻮㼛㼞㼑㻌㼛㼒㻌㻺㻹㻾㻌㻿㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㻮㼡㼘㼗㻌㻹㼍㼓㼚㼑㼠㻌5 5 5 5555

5

5 5 5 55䏓㻮㻛㻮㻜㻌㻔 㼜㼜 㼙㻕㻌㼞㻌 㻩㻌㻜㻩㻌 㻜䏓 㻮㻛㻮㻜㻌㻔 㼜㼜㼙㻕㻌㼞㻌㻩㻌㻜㼜㼜 㼙㻕㻌㼞㻌㻩㻌㻜

120

5

㻌
ఀ⸨㻌 ెᏕ䠈ྜྷᕝ㻌 㞞❶䠈ᰗ㻌 㝧௓䠄䜲䝮䝷ᮦ◊䠅䠗⸨௦㻌 ༤அ䠄ᒾᡭ኱䠅䠗௰ᮧ㻌 㧗ᚿ䠄⌮◊䠅㻌㻵㼀㻻㻴㻌㼅㼛㼟㼔㼕㼠㼍㼗㼍㻘㻌㼅㻻㻿㻴㻵㻷㻭㼃㻭㻌㻹㼍㼟㼍㼍㼗㼕㻘㻌㼅㻭㻺㻭㻳㻵㻌㼅㼛㼡㼟㼡㼗㼑㻌㻔㻵㻹㻾㻭㻌㻹㻭㼀㻱㻾㻵㻭㻸㻕㻧㻌㻲㼁㻶㻵㻿㻴㻵㻾㻻㻌㻴㼕㼞㼛㼥㼡㼗㼕㻌㻔䠥䡓䠽䡐䡁㻌 㼁㼚㼕㼢㻚㻕㻧㻌㻺㻭㻷㻭㻹㼁㻾㻭㻌㼀㼍㼗㼍㼟㼔㼕㻌㻔㻾㻵㻷㻱㻺㻕㻌㻱㻙㼙㼍㼕㼘㻦㻌㼥㻙㼕㼠㼛㼔㻬㼍㼕㻙㼕㻚㼍㼕㼟㼕㼚㻚㼏㼛㻚㼖㼜㻌㻌z SC Bulk (䃛r = 1)㻝䠊䛿䛨䜑䛻㻌
Defect C Defect D
J = Jc zz㼜㼜㼙 䜸䞊䝎䛾☢ሙᆒ୍ᛶ䛜せồ䛥䜜䜛 㻺㻹㻾 ⏝☢▼䛻㉸
60
60
㟁ᑟ䝞䝹䜽䜢⏝䛔䜛ሙྜ䚸䝞䝹䜽䛻ෆᅾ䛩䜛Ḟ㝗䛜䝞䝹䜽䛾
Defect B 6 6 6Ⓨ⏕☢ሙ䛾ᆒ୍ᛶ䛻኱䛝䛟ᙳ㡪䛩䜛䛸⪃䛘䜙䜜䜛䚹䛭䛣䛷䚸㟁J =0☢⏺ゎᯒ䛻䜘䜚䚸෇⟄≧㉸㟁ᑟ䝞䝹䜽䛾ྛ఩⨨䛾Ḟ㝗䛜╔r☢ᚋ䛾䝞䝹䜽䝪䜰ෆ䛾☢ሙᆒ୍ᛶ䛻ཬ䜌䛩ᙳ㡪䜢ㄪ䜉䛯䚹㻌30㻌㻞䠊ゎᯒ᪉ἲ㻌㟁☢⏺ゎᯒ䛿䚸㻼㻴㻻㼀㻻㻙㻱㼐㼐㼥䠄䞞䝣䜷䝖䞁 㼂㼑㼞㻚㻌㻢㻚㻠䠅䜢⏝䛔䚸
6
Defect A a1 a2 a3
6
㻝㻛㻞 ஧ḟඖ㍈ᑐ⛠䝰䝕䝹䛷⾜䛳䛯䚹෇⟄≧㉸㟁ᑟ䝞䝹䜽㻔እ
r
r
30
30
22
20
22
0
14
0
14
䃥28
䃥
ᚄ 㻢㻜㻌 㼙㼙䚸ෆᚄ 㻞㻤㼙㼙䚸㧗䛥 㻝㻞㻜㼙㼙㻕䛾ྛ㒊䛻 㻶㼏㻩㻜 䛾Ḟ㝗䜢䃥60䃥㻌ᙧᡂ䛧䚸㟼☢ሙ╔☢䠄㻲㻯䠅䛧䛯᫬䛾䝞䝹䜽ෆ䛾㟁ὶศᕸ䚸䝪㻲㼕㼓㻚㻌㻝㻌㻭㼚㼍㼘㼥㼟㼕㼟㻌㼙㼛㼐㼑㼘㻌㼛㼒㻌㻿㻯㻌㼎㼡㼘㼗㻌㼣㼕㼠㼔㻌㼐㼕㼒㼒㼑㼞㼑㼚㼠㻌㼠㼥㼜㼑㼟㻌㼛㼒㻌㼐㼑㼒㼑㼏㼠㻚㻌䜰ෆ䛾☢ሙศᕸ䜢ㄪ䜉䛯䚹㻲㼕㼓㻚㻌 㻝 䛻ゎᯒ䝰䝕䝹䜢♧䛩䚹㻶㼏㻩㻜Ḟ㝗䛾఩⨨䛿䚸㻭䠖෇⟄୰ኸ㒊ᚄ᪉ྥ䚸㻮䠖෇⟄➃㠃ᚄ᪉ྥ䚸㻡㻺㼛㻌 㻰㼑㼒㼑㼏 㼠㻰㼑㼒㼑㼏㼠㻌㻭 㻴 㻝㻞 㻜㻌 㻵㻰 㻞 㻤㻘㻌 㻶㼏 㻩㻢㻱 㻤㻘㻌 䃛 㼞 㻩㻝 㻘㻌㻲 㻯 㻡㼀㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻞㻯䠖෇⟄ෆ࿘㠃㍈᪉ྥ䚸㻰䠖෇⟄እ࿘㠃㍈᪉ྥ䛾䠐㏻䜚䛷䛒䜛䚹㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻤㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻝㻞㻜㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻝㻠Ḟ㝗䝃䜲䝈䛿ᚄ᪉ྥ 㻢㼙㼙䚸㍈᪉ྥ 㻡㼙㼙 䛸䛧䚸Ḟ㝗 㻭 䛷䛿ᚄ㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻝㻡㻻㼡㼠㼑㼞㻌 㼦㻡㼞㻝㻢㻵㼚㼚㼑㼞㻌㼦㻡㼞㻢᪉ྥ䛾䝃䜲䝈䜢 㻜䡚㻝㻢㻌㼙㼙 䛷ኚ໬䛥䛫䛯䚹㻮㼑㼍㼚 䝰䝕䝹䜢⏝䛔䚸㻙㻡㻹㼕㼐㼐㼘㼑㻌㼦㻡㼞㻝㻥㻙 㻞㻡z No Defect㻤㻞㻶㼏 䛿 㻢㻚㻜㽢㻝㻜 㻭㻛㼙 䠄㻳㼐 ⣔ 㻠㻜㻷 䛷䛾䝞䝹䜽 㻶㼏䠅䡠ẚ㏱☢⋡䛿䃛㼞㻌㻙㻝㻜㻩㻝䚸╔☢䛿 㻲㻯㻌㻡㼀 䛸䛧䛯䚹㻌㻌㻙㻝㻡㻟䠊⤖ᯝ䛸⪃ᐹ㻌㻙㻞㻜㻲㼕㼓㻚㻌㻞 䛻䚸Ḟ㝗 㻭 䛾఩⨨ཬ䜃䝃䜲䝈䜢ኚ䛘䛯䛸䛝䛾㟁ὶศᕸ䛸䝪䜰ෆ䛾ᤕᤊ☢ሙศᕸ䜢♧䛩䚹䝞䝹䜽እ࿘㠃䛻Ḟ㝗䛜
㻙㻞㻡
㻜
㻜㻚㻜㻜㻡
㻜㻚㻜㻝
㻜㻚㻜㻝㻡
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第92回

2015年度秋季低温工学・超電導学会

1C-p12

NMR 用バルク磁石

㻺㻹㻾 ⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䜈䛾㉸㟁ᑟ෇⟄ෆᤄຠᯝ䛾㻌䝅䝭䝳䝺䞊䝅䝵䞁ゎᯒ㻌㻺㼡㼙㼑㼞㼕㼏㼍㼘㻌㼟㼕㼙㼡㼘㼍㼠㼕㼛㼚㻌㼒㼛㼞㻌㼠㼔㼑㻌㼕㼚㼟㼑㼞㼠㼕㼛㼚㻌㼑㼒㼒㼑㼏㼠㻌㼛㼒㻌㻴㼀㻿㻌㼏㼥㼘㼕㼚㼐㼑㼞㻌㼕㼚㼠㼛㻌㼠㼔㼑㻌㼎㼛㼞㼑㻌 㻌㼛㼒㻌㻺㻹㻾㻌㼟㼡㼜㼑㼞㼏㼛㼚㼐㼡㼏㼠㼕㼚㼓㻌㼎㼡㼘㼗㻌㼙㼍㼓㼚㼑㼠㻌⸨௦㻌 ༤அ䠄ᒾᡭ኱䠅䠗ఀ⸨㻌 ెᏕ, ᰗ㻌 㝧௓䠄䜲䝮䝷ᮦ◊䠅䠗௰ᮧ㧘ᚿ䠄⌮◊䠅
FUJISHIRO Hiroyuki (Iwate Univ.); ITOH Yoshitaka, YANAGI Yousuke (IMRA Material); NAKAMURA Takashi (RIKEN)
E-mail: fujishiro@iwate-u.ac.jp㻌㻝䠊䛿䛨䜑䛻㻌
䝁䞁䝟䜽䝖䛷ᐮ๣୙せ䛺 NMR ⏝෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾㛤Ⓨ䛜⌧ᅾ┒䜣䛻⾜䜟䜜䛶䛔䜛[1]䚹㧗ᛶ⬟ NMR ⿦⨨䜢ᐇ⌧䛩䜛䛻䛿ヨᩱ䛜Ꮡᅾ䛩䜛෇⟄✵㛫ෆ䛾㧗䛔☢ሙᆒ୍ᛶ䛜せồ䛥䜜䜛䛜䚸㉸㟁ᑟ䝞䝹䜽ᮦ䛾⤖ᬗᡂ㛗䛻㉳ᅉ䛩䜛ᮏ㉁ⓗ䛺⮫⏺㟁ὶᐦᗘ Jc ศᕸ䛾䠐ᅇᑐ⛠ᛶ䜔䚸Ḟ㝗䜔㠀㉸ఏᑟ┦ศᕸ➼䛻䜘䜛ᤕᤊ☢ሙ䛾୙ᆒ୍䛜ၥ㢟䛸䛺䜚䚸ᵝ䚻䛺ᕤኵ䛜⾜䜟䜜䛶䛔䜛䚹䛧䛛䛧䚸Ḟ㝗䛾䝃䜲䝈䜔఩⨨䛜䛹䛾⛬ᗘᤕᤊ☢ሙ䛾୙ᆒ୍䛻ᙳ㡪䛩䜛䛛䛻䛴䛔䛶䛿᫂䜙䛛䛻䛺䛳䛶䛔䛺䛔䚹᭱㏆䚸䛣䛾෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛻㧗䛔 Jc 䜢᭷䛩䜛㉸㟁ᑟ䝔䞊䝥⥺ᮦ䜢ᕳ䛝௜䛡䛯෇⟄䜢ෆᤄ䛩䜛䛣䛸䛷䚸ෆ㻌㒊✵㛫䛾ᤕᤊ☢ሙ䛾ᆒ୍ᛶ䛜㣕㌍ⓗ䛻ྥୖ䛩䜛䛣䛸䛜ᐇ㦂
Fig. 1. Half model of the framework for the numerical simulation ofⓗ䛻☜ㄆ䛥䜜䛶䛔䜛[2]䚹ᮏⓎ⾲䛷䛿䚸Ḟ㝗䛾఩⨨䛸䝃䜲䝈䛜
FCM, in which the position of the defect-A and defect-B are shown.
෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼ෆ䛾☢ሙศᕸ䛻ཬ䜌䛩ᙳ㡪䛸䚸㉸㟁ᑟ෇⟄䜢ෆᤄ䛧䛯ሙྜ䛾☢ሙᆒ୍ຠᯝ䜢䠏ḟඖ䝅䝭䝳䝺䞊䝅䝵䞁䛻䜘䜚᳨ウ䛧䛯䛾䛷ሗ࿌䛩䜛[3]䚹
㻞䠊ゎᯒ᪉ἲ㻌እᚄ 60 mm, ෆᚄ 28 mm, 㧗䛥 120 mm 䛾෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼(Jc1=4.8 x 108 A/m2)䜢 50 K 䛷ෆᚄ 100 mm, እᚄ
150 mm 䛾↓㝈㛗䝁䜲䝹䜢⏝䛔䛶እ㒊☢ሙ 4.7 T (200 MHz)୰䛷☢ሙ୰෭༷╔☢(FCM)䜢⾜䛖ሙྜ䜢᝿ᐃ䛧䛯䚹㉸㟁ᑟయ䛾 E-J ≉ᛶ䛿 n ್䝰䝕䝹(n=100)䚸ཬ䜃 Jc 䛾☢ሙ౫Ꮡ䛿↓䛔䛸௬ᐃ䛧䛯䚹ᅗ 1 䛻♧䛩䜘䛖䛻ᗙᶆ䜢ᐃ⩏䛧䚸䝞䝹䜽☢▼୰ᚰ㒊 defect-A (z=0 mm)䚸ཬ䜃➃㒊 defect-B (z=60 mm)䛻኱䛝䛺
Ḟ㝗(Jc=0)䜢௬ᐃ䛧䚸୰ᚰ௜㏆䛻䛚䛡䜛☢ ሙศᕸ䜢䠄ᰴ䠅
Photon 䛾 PHOTO-EDDY ver.7.2 䜢౑⏝䛧䛶䠏ḟඖ FEM 䛷ィ⟬䛧䛯䚹䜎䛯䚸ᆒ୍䛺 Jc (=Jc2)䜢᭷䛩䜛㉸㟁ᑟ෇⟄䠄እᚄ 27mm, ෆᚄ 26 mm, 㧗䛥 120 mm䠅䜢ෆᤄ䛧䚸Jc2 䜢 4.8 x 104 ~4.8 x 1010 A/m2 䛾⠊ᅖ䛷ኚ໬䛥䛫䛶☢ሙศᕸ䛾ᆒ୍໬䛻ᑐ䛩䜛ຠᯝ䜢ㄪ䜉䛯䚹㻟䠊ゎᯒ⤖ᯝ㻌ᅗ䠎䛻 defect-A䚸 defect-B 䛜෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾୰ᚰ௜㏆䛾☢ሙศᕸ䛻ཬ䜌䛩ᙳ㡪䜢♧䛩䚹୧䝞䝹䜽䛸䜒䛻Ḟ㝗䛾ᙳ㡪䛷୰ᚰ௜㏆䛾☢ሙศᕸ䛿኱䛝䛟஘䜜䚸defect-B 䝞䝹䜽䛾䜘䛖䛻䛯䛸䛘Ḟ㝗䛜㐲䛟䛻Ꮡᅾ䛧䛶䜒኱䛝䛟ᙳ㡪䛩䜛䛣䛸䛜ศ䛛䜛䚹䛣䜜䛿䝞䝹䜽య඲య䛾㟁ὶศᕸ䛜୰ᚰ㒊䛾☢ሙศᕸ䛻ᙳ㡪䛧䛶䛔䜛䛣䛸䜢♧䛧䛶䛔䜛䚹ᅗ䠏䛻䛿 defect-A䚸defect-B 䛜Ꮡᅾ䛩䜛䝞䝹䜽䛻ෆᤄ䛧䛯㉸㟁ᑟ෇⟄䛾 Jc2 䜢ኚ໬䛥䛫䛯ሙྜ䛾୰ᚰ௜㏆䛾☢ሙศᕸ䛾ᨵၿຠᯝ䜢♧䛩䚹෇⟄≧㉸㟁ᑟ䝞䝹䜽☢▼䛾 Jc1 䜘䜚ᑠ䛥
䛺 Jc2 䜢᭷䛩䜛㉸㟁ᑟ෇⟄䛾ෆᤄຠᯝ䛿↓䛔䛜䚸Jc2=Jc1=4.8
x 108 A/m2 ௨ୖ䛾㧗䛔 Jc2 䜢᭷䛩䜛㉸㟁ᑟ෇⟄䛾ᤄධ䛿䚸ᤕᤊ☢ሙ䛾ᆒ୍ᛶ䛜㣕㌍ⓗ䛻ྥୖ䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹ෆᤄ෇⟄䛻ὶ䜜䜛㟁ὶศᕸ䛾᳨ウ䛛䜙䚸Jc2 䛻㏆䛔኱䛝䛺㟁ὶ䛜ෆᤄ෇⟄䛾୧➃䛾࿘ᅇ㟁ὶ䛸䚸Ḟ㝗䛾࿘䜚䜢ྲྀ䜚ᕳ䛟䜘䛖䛻ὶ䜜䛶䛔䜛䛣䛸䛜ศ䛛䛳䛯䚹䛣䛾䛣䛸䛛䜙 FCM 䛾ῶ☢䝥䝻䝉䝇୰䛻ෆᤄ෇⟄ෆ䛷㟁ὶ䛾෌㓄⨨䛜⾜䜟䜜䚸≉䛻Ḟ㝗䛾࿘ᅖ䛾☢
ሙ䛾ῶᑡ䜢⿵ൾ䛩䜛䛯䜑䛾㟁ὶศᕸ䛜ᤕᤊ☢ሙ䛾ᆒ୍໬䛾ᐤ୚䛩䜛䛣䛸䛜᥎ᐃ䛥䜜䜛䚹

Fig. 2. The microscopic trapped field deviation ǻBz around the central
region along the x-direction and z-direction in the hole of the (a)defect-A bulk and (b) defect-B bulk.

Fig. 3. The trapped field deviation ǻBz (±4 mm) along the x-direction
and the z-direction in the hole for (a) defect-A bulk and (b) defect-B
bulk, as a function of the Jc2 of the inserted superconducting cylinder.

㻌ཧ⪃ᩥ⊩㻌
1. T. Nakamura et al., J. Mag. Reson. 259 (2015) 68.
2. Y. ltoh, Y. Yanagi and M. Yoshikawa, 2014, Japanese Patent
Application No. 2014-127301.
3. H. Fujishiro, Y. Itoh, Y. Yanagi and T. Nakamura,
Supercond. Sci. Technol. 28 (2015) 095018.

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第92回

2015年度秋季低温工学・超電導学会