SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟
2011B1978                Section B         BL46XUSm ⣔ከᒙ㉸ఏᑟࢸ࣮ࣉᮦࡢ Sm-L ྾཰➃࡛ࡢᘬᙇⲴ㔜㈇Ⲵୗࡢṍ ᐃ࣭ゎᯒࡢヨࡳ
Strain Assessment of Sm123 Coated Superconductor Composite Tapes
under Tensile Load Utilizingዟ⏣ ᾈྖ a, ⴠྜ ᗉ἞㑻 a, Ọ㔝 ఙ἞ a, ⸨஭ ⣖ᚿ a, ᑠ㔠⃝ ᬛஅ b
Hiroshi Okudaa, Shojiro Ochiaia, Shinji Naganoa, Noriyuki Fujiia, Tomoyuki Koganezawabaி㒔኱Ꮫ㻘㻌b 㧗㍤ᗘග⛉Ꮫ◊✲ࢭࣥࢱ࣮ aKyoto University, bJASRISm ⣔ࢥ࣮ࢸࢵࢻ㉸ఏᑟ」ྜ⥺ᮦࡢᘬᙇᛂຊ㈇Ⲵୗ࡛ࡢ Sm123 ㉸ఏᑟᒙࡢ⤖ᬗ᱁Ꮚṍࡢኚ໬ࢆㄪ࡭ࡿࡓࡵࠊSm LIII ྾཰➃㏆ഐࡢ␗ᖖศᩓຠᯝࢆ฼⏝ࡋࡓ In-situ 㠃ෆᅇᢡ ᐃࢆ࠾ࡇ࡞ࡗࡓࠋ௒ᅇࡢ ᐃ࡛ࡣ㓄ศࣅ࣮࣒ࢱ࢖࣒ෆ࡛ ᐃࡀ࡯ࡰ᏶஢࡛ࡁࡿࡇ࡜ࢆᛕ㢌࡟ࠊヨᩱ࡜ࡋ࡚ࡣ྾཰࡟ࡼ
ࡿῶ⾶ࡀ኱ࡁ࡞ᙳ㡪ࢆ୚࠼࡞࠸ࡼ࠺࡟ࠊᏳᐃ໬ࡢ Cu ࡵࡗࡁᒙࢆ⁐ゎ㝖ཤࡋࡓヨᩱࡢࡳࢆ⏝࠸ࠊࡲࡓࠊ ᐃࡣ⏦ㄳศࡢ࠺ࡕࣅ࣮࣒ࢱ࢖࣒ࡀㄆࡵࡽࢀࡓ㠃ෆᅇᢡࡢࡳࢆ࠾ࡇ࡞ࡗࡓࠋእ㒊㈇Ⲵᛂຊࡢ
ቑຍ࡟క࠸ Sm123 ᒙࡢᘬᙇṍࡣቑຍࡋࡓࠋ୍᪉ࠊ๓ᅇㄢ㢟᳨࡛ウࡋࡓ Dy ⣔ࡢᮦᩱ[1]࡜ẚ㍑ࡍࡿ
࡜㧗Ⲵ㔜㡿ᇦ࡛ࡢከ㔜◚᩿࡟క࠺ṍࡢ೵␃ࡀ᫂☜࡛࡞࠸ࡲࡲ◚ቯ๤㞳࡟⮳ࡾࠊࣆ࣮ࢡࢩࣇࢺ࠿ࡽࡣከ㔜◚᩿㡿ᇦࢆㄆࡵࡽࢀ࡞࠿ࡗࡓࠋࡇࡢࡼ࠺࡟ Sm123 ᮦᩱࡢሙྜ࡟ࡣ๓ᅇࡢ Dy ⣔ࡢ⤖ᯝ࠿ࡽᮇᚅࡉࢀࡓ⣔⤫ⓗṍホ౯࡟ࡘ࠸࡚ࡣ༑ศ࡞⢭ᗘࡢࢹ࣮ࢱࡀᚓࡽࢀ࡚࠾ࡽࡎࠊ⌧ᅾࡑࡢཎᅉࢆ᳨ウ୰࡛࠶ࡿࠋ୍᪉ࠊ㉸ఏᑟᒙࡢ◚ቯ㐍ᒎࡢ᭱⤊ẁ㝵࡛࠶ࡿ๤㞳ᣲື࡟ࡘ࠸࡚ࠊSm123 ᮦᩱ࡛ࡇࢀࡲ
࡛ࡢᛂຊṍ᭤⥺ࡢゎᯒ࠿ࡽᮇᚅࡉࢀ࡚࠸ࡓ๤㞳㐍ᒎ࡜␗࡞ࡿᣲືࢆ♧ࡋ࡚࠸ࡿ஦ࡀ௒ᅇࡢ In-situᐃ୰࡟ぢฟࡉࢀࡓࠋ㉸ఏᑟᒙࡢ◚ቯ-๤㞳ᶵᵓ࡬ࡢ Cu 㝖ཤࡢᙳ㡪࡟ࡘ࠸࡚ࡣ௒ᚋࡢ᳨ウㄢ㢟࡛࠶ࡿࠋ࣮࣮࢟࣡ࢻ㸸 ࡑࡢሙṍᐃࠊࢥ࣮ࢸࢵࢻ㉸ఏᑟ」ྜ⥺ᮦࠊ␗ᖖศᩓຠᯝࠊSm123 ㉸ఏᑟ⭷⫼ᬒ࡜◊✲┠ⓗ㸸㟁ຊ㈓ⶶࠊ㉸ᙉຊ☢▼࡞࡝ࡢ⏝㏵࡬ࡢᐇ⏝໬ࢆ┠ᣦࡋࠊ㧗㉸㟁ᑟ」ྜᮦᩱࡢ㧗ᛶ⬟໬ࠊ≉࡟⮫⏺㟁ὶᐦᗘࠊ⮫⏺㟁ὶ್ྥୖࡢ➇தࡀ⥆࠸࡚࠸ࡿࠋᚑ᮶ࡢ Ag ࢩ࣮ࢫ Bi2223 ከⰺ⥺ᮦ࡟⥆ࡁࠊ࢚ࣆࢱ࢟ࢩࣕࣝᡂ㛗ⷧ⭷࡟ࡼࡗ࡚ࡉࡽ࡟኱ࡁ࡞⮫⏺㟁ὶ್ࢆ㐩ᡂࡍࡿⷧ⭷㉸㟁ᑟ⥺ᮦ㛤Ⓨ࡟㛵ࡍࡿ➇தࡀ⃭ࡋࡃ࡞ࡗ࡚࠸ࡿࠋ୍᪉࡛ࠊ༑ศ࡞⮫⏺㟁ὶ್ࡀ㐩ᡂࡉࢀࡓᚋࡢᐇ⏝໬࡜࠸࠺ほⅬ࠿ࡽࡣࠊ㉸㟁ᑟ⥺ᮦ࡟ᑐࡍࡿእ㒊ᛂຊ㈇Ⲵ࡟ᑐࡋ࡚࡝ࢀࡔࡅࡢಙ㢗ᛶࡀಖ㞀ࡉࢀࡿࡢ࠿࡜࠸࠺ほⅬ࠿ࡽࡢᮦᩱᏛⓗホ౯ᡭἲࡢ☜❧ࡀồࡵࡽࢀ࡚࠸ࡿࠋ ⷧ⭷ᆺ㉸ఏᑟ⥺ᮦࡣ Ag ࢩ࣮ࢫᆺࡢ Bi ⣔㉸㟁ᑟ」ྜ⥺ᮦ࡜ẚ㍑ࡍࡿ࡜[2-4]ࠊᘬࡗᙇࡾᛂຊ࡟ࡼࡿ◚ቯ㐣⛬࡟࠾࠸࡚ࠊ◚ቯ㐍⾜ࡢᵝᘧࡀ኱ࡁࡃ␗࡞ࡿࡇ࡜ࡀศ࠿ࡗ࡚࠸ࡿ[5-7]ࠋ ௒ᅇᥦ᱌ࡋࡓ Sm123 ⣔ࢸ࣮ࣉᮦࡣ๓ᅇ⏦ㄳࡋࡓ Dy123 ⣔[1]࡜ẚ㍑ࡍࡿ࡜ᇶᯈࡢ୙ᆒ୍ኚᙧᢚไࢆ┠ⓗ࡜ࡋࡓ⇕ฎ⌮࡟ࡼࡿ⤌⧊ไᚚ࡞࡝ࠊຊᏛ≉ᛶ࡞࡝࡟㛵ࡋ࡚⪃៖ࡀᡶࢃࢀࡓᵓ㐀タィࡀ࡞ࡉࢀ࡚࠸ࡿࡓࡵࠊᛂຊ㈇Ⲵ୰ࡢ㉸ఏᑟᒙࡢṍࡢኚ໬ࡣ Dy࡜ࡣ␗࡞ࡿ࡜ண᝿ࡉࢀࡿࠋࡉࡽ࡟ࣂࢵࣇ࢓࣮ᒙᵓᡂࡀᒙࡢ✀ᅗ 1 BL46XU ࡛ࡢ In-situ ᐃ㢮ࠊᒙᩘ࡜ࡶ᱁ẁ࡟ከࡃࠊᒙᵓᡂࡀ」㞧࡟࡞ࡗ࡚࠸ࡿࡓࡵ࡟ࠊ㓄⨨ᴫせᛂຊ㈇Ⲵ⎔ቃ࡛ࡢ㉸ఏᑟ≉ᛶࡢゎᯒ࡟౑࠺ࡦࡎࡳࡢぢ✚ࡾ࡟⡆༢࡞ࣔࢹࣝᐇ㦂ࡸᘬᙇヨ㦂࡛ࡢ⤖ᯝࢆ฼⏝ࡍࡿጇᙜᛶࡣ᫂ࡽ࠿࡛࡞࠸ࠋࡑࡇ࡛ᮏ⏦ㄳ࡛ࡣࠊX ⥺ᅇᢡ ᐃ࡟ࡼࡾࠊᘬᙇ㈇Ⲵ୰ࡢ Cu ಖㆤᒙ௜ Sm ㉸ఏᑟࢸ࣮ࣉࡢ」ྜ㉸㟁ᑟᒙࡢᖹᆒ⤖ᬗ᱁Ꮚ䠉㻝㻥㻟䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section Bṍኚ໬࡜ࠊྛ㉸㟁ᑟᒙูࡢ⤖ᬗ᱁Ꮚṍኚ໬ࡢほᐹࢆ⾜࠺ࡇ࡜ࢆ┠ⓗ࡜ࡋࡓࠋࡇࡢ 2 ࡘࡢ┠ⓗࡢ㐙⾜࡟࠾࠸࡚ࠊ๓⪅࡟ࡘ࠸࡚ࡣ㧗㏱㐣⬟ࢆࡶࡘ㧗࢚ࢿࣝࢠ࣮X ⥺ࢆ฼⏝ࡋࡓ᮲௳࡛ࠊᚋ⪅࡟ࡘ࠸࡚ࡣ㏱㐣⬟ࡣᮇᚅ࡛ࡁ࡞࠸Ἴ㛗࡛ࡣ࠶ࡿࡶࡢࡢࠊࢥࣥࢺࣛࢫࢺࢆኚ
࠼ࡽࢀࡿ Sm-L ྾཰➃ࡢ␗ᖖศᩓຠᯝࢆ฼⏝ࡋࡓ᮲௳࡛ᐇ᪋ࡍࡿࡇ࡜ࢆ᳨ウࡋࡓࡀࠊ௒ᅇࡣ㓄ศࣅ࣮࣒ࢱ࢖࣒ࡢ㛵ಀ࡛ Sm-LIII ྾཰➃ࢆ฼⏝ࡋࠊཌ࠸ Cu ࡵࡗࡁᒙࢆ⁐ゎ㝖ཤࡋࡓヨᩱ࡟ᑐࡍࡿᘬࡗᙇࡾヨ㦂୰ࡢ㠃ෆ᱁Ꮚᐃᩘኚ໬ࡢ ᐃ࡟㝈ᐃࡋࡓᐇ㦂ࢆ࠾ࡇ࡞ࡗࡓࠋᮏㄢ㢟࡛⏝࠸ࡓヨᩱࡣ㞟ྜ⤌⧊ࢆᣢࡘNi ྜ㔠ᇶᯈୖ࡟࢚ࣆࢱ࢟ࢩࣕࣝ࡟㏆࠸Ⰻዲ࡞㓄ྥᛶࢆᣢࡕࠊ࠿ࡘ㉸ఏᑟ⭷࡬ࡢᩚྜᛶࡸ〇㐀࡞࡝ࣉࣟᅗ 2 ᮏᐇ㦂᮲௳࡟࠾ࡅࡿヨᩱࢆᵓᡂࡍࢭࢫ୰ࡢ⇕ᒚṔ࡬ࡢ⪏ᛶ࡞࡝ࢆ᭷ࡋࡓࣂࢵࣇ࢓ᒙࢆࡿྛඖ⣲ࡢཎᏊᩓ஘ᅉᏊᐇ㒊ࡢᩥ⊩್㉸ఏᑟ⭷࡜ࡢ㛫࡟ᙧᡂࡍࡿᚲせࡀ࠶ࡿ࡜࠸࠺せㄳ࠿
ࡽ MgO ࢆ୰ᚰ࡜ࡋ࡚ᩘ✀㢮ࡢከᒙࣂࢵࣇ࢓ᵓ㐀ࢆᙧᡂࡋ࡚࠾ࡾࠊࡉࡽ࡟⾲㠃ഃ࡟ಖㆤᒙࢆࡶࡘ࡜࠸࠺」㞧࡞ᵓ㐀ࢆ᭷ࡋ࡚࠸ࡿࠋࡑࡢᵓᡂヲ⣽࡟ࡘ࠸࡚ࡣヲ⣽㠀බ⾲࡞ࡀࡽࠊ㉸ఏᑟ≉ᛶྥୖࡢࡓࡵ」ᩘᒙᙧᡂ࡟ࡼࡿ᭱㐺໬ࡀ⾜ࢃࢀ࡚࠸ࡿࠋࡋ࠿ࡋᙧᡂ᫬ࡢ᱁Ꮚᩚྜ㛵ಀࠊኚᙧ᫬ࡢ᱁Ꮚᩚྜ㛵ಀࡸṍ࠾ࡼࡧࢡࣛࢵࢡ࡞࡝ࡢṍゎᨺᶵᵓ࡟ࡘ࠸᳨࡚ウࡍࡿࡓࡵ࡟ࡣ㉸ఏᑟ≉ᛶ࡟┤᥋࠿࠿ࢃࡿ
Sm123 ᒙࡢ◚ቯ࡜ࡢ㛵ಀࢆศ㞳ホ౯ࡍࡿᚲせࡀ࠶ࡾࠊ㓄ྥࡋࡓ㉸ఏᑟᒙ㸦Sm123㸧ࡢ㠃ෆᅇᢡࣆ࣮ࢡࠊࡍ࡞ࢃࡕ㉸ఏᑟ㟁ὶࡢ᪉ྥ࡟㈇Ⲵࡉࢀࡿṍࡢ┤᥋ ᐃࡀᚲせ࡛࠶ࡿࠋࡑࡇ࡛␗ᖖศᩓຠᯝࢆ฼⏝ࡋࡓ㠃ෆᅇᢡࣆ࣮ࢡホ౯ࢆヨࡳࡓࠋᐇ㦂㸸ヨᩱࡣ㡑ᅜ㟁Ẽ㝔㸦KERI㸧࠿ࡽᥦ౪ࢆཷࡅࡓ Sm123 ┦ࢆ㉸ఏᑟᒙ࡜ࡍࡿࣁࢫࢸࣟ࢖ᇶᯈୖࡢ㉸ఏᑟ」ྜࢸ࣮ࣉᮦ࡛࠶ࡿࠋእ㒊ᛂຊ㈇Ⲵ᮲௳ୗ࡛ࡢ㉸ఏᑟ㟁ὶ ᐃ࡟࠾࠸࡚ࡣ୺࡜ࡋ࡚㉸ఏᑟᏳᐃ໬ࡢ┠ⓗ࡛ཌ࠸ Cu ᒙࢆ⿕そࡋ࡚࠸ࡿࡀࠊ௒ᅇࡢ ᐃ࡛౑⏝ࡍࡿ X ⥺ࡢ࢚ࢿࣝࢠ࣮ࡀప࠸ࡓࡵࠊ☜ᐇ࡟ࢹ࣮ࢱࢆྲྀᚓࡍࡿ஦ࢆ┠ⓗ࡜ࡋ࡚ Cu ಖㆤᒙࡣ໬Ꮫ◊☻࡟ࡼࡾ㝖ཤࡋࠊCu ࡞ࡽࡧ࡟ Ag ᒙࢆ㝖ཤࡋࡓ Sm123 ⣔㉸ఏᑟࢸ࣮ࣉᮦᩱ࡟ᑐࡋࠊ㈇Ⲵࢆ࠿ࡅ࡞ࡀࡽṍ ᐃࢆ࠾ࡇ࡞ࡗࡓࠋᐃࡣ㠃ෆᅇᢡ࡟ࡼࡾᘬᙇ᪉ྥࡢᩓ஘࣋ࢡࢺࣝ࡟ᑐᛂࡍࡿᅇᢡࢆ BL46XU ࡢከ㍈ᅇᢡィ࡟ࡼࡾ ᐃࡋࡓࠋ๓ㄢ㢟࡜
ྠᵝ࡟ᑠᆺࡢࡑࡢሙᘬᙇヨ㦂⿦⨨ࢆከ㍈ᅇᢡィୖ࡟࣐࢘ࣥ
ࢺࡋࠊ㈇ⲴⲴ㔜࡟ࡼࡿᅇᢡࣆ࣮ࢡࡢࢩࣇࢺࢆ ᐃࡋࡓࠋࡑࡢ
ᴫ␎ࢆᅗ 1 ࡟♧ࡍࡀࠊ๓ㄢ㢟ࡢሗ࿌[6]࡜ྠࡌ ș/2ș ᐃࢆ࠾ࡇ࡞ࡗࡓࠋ㠃ෆᅇᢡ࡟㛵ࡋ࡚ࡣ๓ㄢ㢟ྠᵝ Grancing Angleࡀ㸯r࡜࡞ࡿ㓄⨨࡜ࡾࠊἼ㛗࡜ࡋ࡚ Sm LIII ྾཰➃ࡢ┤ୗ࡜
⣙ 200 eV ప࢚ࢿࣝࢠ࣮ഃࡢ 2 Ỉ‽ࢆ⏝࠸ࡓࠋᅗ 2 ࡣᩥ⊩[7㸪8]࠿ࡽ෌ࣉࣟࢵࢺࡋࡓᮏ」ྜࢸ࣮ࣉᮦࡢᵓᡂඖ⣲࡟ᑐࡍࡿཎᏊᩓ஘ᅉᏊᐇ㒊ࡢ࢚ࢿࣝࢠ࣮౫Ꮡᛶ࡛࠶ࡾࠊᮏ ᐃ࡛ࡣ⦪ࡢᐇ⥺࡛♧ࡉࢀࡿ 2 Ỉ‽࡛ࡢ ᐃࢆ࠾ࡇ࡞ࡗࡓࠋ㓄⨨ࡢヲ⣽ ᅗ 3 ᮏᐇ㦂᮲௳ࡢ㓄⨨ᶍᘧᅗ
ࢆᅗ 3 ࡟♧ࡍࠋࣅ࣮࣒ࢧ࢖ࢬࡣ㧗ࡉ 0.5 mm ᖜ 1.6mmࠊཷග 㸦෗┿ࡣᅗ 1 ཧ↷㸧ᩓ஘࣋ࢡࢺࣝࢫࣜࢵࢺ㸦RS㸧ࡣヨᩱ࠿ࡽ 55 cm ఩⨨࡛ 0.5㹼1 mm㹶2 mm ࡀ㉸ఏᑟ㓄ྥ⭷ࡢ㟁ὶ᪉ྥ㸻ᛂຊ࡜ࡋࡓࡀࠊ㉸ఏᑟ⭷ࡀ࢚ࣆࢱ࢟ࢩࣕࣝ⭷࡛࠶ࡿࡓࡵࠊᅇᢡ༙ ㈇ Ⲵ ᪉ ྥ ( 㟷 ▮ ༳ ) ࡟ ࡞ ࡿ ࡼ ࠺ ධ್ᖜࡣ㉸ఏᑟ⭷ࡢ⤖ᬗᛶ࡟ࡼࡗ࡚Ỵࡲࡿࠋᑕࠊᅇᢡ⥺࡜ᘬᙇࡾ᪉ྥࢆไᚚࠋ⤖ᯝ࠾ࡼࡧ⪃ᐹ㸸 SM123 ┦ࡢᅇᢡࣆ࣮ࢡࡢ㈇Ⲵᛂຊ࡟ᑐࡍࡿࢩࣇࢺࢆᅗ 4 ࡟♧ࡍࠋࣆ࣮ࢡᙧ≧ࡢ Lorenz ཬࡧ Voigt
ࣇ࢕ࢵࢺ࠿ࡽぢ✚ࡶࡗࡓṍࡢኚ໬ࡣ㈇Ⲵᛂຊ࡟ᑐࡋ࡚┤⥺ⓗ࡟ኚ໬ࡋࡓࠋࡋ࠿ࡋ࡞ࡀࡽࠊᮏᐇ㦂࡛⏝࠸ࡓ」ྜࢸ࣮ࣉᮦ࡟࠾ࡅࡿࣁࢫࢸࣟ࢖ᇶᯈࡢ㝆అᙉᗘࡣணഛᐇ㦂࡟ࡼࡿண᝿ࡼࡾపࡃࠊ௨๓
ࡢ Dy ⣔」ྜࢸ࣮ࣉᮦࡢ࡯ࡰ༙ศࠊ200 N ⛬ᗘࡋ࠿࡞࠿ࡗࡓࡓࡵࠊᙜึᮇᚅࡋ࡚࠸ࡓከ㔜◚᩿㡿ᇦ࡟㐩ࡍࡿ௨๓ࡢẚ㍑ⓗᑠࡉ࡞ṍࡢ≧ែ࠿ࡽ๤㞳ࡀጞࡲࡗ࡚ࡋࡲࡗࡓࠋࡉࡽ࡟ࣁࢫࢸࣟ࢖ࡢᙎᛶ㝈䠉㻝㻥㻠䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section Bෆ࡛࠶ࡿࡣࡎࡢࡼࡾపⲴ㔜㡿ᇦࠊලయⓗ࡟ࡣ௒ᅇᙎᛶ㝈ෆ࡛࠶ࡿࡣࡎࡢ㈇ⲴⲴ
㔜 60 N ࡟࠾࠸࡚ࠊィ⟬ୖᮇᚅࡉࢀࡿṍ࡛࠶ࡿ 0.1%࡟ᑐࡋࠊᅇᢡࣆ࣮ࢡࡢࢩࣇࢺ
㔞ࡀ 0.02s0.05%⛬ᗘࡋ࠿᳨ฟࡉࢀࡎࠊ
㉸ఏᑟᒙ࡟ఱࡽ࠿ࡢ᪩ᮇ◚ቯᶵᵓࡀാ
࠸࡚࠸ࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋ௒ᅇࡢࢹ
࣮ࢱࡣࡇࡢࡼ࠺࡟ࣆ࣮ࢡࢩࣇࢺ㔞ࡣୖ
㏙ࡢࡼ࠺࡟༢⣧࡞ᘬᙇヨ㦂࠿ࡽᮇᚅࡉ
ࢀࡿ್ࡼࡾᑠࡉࡃࠊᅇᢡ್༙ᖜ࡜ẚ㍑ࡋ
࡚ࡑࡢ 10%௨ୗࡢᑠࡉ࠸ࢹ࣮ࢱࡋ࠿ᚓࡽࢀ࡞࠿ࡗࡓࠋࡑࡢ್࡟ࡘ࠸࡚ࡶࠊㄗᕪࡀ኱ࡁࡃᮇᚅࡋ࡚࠸ࡓ᫂☜࡞ṍศ㞳ࡣᅔ㞴࡞ࢹ࣮ࢱ࡜࡞ࡗ࡚࠸ࡿࠋ㈇ⲴⲴ㔜ࡢ
ᅗ46P ᅇᢡࣆ࣮ࢡࡢ㈇Ⲵᛂຊ࡟క࠺ࣆ࣮ࢡࢩ
ኚ໬ࡀᑠࡉ࠸㡿ᇦ࡛ࡢホ౯࡟࡞ࡿࡓࡵࠊ⌧ࣇࢺ࡜㸰1 ࢆᇶ‽࡜ࡋ࡚ィ⟬ࡋࡓṍᅾྛࣆ࣮ࢡࡢ⢭ᗘẚ㍑࡟ࡼࡿᐃ㔞໬ࡢ᳨ウࢆ㐍ࡵ࡚࠸ࡿࡀࠊ๓ㄢ㢟࡛ ᐃࡋࡓ Dy⣔ࢸ࣮ࣉᮦ࡜ẚ㍑ࡋࡓሙྜࠊ௒ᅇࡢᐇ㦂࡛ṍࡢ ᐃ್ࡀᚓࡽࢀࡓ⠊ᅖࡣ㈇Ⲵᛂຊ್࡛ 200 MPa ௨ୗ࡜ࠊࣁࢫࢸࣟ࢖ࡢᙎᛶኚᙧ㡿ᇦ࡛࠶ࡿ࡜ᮇᚅࡉࢀࡿ࡟ࡶ࠿࠿ࢃ
ࡽࡎࠊIn-plane ࡛ ᐃࡋࡓᘬᙇ᪉ྥ࡬ࡢṍࡢホ౯್ࡀ 0.04%࡟ࡋ
࠿㐩ࡏࡎࠊᛂຊṍ᭤⥺࡛ࡇࡢ㈇Ⲵᛂຊࣞ࣋ࣝ࡟ᑐࡋ࡚ᮇᚅࡉࢀࡿ
0.2%⛬ᗘ࡜ẚ㍑ࡍࡿ࡜᭷ព࡟పࡃ࡞ࡗ࡚࠸ࡿࠋDy123 ᮦࡢሙྜࡢ
⤖ᯝ[6]࡜ẚ㍑ࡍࡿ࡜ࠊᑡ࡞ࡃ࡜ࡶ 0.1%⛬ᗘࡢṍࡀᏑᅾࡍࢀࡤၥ㢟࡞ࡃホ౯ྍ⬟࡛࠶ࡿ࡜࠸࠺⤖ᯝࡣᚓࡽࢀ࡚࠾ࡾࠊ௒ᅇࡢ⤖ᯝࡣఱࡽ࠿ࡢ⌮⏤࡛㉸ఏᑟᒙࡢ◚᩿/ᛂຊࡢ㒊ศⓗゎᨺࡀపᛂຊ࠿ࡽ
ጞࡲࡗ࡚࠸ࡓ࡜⪃࠼ࡽࢀࡿࠋࡑࡢཎᅉ࡜ࡋ࡚ࡣ Sm123 ᮦࡢࣂࢵࣇ࢓ᵓᡂࡀ Dy123 ᮦ࡜ẚ㍑ࡋ࡚」㞧࡞ᵓ㐀ࢆᣢࡗ࡚࠸ࡿࡓࡵ࡟⤖ᬗ⢏ࡢࣔ࣍ࣟࢪ࣮(⤌⧊ᖹᆠᛶ)ࡢ㐪࠸࠿ࡽⲴ㔜㈇Ⲵࡢ≧ែ࡛ᛂຊ㞟୰ࢆ㉳ࡇࡋࡸࡍ࠸ྍ⬟ᛶࡀ࠶ࡿࡇ࡜ࠊ⾲㠃࡟ࡘࡅࡽࢀࡓ
Cu ಖㆤᒙࢆ໬Ꮫⓗ࡟㝖ཤࡍࡿᚲせࡀ࠶ࡗࡓࡇ࡜࠿ࡽࠊX ⥺⏝ࡢヨᩱࢆసᡂࡍࡿࡇࡢ㐣⛬࡛㉸ఏᑟᒙࡀ໬Ꮫⓗࠊ࠶ࡿ࠸ࡣᣊ᮰ຠᯝ
ࡢኚ໬࡟క࠺㉸ఏᑟᒙࡢຎ໬࡞࡝࡟ࡼࡿ᪩ᮇᚤ⣽ࢡࣛࢵࢡ㐍ᒎ࡞࡝ࡢࢲ࣓࣮ࢪࢆཷࡅࡓྍ⬟ᛶࡀྰᐃ࡛ࡁ࡞࠸ࡇ࡜࡞࡝ࡀ⪃ᅗ5ᇶᯈࡢረᛶኚᙧ㛤ጞᚋ࠼ࡽࢀࡿࠋࡇࡢࡼ࠺࡞ࢡࣛࢵࢡ࠿ࡽ᭱⤊๤㞳๝ⴠ࡟࠸ࡓࡿ◚ቯࡉࡽ࡟ረᛶኚᙧࢆຍ࠼ࡓヨᩱ㐣⛬࡛ࡣࠊX ⥺ᅇᢡ ᐃ୰࡟ྠ᫬࡟࠾ࡇ࡞ࡗ࡚࠸ࡓࠊගᏛ㢧ᚤࡢ⾲㠃≧ែࡢ㹡㹡㹢⏬ീࠋ㉸㙾࡟ࡼࡿヨᩱ⾲㠃⤌⧊ࡢほᐹ⤖ᯝ࠿ࡽࠊ㝆అᚋࡢࡼࡾ኱ࡁ࡞ረఏᑟᒙࡢ๤㞳ࡀᇶᯈࡢࡍ࡭
ᛶṍࡢ㈇Ⲵ࡟ࡼࡾࠊู㏵࠾ࡇ࡞ࡗ࡚࠸ࡿᮏヨᩱࡢప ᘬᙇ◚ቯࡾᖏᙧᡂ᪉ྥ࡟ἢࡗ࡚㐍⾜ࡋᚋࡢ Cu ಖㆤᒙ㝖ཤ࡟ࡼࡿ⤌⧊ほᐹ࡜ࡶࠊDy ⣔ヨᩱࡢᘬᙇ◚ቯ࡚࠸ࡿࡇ࡜ࢆ♧၀ࡍࡿ⤖ᯝࡀᚋࡢ๤㞳㐣⛬࡜ࡶ␗࡞ࡿ⤌⧊ኚ໬ࡀほᐹࡉࢀࡓࠋᮏᐇ㦂ࡣⲴ㔜ᚓࡽࢀࡓࠋไᚚ࡛࠾ࡇ࡞ࡗ࡚࠸ࡿࡓࡵࠊᇶᯈ㝆అᚋࡢኚᙧᣲື࡟ࡘ࠸࡚ࡣᐃ㔞ⓗ࡞ࢹ࣮ࢱࡣྲྀᚓ࡛ࡁ࡞࠸ࡀࠊࡑࡢᐃᛶⓗ࡞≉ᚩࢆᅗ 5 ගᏛ㢧ᚤ㙾෗┿࡟♧ࡍࠋ Sm123 ࢸ࣮ࣉᮦࡣࠊ㉸ఏᑟ㟁ὶࡢຎ໬ࡣẚ㍑ⓗ୍ᵝ࡟㉳ࡇࡿࡇ࡜ࠊࡍ࡞ࢃࡕḞ㝗ศᕸࡀ୍ᵝ࡛࠶ࡾࠊ㉸ఏᑟ⥺ᮦసᡂࡢ◊✲ࢢ࣮ࣝࣉ࡟ࡼࡿᚑ᮶ࡢሗ࿌࡛ࡣᇶᯈࡢ࣮ࣜࣗࢲ࣮ࢫኚᙧ࡟≉᭷ࡢᒁᅾ໬ࡋࡓ◚ቯ㡿ᇦࡢ㐍⾜ࡣ࡞࠸࡜ࡉࢀ࡚࠸ࡓࠋ ࡇࢀࡣ๓ㄢ㢟࡛ ᐃࡋࡓ Dy123 ㉸ఏᑟࢸ࣮ࣉᮦ
ࡢ≉ᚩ࡜ẚ㍑ࡋࡓሙྜࠊDy123 ࢸ࣮ࣉᮦ࡛ࡣᇶᯈ㝆అᚋࡢ࣮ࣜࣗࢲ࣮ࢫᖏࡢఙ㛗㐣⛬࡛ࡣ㉸ఏᑟᒙࡢ◚ቯࡣ࣮ࣜࣗࢲ࣮ࢫᖏ㏆ഐ࡟ᒁᡤⓗ࡟㝈ᐃࡉࢀ࡚࠸ࡿ୍᪉࡛ࠊ㉸ఏᑟᒙࡢࡶࡘṍࡣ఩⨨࡟ࡼࡽࡎ୍ᐃ್ࡢࡲࡲ࡜࡝ࡲࡿ㡿ᇦࡀᏑᅾࡍࡿ㹙6㹛ࡢ࡟ᑐࡋࠊ௒ᅇࡢ Sm123 ヨᩱ࡛ࡣᇶᯈࡢ࣮ࣜࣗ
ࢲ࣮ࢫኚᙧࡣࡑࢀ࡯࡝㢧ⴭ࡛ࡣ࡞ࡃࠊ㉸ఏᑟᒙࡢࢡࣛࢵࢡ㐍ᒎ࡟ࡼࡿ◚ቯࡣヨᩱ඲㠃࡛ẚ㍑ⓗᆒ୍࡟㐍⾜ࡍࡿ࡜ࡉࢀ࡚࠸ࡿࠋࡇࡢᚑ᮶ࡢሗ࿌ࡉࢀࡓ≉ᚩࡣ㝆అ๓ࡢపᛂຊ㡿ᇦ࡛㉸ఏᑟᒙ୰ࡢ X⥺࡟ࡼࡿ᳨ฟṍࡀᑠࡉ࠸ࡇ࡜࡜▩┪ࡋ࡞࠸ࡀࠊࡶࡋᐇ㝿ࡢ㉸ఏᑟ≉ᛶ ᐃ᫬࡟࠾࠸࡚௒ᅇࡢ ᐃ䠉㻝㻥㻡䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section B᳨࡛ฟࡉࢀࡓ⛬ᗘࡢᑠࡉ࡞ṍࡋ࠿ṧࡗ࡚࠸࡞࠸࡜ࡍࡿ࡜㉸ఏᑟ⮫⏺㟁ὶᐦᗘࡢపୗࡣ㈇Ⲵṍ࡟ᑐࡋ࡚ࡣࡿ࠿࡟⃭ࡋࡃ࡞ࡽ࡞ࡅࢀࡤ࡞ࡽࡎࠊྜ⌮ⓗ࡛ࡣ࡞࠸ࠋ୍᪉࡛ࠊ኱ࡁ࡞ṍࡀ㈇Ⲵࡉࢀࡿ㡿ᇦ
࡛ࡣᅗ 4 ࡢࡼ࠺࡟࣮ࣜࣗࢲ࣮ࢬᖏࡢ㐍ᒎ࡟ᑐᛂࡋࡓ㉸ఏᑟ⭷ࡢ๝ⴠࡢ㐍⾜ࡀほᐹࡉࢀࠊ࣮ࣜࣗࢲ࣮ࢫኚᙧࢆ㉳ࡇࡉ࡞࠸ࠊ࡜࠸࠺ሗ࿌ࡣṇࡋࡃ࡞࠸ࡇ࡜ࡀࢃ࠿ࡿࠋࡋࡓࡀࡗ࡚௒ᅇࡢ⤖ᯝࡣ X ⥺ᐃ⏝ヨᩱసᡂ࡟ࡼࡗ࡚ఱࡽ࠿ࡢ≉ᛶኚ໬ࡀࡶࡓࡽࡉࢀࡓࡓࡵࠊ࣮ࣜࣗࢲ࣮ࢫᖏᙧᡂࡼࡾࡣࡿ࠿࡟పᛂຊ㡿ᇦ࡛㉸ఏᑟ⭷ෆ࡛ࡢከ㔜◚᩿⌧㇟ࡀ㐍⾜ࡋࡓࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ ᅗ 4 ࡟♧ࡍᮏᐇ㦂࡛⾜ࡗࡓ Cu ಖㆤᒙࢆ㝖ཤࡋࡓ Sm123 ヨᩱࡢ⾲㠃ほᐹ⤖ᯝ࡛ࡣࠊᇶᯈࡀ㝆అࡋࡓᚋࡢࡼࡾ኱ࡁ࡞ረᛶṍࡢ㡿ᇦ࡛ࡣୗᆅࡢ࣮ࣜࣗࢲ࣮ࢫኚᙧᖏࡢࣔ࣍ࣟࢪ࣮࡜ᑐᛂࡉࡏࡿࡇ࡜ࡣ࡛ࡁ࡞࠿ࡗࡓࡶࡢࡢࠊ๤㞳࡟ࡼࡾ Bragg ࣆ࣮ࢡࡀほᐹࡉࢀ࡞ࡃ࡞ࡗࡓ≧ែ࡟⮳ࡗࡓ᫬Ⅼ࡛ࠊᒁᅾ໬ࡋࡓ๤㞳ࡢ㐍⾜ࡀ๓ᅇࡢ Dy ⣔ヨᩱ࡛⏝࠸ࡽࢀࡓ࣮ࣜࣗࢲ࣮ࢫኚᙧࢆ㉳ࡇࡍᇶᯈ࡜ྠᵝࡢࣔ࣍ࣟࢪ࣮࡛㐍⾜ࡍࡿࡇ࡜ࡀ☜ㄆࡉࢀࡓࠋࡇࢀࡀᖖఏᑟ໬࡜๤㞳ࡀู࣓࢝ࢽࢬ࣒࡛㐍⾜ࡍࡿ࡜࠸࠺
⤖ᯝ࡛࠶ࡿࡢ࠿ࠊ࠶ࡿ࠸ࡣ Cu ಖㆤᒙࡢ㝖ཤ࡟ࡼࡾ◚ቯᶵᵓ࡟ኚ໬ࡀ⏕ࡌࡓࡓࡵ࠿࡟㛵ࡋ࡚ࡣࠊ௒
ᚋ Cu ࡢⷧᒙࡢࡘ࠸ࡓヨᩱ࡟ࡼࡿᐇ㦂᳨࡛ドࡍࡿᚲせࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ
௒ᚋࡢㄢ㢟㉸ఏᑟ㟁ὶᏳᐃ໬ࡢࡓࡵࡢ Cu ಖㆤᒙࢆ㝖ཤࡋࡓヨᩱ࡟ࡼࡿᐊ ᘬᙇⲴ㔜㈇Ⲵୗ࡛ࡢṍ ᐃ࡟ࡼࡾࠊṍࡢ᳨ฟ࡟ࡣᡂຌࡋࡓࡀࠊᇶᯈࡢࣁࢫࢸࣟ࢖ࡢᙎᛶኚᙧࢆᇶ‽࡜ࡋ࡚㉸ఏᑟᒙࡢኚᙧᣲືࢆぢࡓሙྜࠊ௨๓ࡢ Dy ⣔㉸ఏᑟⷧ⭷ࡢṍホ౯ࡢ⤖ᯝ࡜ࡢᑐᛂࡸࠊ㉸ఏᑟᒙࡢ᪩ᮇ๤㞳㛤ጞ࡜ࡑࡢࣔ࣍ࣟࢪ࣮࡟ࡘ࠸࡚ࡣู㏵࠾ࡇ࡞ࡗ࡚࠸ࡿ㉸ఏᑟ≉ᛶ ᐃᚋ࡟ Cu ಖㆤᒙࢆ㝖ཤࡋࡓほᐹ⤖ᯝ࡜ࡢᩚྜᛶ࡟᳨ウࡢవᆅࡀṧࡗࡓࠋࡇࡢ㐪࠸ࡢཎᅉࡢࡦ࡜ࡘࡣ௒ᅇࡢ Sm ⣔」ྜᮦᩱࡀ」㞧࡞ᒙᵓᡂࢆᣢࡕࠊ⤖ᬗ⢏⤌⧊ࡶ Dy ⣔ヨᩱ࡜␗࡞ࡿࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋᐃ㔞ⓗ࡞ࢹ࣮ࢱྲྀᚓࡢ
ࡓࡵ࡟ࡣࠊࡇࢀࡽࡢ㐪࠸ࡀ Cu ಖㆤᒙࡢຊᏛⓗ࡞ᣊ᮰࡟⏤᮶ࡍࡿࡶࡢ࡛࠶ࡿ࠿ྰ࠿࡟ࡘ࠸࡚ࠊX ⥺㏱㐣⬟࠿ࡽチᐜࡉࢀࡿ⛬ᗘࡢ Cu ಖㆤᒙࢆᣢࡘヨᩱ࡛ࡢẚ㍑ᐇ㦂ࡀᚲせ࡟࡞ࡿ࡜⪃࠼ࡽࢀࡿࠋཧ⪃ᩥ⊩㸸
[1] ዟ⏣ᾈྖ ௚, SPring-8 㔜Ⅼ⏘ᴗ฼⏝ㄢ㢟ᡂᯝሗ࿌᭩, 2010B1864[2] S. Ochiai et al., J. Appl. Phys. 103, 123911 (2008).
[3] H. Okuda et al., Physica C 411, 114 (2004).
[4] S. Ochiai et al., Supercond. Sci. Technol., 21, 075009 (2008).
[5] S. Ochiai et al., J.Appl.Phys. 108, 063905 (2010).
[6] H. Okuda et al., Physica C 471, 1067 (2011).
[7] S.Sasaki, KEK report 83-22 (1984).
[8] http://www.nist.gov/pml/data/ffast/index.cfm(Received: May 8, 2012; Early edition: February 26, 2019;
Accepted: July 16, 2019; Published: August 29, 2019)䠉㻝㻥㻢䠉