d X ü¥C~ñF«Éæé³ºÅÌ¥«¤`¡Â«(³C­¥êCá·)ºªèZpÌJ­`

v

|

Íº¼È

àc@l

Î¼¼÷
¢R T

Låwåw@w¤È¨ÈwêU8526 L§Ls¾R 1_
3_1
§739_

Låwåw@w¤È¨ÈwêU8526 L§Ls¾R 1_
3_1
§739_

PxõÈw¤Z^[p¤£iå
5198 ºÉ§²pS²p¬õs 1_1_1§679_

X ü¥C~ñF«iXMCDjÍC­¥«Ìð\¬·éÁèÌ³fÌdqóÔÆ¥CóÔð²×éLpÈÀ±è@ÌêÂÅéBÅßCæO¢ãúËõ{ÝðSÉC³C­¥êCá·Ì¡Â«ºÅÌ¥«¤ª·ñÉsíêÄ

¢éBSPring­8 BL39XU ÅÍC¡Â«ºÅÌ XMCD ªèÌÀ»Æ»Ì¸xÉ´x»ðÚwµÄCWõ~[Ì±üâ in situ ³ÍªèÌm§C¿Â«Ì®õªi³ê½B»ÌÊC·x 2 KC¥ê10 TC³Í170 GPa ÅÌ
XMCD ªèªÂ\ÆÈèC¥«¤ÌV½ÈWJªnÜÁÄ¢éB

1. Í¶ßÉ

³}ÌªpÅ«È¢î X üÌæÅÍÀ»¢ïÈÌÉÎ
µCd X üÌæÅÍÂ\Å¨¿Ì»\¢iiqjÆ¥«ÆÌ­¢ÖÍC¥«¤É¨¯éÃ­©çÌgsbNÅéB¥«´qÌàÂd

qXsÔÉÍ½ç­Ýìpið·ÝìpjÌå«³ÍC»Ì£â¥«´qðæèÍÞzÊqÌíÞÉÂ«iªqêCO¹¬¬ÈÇjÉ­­Ë¶µC»ÌÊC¨¿

èC3d JÚà®â 4f óyÞ³fðSÆµ½½­Ì¨¿ªªèÎÛÆÈéB³çÉC
Mbar ÌæðÜÞL¢³ÍÌæÅªèÅ«éãC·xâ¥êCdêÌ¼ÌOêÆÌZªeÕÅ

é±ÆàÁ¥Å

éB±Ìæ¤ÈÁ¥ð©µ½d X üÌæ XMCD Éæé³ºÌ¥«¤ÌV½ÈWJªnÜÁÄ¢éBnSÌÌ¥CóÔðèt¯éB¨¿Ì¥«ð´qÔ£COÌúËõ{ÝÉ¨¢ÄC³º XMCD ªèªÂ\ÌÏ_©çð·éãÅC»ÌÖÉÖ·é¼ÚIÈm©

Èr[CÍµÄ½­È¢ªC±±NÍAJ

ð^¦éOêCu³ÍvÍdvÈMÍwIp[^Æ¢Ì APS Ìr[C 4_ID_D6) âtXÌ SOLEIL¦éB³ÍÍC´qÔ£ð¸­³¹C»\¢ÌÎÌ«Ìr[C ODE7) Å¸ÍIÉsíêÄ¢éBÁÉt

éBÇÂ«ðÏ»³¹½

XÌ SOLEIL ÅÍC³ÍÂÏÌ_ChÉA

ÊCdq\¢É¾mÈÏ»ðà½çµCà®_âÌ]Ú

rÉZiDACjð}üÂ\È´`±¥ÎiÅå 7 Tjâ¥CÌÏøÊCXs]ÚÈÇÌ»Ûðø«N±·B»ª±ü³êÄ¨èCESRF Ìr[C ID248) ÆÌ±Ìæ¤È»ÛÉÎµÄCdqóÔâ¥CóÔÉÚµ½V

Ýª¯ªÈ³êÄ¢éBäªÅÍCMÒçª2000N©

µ¢³ÍºÌ¥«¤ÆµÄCÅßÚ³êÄ¢éè@ª

ç SPring­8 BL39XU É¨¢Ä³º XMCD ªèÌJ­úËõðpµ½d X ü¥C~ñF«iXMCDjÅ

ÉÂ«®õðißÄ½9)B»ÝÅÍC³Íi170 GPajÉìp·ép[^ÅéB

XMCD ÍC¥»³ê½¿Éæé¶E~ÎõÌ X üz¾¯ÅÈ­C·xi2 KjC¥êi10 TjðÁ¦½¡ÂûÊÌ·ÆµÄè`³êéB»ÌMÍCdqJÚðº¤«ð À»µC ¼{Ýð [hµ½ªè Â«ð®¦ Ä¢³fzû[ßTÅÏª³êé±Æ©çCzû´qüèÌÇ

é10,11)B\¢ÆdqóÔÉÖ·é³fIðI©ÂdqkIðIÈ

{eÅÍCSPring­8 BL39XU ÅÌ XMCD ðpµ½îñð^¦é1_3) BÜ½C¥»Ì½]ÉºÁÄ XMCD Ì³ºÌ¥«¤ðÐî·éB³º XMCD ÌiWÍC

à½]·é½ßC¡íÌ³fÌ¥C[gÔÌPxúËõõ¹Æ X üõwZpÌ­WÉÁ¦ÄC~Îª­¥«I©½­¥«I©ð»Ê·é±ÆªÅ«éBõÏ²@12) Éã\³êé¸xÉ´xªèÉæé S/N

Ü½C¥Cõwa¥4,5) ðKp·é±ÆÅCÚ·é¥äâoø¦Cv¸xÌiiÌüãÉ¤Æ±ëªå««³fÌO¹¥C[gÆXs¥C[gÆð¢B»±ÅC2 ÍÅÍ SPring­8 BL39XU ÌuÌÁF¨ª£µ½èÊ]¿ªÂ\ÅÆµÄêiÆè

éÁ·©çC¥«¤Ìè@æÑªèZpÉÂ¢ÄTà·éB3 ÍÅÍ¤¬ÊÌïÌµ½BXMCD Ì³ÍºªèÍCÞâP Õðdqn Mn3GaC É¨¯é Ga K_zIÈáÆµÄCò

úËõ Nov. 2010 Vol.23 No.6  349(C) 2010 The Japanese Society for Synchrotron Radiation ResearchQ [xX
û[ XMCD ðp¢½³ÍUN­¥«ÌÏªCò»¨ RCo2 iRDy, Ho, ErjÉ¨¯é³ºÅÌ­¥«ÌÀè«ÉÂ¢ÄÐî·éB4 ÍÅÍC¡Â«º
XMCD ðpµ½¥«¤ÉÖ·é¡ãÌW]ÉÂ¢Ä
q×éB

2. d X ü¥C~ñF«r[CÆ¿Â«
³­¶u DAC ÍC_Chªd X üÌæÅ§ß¦ª­C©Â­xÅ

é±Æ©çCMbar ÌæÌ³Í­¶àÂ\ÈuÆµÄúËõÀ±ÅL­gp³êÄ¢é B  ³ º XMCD ª è É ¨ ¢ Ä à DAC ª p ¢ ç ê éªC±êÍãLÌÁ¥ÉÁ¦ÄC¬^CyÊ©ÂÈPÈ³Í­¶@\ðLµÄ¢é±Æ©çCNCIX^bgâd

Fig. 1A schematic illustration of diamond­anvil cell (DAC).

¥ÎÌæ¤ÈÀ±uÉeÕÉ±üÅ«C¡Â«ºªèðÀ»Å«é±ÆªRÆµÄ°çêéBFig. 1 É DAC
ÌTª}ð¦·BSÉ¿ºÆµÄð¯½à®KX

PbgiSUS, Re, Be ÈÇjðCÎü·é_ChÉArÌÔÉzuµ²ÝÞB¿ºàÉÍ¿C³
ÍZ³pÌr[²Ì¼É³Í}ÌÅ½³êÄ¨èCArð×d·é±ÆÉæÁÄ¿ºÉ³Íð­¶³¹
éB±ÌCÎü·éArð½sÉÛ¿Èªçç©
É×dð`¦éæ¤ÉuÍÝv³êÄ¢éBArÌæ[aÍ10 mm`1 mmC¿ºÌaÍ»Ì1/3öxÅ
èC­¶³ÍÉæÁÄè³êéB×dÍÁ³lWû®C
wEKXì®û®ÈÇªéBXMCD ªèÉ¨¢ÄÍ X üÌzûðá¸·é½ßÉC³ª 1 mm Ì¬^_ChÉArªÎÅp¢çêéBFig. 2 ÉÍ_ChÌ X ü§ß¦ÌGlM[Ë¶«ð¦µÄ¢
éBg[^Ìú³ 2 mm Ì_ChÉÎµÄC5Fig. 2 X­ray transmissivity for diamond (100 mm and 2 mm inthickness) and beryllium (5 mm) as a function of X­rayenergy. Marks represent absorption­edge energies for typicalmagnetic elements.

keV Ì§ß¦ª10|5 ÈºÆÈé½ßC¿â³}ÌÉæ
ézûâªèÌv¸xðl¶·éÆCd X üÌæi E

i~ÎõÅ`7~1011 photons/sjªB¬³êÄ¢éBDAC

5 keVjÅÌÝ³ºÅÌªèª»ÀIÆ¢¦éBàÌ¿TCYª10 mm öxÅ

Fig. 3 Éd X ü XMCD r[C SPring­8 BL39XUÌõwn¨æÑuÌTª}ð¦·13,14)Bõ¹Ì¼üA
W

[^©çoËµ½ X üÍC_Ch111ñ»ªõíÉæÁÄPF»³êéB

½Îõ X üÍC_C

é±Æ©çC X üWõÍ XMCD Ì¸x»ÉKvsÂÌvfÅ

éB±Ì

KB ~[Ì±üÉæÁÄ³º XMCD ªèÌø¦»ª
iiÉiWµÄ¢éBÜ½CAW[^©çÌ¬³È

px­UÆ_ChªõíÉæé¢GlM[ªðhÚqÉæÁÄ~ÎõÉÏ·³êéBÜ½Cõwn\ÉæÁÄCÚqªpÂ\ÈGlM[ÍÍi5`16b ` à Ì ~  [ ¨ æ Ñ À ± n b ` à Ì Kirkpatrick andkeVjÉjÁÄ0.9ÈãÌ¢~ÎõxªÛ³êÄ¢éB

Baez (KB) ~[ÉæÁÄWõ³êCõÍ 1 õÉ±ÌlÈ X üõwZpÌ­WÉæÁÄC÷¬r[ÅàÎ·éä¦ª10|7 ÈºÜÅ³êéBDAC Éæé³

10|4 ÈºÌo´xÆ¢ S/N äªB¬³ê16,17) C100ºªèÅÍCArÉæéßåÈ X üzûÉæÁÄ 1

GPa ð´¦é´³ XMCD ªèÌ¬÷ÉqªÁ½11)BõÌ¸ªµ­CXMCD XyNgÌ¸xÍõ¬ªÌä¦Éàe¿³êéÌÅCõÌªK{ÅSPring­8 BL39XU Ì¿Â«ÍC¼ÌúËõ{ÝÆärµÄà½ÊÅ

éBTable 1 É¥ÎÆÌgÝí¹Éæ

éB2009NÉÀ±nb`àÉÝu³ê½ KB ~[Éæé¿Â«Ìêð¦·B¥êÌóÁÉÍCÅå¥ê0.6

Á Ä C 0.6 ~ 0.6 mm i FWHM j Ì r [  ª ` 5 ~ 5 mm

T Ìd¥ÎiEMjðp¢éBº·ÅÍCMbar ÌæÜÅiFWHMjÜÅWõ³êéæ¤ÉÈÁ½15) BX üGl

Ì³Í­¶Â\Èp^ DACC¨æÑp easyLab ÐÌM[7.7 keV Å¿ÊuÅÌõqÍC`2~1012 photons/s

DXR_GM ^ DAC ªpÂ\Å

350  úËõ Nov. 2010 Vol.23 No.6

éBÜ½Cd¥ÎÆwðà ¡ d X ü¥C~ñF«Éæé³ºÅÌ¥«¤`¡Â«i³C­¥êCá·jºªèZpÌJ­`Fig. 3

Table 1

Layout of the general set­up for the XMCD experiment at SPring­8 BL39XU.

Available experimental conditions for high­pressure
XMCD measurements at BL39XU of SPring­8.

Magnetic Temperature Pressure
Magnet(K)(GPa)
eld (T)Cryostat

DAC

EM

0.6

11_33020

He­owing

Tiny

EM

0.6

300

150

\

Box

EM

0.4

10_30010

He­closed cycle DXR_GM

SCM

10

2_330

20

SCM (VTI)

Tiny¢é½ßUpÉ§ñªèCêÊÌ³º X üñÜÌÌñÜüðæèÞ±ÆªÅ«æ¤È Bragg p 2uB [45È¢B»±ÅMÒçÍCNaCl ²ð³Í}[J[ÆµÄC»Ì90Bragg UÉæé X üñÜ©çiqèð±«C³Íè·éû@ðJ­µ½14,22)B±Ì90Bragg
UÍCSPring­8 BL39XU ùÝÌÚqÉæÁÄ¼¼
üÎõÜ½Í~ÎõÌØèÖ¦ªeÕÉÅ«ébgð©µ½è@ÅGPa öxÅ

éB±Ìû@Éæé³Íè¸xÍ0.1

éBÊíCDAC Ép¢éArÍP»_ChÅEt[^Cé¢ÍwEzÂ^ÌNCIX^

é½ßCCÓÌ X üGlM[ÅñÜðð½µÄbgÆðgÝí¹é±ÆÉæÁÄá·ªèàÂ\Å­¢ Bragg ½Ëð¶¶éêªéBãÒÍCwEKXÁ³Éæéá·ÅÌ³ÍÂÏðxÌ}È¸­ÆÈèC»ÌÊCzûXyNgÉå«éB±êª§ß X ü­

Á·Æ·éB³çÉ¥êªKvÈêÍC´`±¥ÎÈÆÑiOb`jª»êéB±ÌOb`Ì­¶ðñðiSCMjÉæéÅå10 T Ì¥êªpÂ\ÅéBMÒ·é½ßÉCArÞ¿ÆµÄim½»_Ch

çÍ±Ì´`±¥ÎÉ}üÂ\È¬^ DACiTiny­DACj

i Nano­Polycrystalline Diamond, NPD )23) ð p ¢ ½ DAC

ðJ­µC2 K, 10 T, 20 GPa Æ¢¤¡Â«ÅÌ XMCDÉæé X üzûiXASj¨æÑ XMCD ªèªsíêÄªèðÀ»µ½10,18)BÜ½CÊíÌ§ß@Éæéªèª¢¢é24) BFig. 4(a)É¦·æ¤ÉCNPD Í©F¡ðÑÑÄïÈP»¿âón¿ÈÇÉÎµÄÍCuõ X ü¢éªC°÷¾Éæé¿ºÌÏ@âr[uõuÉ

éB±ÌêCüË X üÉÎµÄæé³ÍªèÉâèÍ³¢BÜ½CNPD ArÍP

90ûü©ç¿ð©ÞÊuÉuõ X üpVRh»_ChÆärµÄàd¢½ßC´³­¶ÉÎ·ÌªèàÀ{Â\ÅtgoíiSDDjðÝuµÄªèðs¤B

éÏ³«ÉàDêÄ¢éB½»ÌÅ³ºÅÌÀ±É¨¢ÄCDAC ¿ºàÌ­¶³ÍÌé NPD ÍGlM[ÉËç¸ñÜðð½·iÇÌGlM[É¨¢Äin situ ªèÍC¨«ðc_·é½ßÌÅàdvÈvfÌ

à Debye Oª­¶µ±¯éjÌÅCOb`Ét[éB³ÍªèÉÍCr[Ì R uõüÌg·V

È XAS XyNgð¾é±ÆªÅ«éBFig. 4(b)ÉC

tgð³ÍÌÖÆµ½r[XP[ªL­p³êÄ

NPD ÆP»_Chðp¢½ DAC Éæé Fe K_¢é19) BR uõüÍCá·ÉÈêÎág·¤ÖC³É

zû[ XAS XyNgÌärð¦·BP»_CêÂÅÈêÎg·¤ÖVtg·é±ÆªmçêÄ¢éBâ@hÉArðp¢½êC½ÌOb`ªXyNg

ÌÞÉ X üª§ßÂ\È§¾Èi}C[ÈÇjãÉÏª³êÄ¨èCf[^ðÍªñíÉ¢ïÆÈéBê

ðp¢êÎCá·Åàr[XP[ðpµ½ in situûÅCNPD ArÅÍCOb`ªS­Ïª³ê¸C³ÍªèªÂ\Åí³ºÆ¯lÌf[^ðÍðs¤±ÆªÅ«éBP»_éBêûCÉá·Å³ðÀ»·é½ßÉÍCO©çÌMtËðÕÁ·éKvªèCDACChðp¢½êCÊíCArÌûÊðÏ¦éÌ¿ºàðÂÅ«È¢B±ÌlÈêCX üð±ÆÅOb`ð·éªCªèGlM[ÌÍÍªLèCêÊIÉÍ Pt â Au¢êâArÌcªÁ·é´³ºÅÍ®SÉ

²ÈÇW¿Éæé X üñÜÉæéû@20,21) ªp¢·é ±ÆÍÅ «È¢B] ÁÄCß¢« C³º ÅÌçêÄ¢éBXMCD ªèÅÍCd¥Îâ´`±¥Îðp

XAS â XMCD ªèÅÍCNPD ðpµ½ DAC ªå¬

pµ½³Íªè@ªsÂÅúËõ Nov. 2010 Vol.23 No.6  351

Fig. 5

Fig. 4(a) Photograph of NPD (left) and single­crystalline (right)
diamond­anvil, and (b) example of glitch­free XAS spec­
trum by using NPD diamond­anvil together with the result
using single­crystalline diamond­anvil.

ÉÈéàÌÆl¦çêéB(a) XMCD spectra at the Ga K­edge in Mn3GaC at several
pressures. Dotted line represents XAS spectrum at 0.5 GPa.
All spectra were measured under the magnetic eld of 0.6 T
at room temperature. (b) Pressure dependence of the peak
A intensity of XMCD for Mn3GaC at room temperature.
The vertical dotted lines represent the phase­transition pres­sures from ferromagnetic to paramagnetic states.

¥«ÌÏ»Í·x¾¯ÅÈ­¥êâ³ÍÉæÁÄà¶¶éB­¥êºÅÍ^¥«]ÚÉæè½­¥«©ç­¥

3. ¤ÌïÌá

«Ö]Ú·é30,31) BÜ½C³ÍºÅÍ Tt Æ TC ª»ê¼ê¸­ÉÁ·é­¥«Ìg£ª Kaneko çÉæè­d X üÌæÌ³º XMCD ÅÍC3d JÚà®³fÌ

©³ê½32)B0.3 GPa ÈãÌ³ÍºÅÍ Mn Ì¥C[

K_zû[i1s¨4p JÚjâ 4f óyÞ³fÌ L2, 3_zû[gªÊq»²©çX¢½Xp­¥«Ì¶Ýà©o³ê

i2p¨5d JÚjÌzû[ª½­p¢çêéB±ÌêCJ

Ä¢éB±Ìæ¤È½ÊÈ¥«Ì­»ðdqóÔÆ¢¤Úæª¥«ðåÉS¤dqi3d, 4f jO¹ÅÍÈ¢±ÆÉ

~NÈÏ_©çc_·é±ÆÍ»¡[¢Bµ½ªÁÄCÁ¦C¼ÌdqO¹ÆÌ¬¬ª­­e¿·é±Æ©çC¾

Mn_Mn Ô£âOêÉÎ·éðµ¤¡Â«ºÌ¤çêéXyNg`óª¡GÆÈèC»Ìðª¢ïÅÍdvÅ

éªC±êÜÅ·xâ¥êÉÎ·é¤Í½

Á½Bµ©µÅßÅÍCÎõÏ²@ÈÇÉæéXyNg

­È³êÄ¢é½ÊC³ÍºÉæé¤Í¥»ªèâ«Ì¸xÉ´x»Æ_vZÌiWÉæÁÄC»ÌðßqUªSÅ

ªiñÅ¢é

25_27) B»ÝÍC±Ì¬¬øÊðp·é±ÆÉæÁÄC³fÊÌñ^ðo·éÝàé28) B±½

è C © Â 1.5 GPa ö x ª ã À ÅÁ

31,32)B»±ÅäXÍCMn3GaC Ì­¥«óÔÌÀè«ðc_±ÅÍC±ÌÁ·ð©µÄÀ{³ê½¡Â«º·éãÅC³ÍÉÎ·é TC Æ Tt ÌÏ»ð Ga K_zû[

XMCD Ì¤áð 2 ÂÐî·éBXMCD ðp¢Ä²×½BGa K_zû[Í E10 keV Ì

3.1

Î·é X ü§ß¦à­ (Fig. 2 QÆjC³ÍºªèªärGlM[ÌæÉ®·é½ßC_ChÉArÉ

Mn3GaC ÉÎ·é³ÍUN­¥«]Ú

ÕðdqnÌ Mn ðÜÞ¥«ÌÍCµÎµÎCMn_MnIeÕÅ

é±Æª_ÆµÄ°çêéBÜ½CGa ÍéÉàÖíç¸CMn 3d_Ga 4p dqO¹Ô£Æ»Ì¥CIÝìpªc_³êÄ«½29) B»Ìñ¥«³fÅæ ¤ È Mn »  ¨ Ì ¤ ¿ C Mn3GaC Í P  È  » \ ¢ÔÌ¬¬ðîµÄ XMCD ªo»µC»êÍ¿Ì¥»Æ

ityuXJCg^jÉàÖíç¸OêÉæÁÄ½ÊÈ

¯lÌUé¢ð¦·33,34)B±êçÌ_©çCMn3GaC¥Cð¦·Bº·Åí¥«Ì Mn3GaC Í TC 248 K

Ìê Ga K_zû[ XMCD Í³ÍºÉKµ½¥Cv[Å­¥«Ö]ÚµC³çÉ·xðº°éÆ Tt 168 K Åu Æ È é B Fig. 5 ( a) É º · Å Ì ã \ I È ³ Í É Î · é}ÈÌÏc£ðºÁÄ½­¥«ÖÆ 1 ]Ú·é31) B

XMCD XyNgð¦·35)Bí¥«ÌæÌí³tßÅÍ

352  úËõ Nov. 2010 Vol.23 No.6

ðà ¡ d X ü¥C~ñF«Éæé³ºÅÌ¥«¤`¡Â«i³C­¥êCá·jºªèZpÌJ­`Fig. 7

Fig. 6(a) XMCD spectra at the Ga K­edge in Mn3GaC at several
pressures. Dotted line represents XAS spectrum at ambientpressure (A.P.). All spectra were measured under the mag­netic eld of 0.6 T at 20 K. (b) Temperature dependence ofthe peak A intensity of XMCD for Mn3GaC for several pres­sures. Black solid line represents the sample magnetization at
A.P. Blue dotted line represents a spontaneous magnetiza­tion curve for J1/2, which is calculated by the classicalmolecular eld theory.

Pressure­Temperature ( P­T ) phase diagram for Mn3GaC.
Green and orange squares denote phase boundaries deter­
mined by this study. Open circles are the previous result ob­
tained by Kaneko et al.32).

é±ÆÉæÁÄC³ÍÌæðåÉg£µ½¥C}ª¾
ç ê ½ B » Ì  Ê ð Fig. 7 É ¦ · B ± Ì  } © ç à
Mn3GaC ÉÎµÄC­¥«ÆÈé·xÌæª³ÍÌÁÆÆàÉgåµÄ¢é±Æª¾ç©ÅéB·Èí¿C

Mn3GaC Í Mn_Mn Ô£Ì¸­ª­¥«ðÀè»³¹éûüÖÆÍ½ç«C9 GPa ÈãÅÍ½­¥«ÍÁ¸µ­¥«ªîêóÔÆÈéÆl¦çêéBFig. 5(a)ÌÊ

XMCD ÍÏª³êÈ¢ªC4 GPa ÈãÅ XMCD ªo»©ç­¥«ªÅàÀè·éÌª14 GPa ßTÉéÆl¦µC³ÍÆÆàÉ»Ì­xªå·éB³çÉ³Íª·çêC»êÈãÌ³ÍÉ¨¢ÄÍC³ÍÌÁÆÆàÉ

ÆCVOi­xª¸­É]¸é±Æª¾ç©ÉÈÁ½B

Mn ´qÍ¥C[gð¸¤ûüÖÆÚs·éBêÊ

Fig. 5(b)ÉC³ÍÌÖÆµÄs[N A Ì­xðvbgÉCiqÌ³kÍohÌLªèðø«N±µCTC Íµ½Êð¦·B±Ì}©çCº·ÅÍ 4 GPa ÈãÅ­¸­·éûüÉÍ½ç­ªC{¤Å©çê½Á³Éæé

¥«ÉNö·é XMCD ª­»µC14 GPa ßTÅÅå

TC Ì  Á Í C Mn _Mn Ô  £ Ì û k É º ¤ Ruderman­lðÆèC»ÌãÁ³ÉæÁÄ}É¸­µÄ¢­lqª

Kittel­Kasuya­YosidaiRKKYjÝìpÌ­ª Mn 3dí©éB±Ì¸­ðO}·é±ÆÅCXMCD ª 0 ÆÈé¥C[gÔÌ­¥«IÌ­»Éñ^·éÆl¦³Íªñ32 GPa Æ©ÏàçêC»±Å­¥«ªÁ¸·çêéBMn3GaC ÅÍC±Ì TC ÌÁÆ¸­Éñ^·ééÆl¦çêéBKaneko çÉæÁÄ­©³ê½Á³ÉæøÊª£µÄ¢éàÌÆl¦çêC{ÊÍC14 GPa

é TC Ìã¸ÍC1.4 GPa ÈãÅàÏª³êCº·Åà­ßTÅ­¥«ªÅàÀèµÄ¢éÆ_t¯é±ÆªÅ«¥«ª³ÍÉæÁÄUN³êé±Æª¾ç©É³ê½B

éB

³çÉ Tt Ì¸­ÉÂ¢Äà²×½BFig. 6(a)ÉC20 K½­¥«Ì½ß XMCD ÍÏª³êÈ¢ªCº·Æ¯l[xX»¨ RCo2 iRDy, Ho, ErjÉÎ
·é³ºÅÌ­¥«Àè«ÉÁ³ÉæÁÄ­¥«ªUN³ê½ÊCXMCD ªoóyÞ³fiRjÆ 3d JÚà®³fÆÌàÍC»ÌÉ¨¯é XMCD XyNgÌ³ÍÏ»ð¦·Bí³ÅÍ

3.2»·éB»ÌVOi­xÍ³ÍÆÆàÉå·éBe³g¬ÆOêÉË¶µ½½ÊÈ¥«ð¦·BÁÉ[xXÍÉÂ¢Ä Tt ðè·é½ßÉCs[N A Ì­xÌ·x»¨ RCo2 ÍÕðdq¥«ÌT^¨¿ÌêÂÅèCË¶«ð Fig. 6(b)Évbgµ½B·x_ª­È¢½ß

TC ßTÅ»iqªc£·é°È¥CÌÏøÊðÁ¥É Tt Æ TC Ìè¸xÍ­ÍÈ¢ªC³ÍÌÁÉºÆ·é36)BR ªdóyÞ³fÌêCR Æ Co Ì¥C[¢ Tt Ì¸­¨æÑ TC ÌÁª¾ç©ÆÈÁ½B{¤gª½­¥«IÉzñ·étF¥«Ö]Ú·éBÅß½ Tt ¨æÑ TC ðCKaneko çÌ P_T }ÉÁ¦±Ì¥C]ÚÆ¥CÌÏøÊÌ@\ÆµÄ Co Ì¥CúËõ Nov. 2010 Vol.23 No.6  353

Fig. 8XMCD spectra at the R L2­edge under several pressures in(a) DyCo2, (b) HoCo2 and (c) ErCo2. Dotted lines
represent XAS spectra of RAl2. All spectra were measured at
H5 T, T5 K.

[gÌsÀè«ªc_³êÄ«½36,37)BRCo2 Ì Co
3d dqóÔÍ»Ì¥CªÉðÀè»³¹éÕEðÉBµÄ¨ç¸CR Ì¥C[gªìèo·­¢à¥ê

Fig. 9Relative Co magnetic moment MCo( P)/MCo(A.P.) as afunction of pressure. Dotted, dashed, and solid lines
represent the tting results for the linear function.

ÉæÁÄ¥CªÉð¶¶éÆl¦çêéBRDy, Ho, ErÌ RCo2 ÍC»ê¼ê TC 137 K, 78 K, 32 K Å¥»ÉÆ½ MCo Ì³ÍÏ»ÅèCí³Ì MCo ð 1 ÉKi»µ½

é38)BêûC³àÌðärµÄ¢éB»ÌÊCR ÉËç¸ MCo Í³ÍÍºÅÍCá³ÌæÉ¨¢Ä TC Í¼üIÉ¸­·éªC

ÆÆàÉ¼üIÉ¸­·é±Æª¦³ê½BÜ½CR

Ñª¶¶éi1 ]ÚjtF¥«ÌÅ

ÕE³Í Pc æè³¤ÅÍ TC Íêè·xÖÆßÃ«C

Ho Æ Er ÅÍCñ 5 GPa Å MCo ªÁ¸·éÌÉÎµCR¯É¥»Ì·xÏ»ªA±IÈ 2 ]ÚÖÚs·éBPcDy ÅÍí³©çÌ MCo Ì¸­Êª¼ªöxÆ¬³¢BÍ R Ì´qÔÌÁÉºÁÄ¬³­Èén«ª èC

RHo Æ Er ÅÍ Pc ÈãÌ 2 ]ÚÌ³ÍÌæÅà MCo

RDy ÅÍ Pc 4 GPa39) CRHo, Er ÅÍ»ê¼ê Pc Íí³Ìñ¼ªªc¶µC5 GPa ÈãÅ R Ì¥C[éB±Ì°È³ÍÏ»ÉÍ Co 3d dg¾¯ª­¥«·éÆl¦çêéB±ÌÊ©çCqÌ¥«ÆÌ­¢ÖªúÒ³êéªC±êÜÅdCïR

DyCo2 Í HoCo2 â ErCo2 æèàÁ³ÉÎµÄÀèÈ Co

3.0, 2.5 GPa40)Å

¦âäMÈÇÉæéÔÚIÈc_É¯ÜÁÄ¨è40,41)C±Ì¥CóÔðL·éÆ¢¦éB»Ì´öÆµÄ Dy ÉRêð¼ÚIÉØµ½À±ÍÈ©Á½B»±ÅMÒçÍC

µ½à¥êÆ»iqÌåªl¦çêéªC»ÌÇ¿

RCo2 ÉÎµÄ R L2 _zû[ÅÌ XMCD XyNg©ççª Co Ì¥CóÔÉñ^·é©ÍÜ¾_ÉÁÄ¢È

Co 3d dqÌ¥«Ì³ÍÏ»ÌÝðoµC»Ì R Ë¶

¢B»ÝCtF¥«ÅÌ³k¦ªèðißÄ¨èC»«ð²×½42,43)BÌÊª­¥«Àè«ÉÖ·éLvÈîñð^¦éàÌÆ

Fig. 8 ÉCã\IÈ³ÍÉÎ·é RCo2 Ì R L2 _zû[úÒ³êéB

XAS ¨æÑ XMCD XyNgð¦·BXMCD XyNg
Í©ç³ÖÆÏ»·éªU^`óÅèC»Ì³ÍÏ

4. ÜÆßÆ«W]»ÍåÉÌs[NiFig. 8 ÌîójÉÏª³ê½B±
ÌGlM[ÊuÌ XMCD ÅÍCR É×Úµ½ Co ªL{eÅÍCÅßÌ³º XMCD ÌiWÉÂ¢ÄCÀ±·é¥C[gÌe¿ª R 5d_Co 3d O¹¬¬ðîµuÆ¤áð¦µÄTàµ½B±±ÅÐîµ½Äo»·é28) B³ÍÌÁÆÆàÉC·×ÄÌ R ÉÎµMn3GaC Ì ³ Í U N ­ ¥ « â RCo2 É ¨ ¯ é Co Ì ¥ CÄÌs[NÌ­xªåµÄ¨èC`4 GPa ÅÍXyN

[gÌsÀè«ÍCXMCD ÌÁ·ÆªèZpÌig`óªQÆ¿Ì RAl2 Ì»êÉßÃ­BRAl2 ÅÍàÉæÁÄßÄ±©ê½¤¬ÊÅ¥«´qÍ R ÌÝÅ

éB±Ì¼ÉàCé½ßC×Ú¥«´q©çÌe¿¥CÉÖ·é¤10,44_47)C¿h®n¨¿ÉÖ·é¤ÍÈ¢B]ÁÄ³¤ÅÝçê½ RCo2 Æ RAl2 Ì XMCD48) C ¥ C Ì Ï ø Ê É Ö · é ¤ 49_51) È Ç ª  ³ º

XyNgÌÞÍCÁ³Éæé Co Ì¥C[gÌXMCD Ì¬ÊÆµÄ°çêéBäXÍCu³vÆ¢¤¸­ð¦µÄ¢éÆl¦çêéBOêp[^ÉÁ¦Cá·C­¥êÆÌZÉæÁÄ¡{¤ÅÍ RCo2 Æ RAl2 Ì XMCD Ì·ªðoµC

Â«º XMCD ð\zµ½BªèÌæÌg£ÉæÁÄ¾»ÌÏª­xª Co Ì¥C[giMCojÉäá·éçê½¥C}ÍCVïÌ¥CÉBÅ«é¾¯ÅÈ

ÆµÄ MCo ðß½42)BFig. 9 ÍC±ÌðÍ©ç±o³ê

­C}NÈ¨«ªè¾¯ÅÍ¾çêÈ¢³fIðI©Â

354  úËõ Nov. 2010 Vol.23 No.6

ðà ¡ d X ü¥C~ñF«Éæé³ºÅÌ¥«¤`¡Â«i³C­¥êCá·jºªèZpÌJ­`dqkIðIÈ´qxÅÌm©ðñ·é½ßC¨«¤ÒÌV½È»¡ðä«Â¯Ä¢éB6)¡ãC»ê¼êÌOêªuÉÀvÌÌæÖßÃ­±ÆÅCXMCD Éæéu½dÉÀÂ«vÅÌ¨«¤ªWJ³ê

7)éB»±ÅÍ¡ÌOêp[^ªUN·éÊq]ÚÌîb¨«ÆdqóÔC³ºÅÌV¨¿¬Æ»Ì»w
óÔ¨æÑ¨«Ï»CnÇCnàÌ¨¿\¢Æ¨«Ï»Èf¯ÈwÉà¥Ýñ¾¢¥Ì¨»Ûª¤Î8)9)

ÛÆÈé¾ë¤BÉá·imK ÌæjÌ XMCD ªèÍ¢¾ ñ  ª È ¢ ª C p  X ¥ ê É æ é 40 T Ì ­ ¥ ê º

10)

XMCD ªèÍùÉÀ»µÄ¨è50) C³çÉ¥êÖÌWJàúÒ³êéBÜ½C³ÍÅÍ DAC Éæé400 GPaðz¦éÃIÈ³Í­¶ªÂ\ÆÈÁ½55) BÂXÌÉ[ððZµ½u½dÉÀÂ«vXMCD ªèðÀ»·é½ßÉÍC½­ÌuJ­àKvÆÈÁÄ­éBá¦ÎC
À±ðÉË¶µÈ¢»ÌêÅÌ³Í§ä@\Cóßâ

11)

12)

@Ö±üÂ\È DAC âpX¥êÉÎÂ\Èñà®É13)´¬^ DAC ÈÇª°çêéBÜ½Cu½dÉÀÂ«v

14)Í»êðÛÅ«éÔªªèÌ¥¬ÆÈë¤B»Ìæ¤ÈÂ«ºÅÌªõªèÉÍúËõÌpXÁ«ÆÌ«ª15)

æ¢B»ÝCJ­ªißçêÄ¢é XFEL â ERL ª¶Ýo·´PxZpXõªu½dÉÀÂ«vXMCD ÆZ
·é±ÆÅCí¯ð´¦½¨»ÛÌ­©ÉqªéÆúÒµÄ¢éB

16)

17)

Ó«
±±ÅÐî³ê½àeÍCPxõÈw¤Z^[ÌåÎ×¶CéØî°CqmêNC{Cå´¡FCLåwÌ{{Ë¾Cn²^ñC¤QåwÌütOjCZFdHÌpJÏCtX§Èw¤
Z^[iCNRSjÌ D. Fruchart CÈçÑÉXyC
 Zaragoza åwÌ J. Chaboy ÆÌ¤¯¤ÉæéàÌ
Å

éB±±É´Ó¢½µÜ·BÜ½C±êçÌ¤ÍÈw¤ïáè¤iBjÛèÔ16740203C¨æÑîÕ¤

18)
19)
20)
21)
22)

iBjÛèÔ12440103Ìâðó¯ÄÀ{³êCSPr­
ing­8 p¤ÛèiÛèÔ2000A0383,

2001A0427,

2002A0489,

2004A0020,

2003A0653,

2003A0654,

2005A0176, 2007A2061, 2007B1402, 2008A1972jÌºÅi³ê½àÌÅ

2)
3)
4)
5)

24)

éB

Ql¶£
1)

23)

G. Schutz, W. Wagner, W. Wilhelm, P. Kienle, R. Zeller, R.
Frahm and G. Materlik: Phys. Rev. Lett. 58, 737 (1987).
C. T. Chen, F. Sette, Y. Ma and S. Modesti: Phys. Rev. B42,7262 (1990).
T. Koide, T. Shidara, M. Yuri, N. Kandaka and H. Fukutani:Appl. Phys. Lett. 58, 2592 (1991).
B. T. Thole, P. Carra, F. Sette and G. van der Laan: Phys.
Rev. Lett. 68, 5291 (1992).
P. Carra, B. T. Thole, M. Altarelli and X. Wang: Phys. Rev.

25)
26)
27)
28)

29)
30)
31)

Lett. 70, 694 (1993).
D. Haskel, Y. C. Tseng, N. M. Souza­Neto, J. C. Lang, S.
Sinogeikin, Ya. Mudryk, K. A. Gschneidner Jr. and V. K.
Pecharsky: High Pressure Research 28, 185 (2008).
F. Baudelet, O. Mathon, J. P. Iti áe, A. Polian, J. P. Kappler
and S. Pascarrelli: J. Phys.: Condens. Matter 21, 346003(2009).
G. Aquilanti, O. Mathon and S. Pascarelli: J. SynchrotronRad. 16, 699 (2009).
N. Ishimatsu, Y. Ohishi, M. Suzuki, N. Kawamura, M. Ito,
H. Maruyama, S. Nasu, T. Kawakami and O. Shimomura:
Nucl. Instrum. Meth. Phys. Res. A467_468, 1061 (2001).
N. Kawamura, S. Tsutsui, M. Mizumaki, N. Ishimatsu, H.
Maruyama, H. Sugawara and H. Sato: J. Phys.: Conf. Ser.
190, 012020 (2009).
N. Ishimatsu, H. Maruyama, N. Kawamura, M. Mizumaki,
H. Yumoto, H. Ohashi, T. Matsuoka, Y. Ohishi and M.
Suzuki: in preparation.
M. Suzuki, N. Kawamura, M. Mizumaki, A. Urata, H.
Maruyama, S. Goto and T. Ishikawa: Jpn. J. Appl. Phys. 37,
L1488 (1998).
Î¼¼÷C¢R TCÍº¼ÈFú{»wï 49, 279(2007).
N. Kawamura, N. Ishimatsu and H. Maruyama: J. Synchro­tron Rad. 16, 730 (2009).
H. Yumoto, K. Hirata, A. Nisawa, G. Ueno, M. Sato, J. Y.
Son, T. Koganezawa, M. Machida, T. Muro, I. Hirosawa, M.
Suzuki, N. Kawamura, M. Mizumaki, H. Ohashi, M.
Yamamoto, Y. Watanabe and S. Goto: Proc. of SPIE 7448,
74480Z (2009).
Y. Yamamoto, T. Miura, M. Suzuki, N. Kawamura, H.
Miyagawa, T. Nakamura, K. Kobayashi, T. Teranishi andH. Hori: Phys. Rev. Lett. 93, 116801 (2004).
J. S. Garitaonandia, M. Insausti, E. Goikolea, M. Suzuki, J.
D. Cashion, N. Kawamura, H. Ohsawa, I. G. de Muro, K.
Suzuki, F. Plazaola and T. Rojo: Nano Lett. 8, 661 (2008).
N. Ishimatsu, M. Yamada, H. Maruyama, N. Kawamura and
M. Suzuki: SRMS­5 Conference, SRMS5_185, (2006).
H. K. Mao, P. M. Bell, J. W. Shaner and D. J. Steinberg: J.
Appl. Phys. 49, 3276 (1978).
N. C. Holmes, J. A. Moriarty, G. R. Gathers and W. J. Nellis:
J. Appl. Phys. 66, 2962 (1989).
O. L. Anderson, D. G. Isaak and S. Yamamoto: J. Appl.
Phys. 65, 1534 (1989).
N. Ishimatsu, H. Maruyama, N. Kawamura, M. Suzuki, Y.
Ohishi and O. Shimomura: Nucl. Instrum. Methods Phys.
Res. B238, 167 (2005).
T. Irifune, A. Kurio, S. Sakamoto, T. Inoue and H. Sumiya:Nature 421, 599 (2003).
K. Matsumoto, H. Maruyama, N. Ishimatsu, N. Kawamura,
M. Mizumaki, H. Yumoto, H. Ohashi, M. Suzuki, T. Irifuneand H. Sumiya: submitted to J. Phys. Soc. Jpn.
J. Igarashi and K. Hirai: Phys. Rev. B50, 17820 (1994).
K. Asakura, J. Nakahara, I. Harada, H. Ogasawara, K.
Fukui and A. Kontani: J. Phys. Soc. Jpn. 71, 2771 (2002).
I. Harada, K. Asakura, A. Fujiwara and A. Kotani: J. Elec.
Spectrosc. Relat. Phenom. 136, 125 (2004).
J. Chaboy, M. A. Laguna­Maruco, C. Piquer, R. Boada, H.
Maruyama and N. Kawamura: J. Synchrotron Rad. 15, 440(2008).
T. Kanomata, K. Shirakawa and T. Kaneko: J. Mag. Mag.
Mater. 65, 76 (1987).
D. Fruchart and E. F. Bertaut: J. Phys. Soc. Jpn. 44, 781(1978).
K. Kamishima, M. I. Bartashevich, T. Goto, M. Kikuchi andúËõ Nov. 2010 Vol.23 No.6  355

32)
33)
34)
35)
36)
37)
38)
39)
40)
41)
42)

43)

44)

T. Kanomata: J. Phys. Soc. Jpn. 67, 1748 (1998).
T. Kaneko, T. Kanomata and K. Shirakawa: J. Phys. Soc.
Jpn. 56, 4047 (1987).
N. Kawamura, H. Maruyama, M. Suzuki and T. Ishikawa: J.
Phys. Soc. Jpn. 76, 074716 (2007).
M. Takahashi and J. Igarashi: Phys. Rev. B67, 245104(2003).
N. Kawamura, N. Ishimatsu, M. Isshiki, Y. Komatsu and H.
Maruyama: Physica Scripta T115, 591 (2005).
E. Gratz and A. S. Markosyan: J. Phys: Condens. Matter 13,
R385 (2001).
H. Yamada, J. Inoue, K. Terao, S. Kanda and M. Shimizu: J.
Phys. F: Met. Phys. 14, 1943 (1984).
R. Minakata, M. Shiga and Y. Nakamura: J. Phys. Soc. Jpn.
41, 1435 (1976).
N. Ishimatsu, H. Maruyama, N. Kawamura, Y. Ohishi and
O. Shimomura: Nucl. Instrum. Methods B238, 167 (2005).
O. Syshchenko, T. Fujita, V. Sechovsk'y, M. Div²s and H.
Fujii: J. Alloys Compd. 317_318, 438 (2001).
R. Hauser, E. Bauer and E. Gratz: Phys. Rev. B57, 2904
(1998).
N. Ishimatsu, S. Miyamoto, H. Maruyama, J. Chaboy, M. A.
Laguna­Marco and N. Kawamura: Phys. Rev. B75, 180402(2007).
S. Watanabe, N. Ishimatsu, H. Maruyama, J. Chaboy, M. A.
Laguna­Marco, R. Boada and N. Kawamura: J. Phys.: Conf.
Ser. 190, 012021 (2009).
N. Ishimatsu, H. Maruyama, N. Kawamura, M. Suzuki, Y.
Ohishi, M. Ito, S. Nasu, T. Kawakami and O. Shimomura: J.

45)

46)

47)
48)

49)

50)

51)
52)

53)

Phys. Soc. Jpn. 72, 2372 (2003).
E. Duman, M. Acet, E. F. Wassermann, J. P. Itie, F. Baude­let, O. Mathon and S. Pascarelli: Phys. Rev. Lett. 94, 075502(2005).
N. Ishimatsu, H. Maruyama, N. Kawamura, M. Suzuki, Y.
Ohishi and O. Shimomura: J. Phys. Soc. Jpn. 76, 064703(2007).
N. M. Souza­Neto, D. Haskel, Y. C. Tseng and G. Lapertot:
Phys. Rev. Lett. 102, 057206 (2009).
K. Matsubayashi, N. Katayama, K. Ohgushi, K. Munakata,N. Kawamura, M. Mizumaki, N. Ishimatsu, M. Isobe, Y.
Ueda, M. Hedo, I. Umehara and Y. Uwatoko: submitted toPhys. Rev. B.
P. Gorria, D. Martinez­Blanco, M. J. Perez, J. A. Blanco, A.
Hernando, M. A. Laguna­Marco, D. Haskel, N. Souza­Neto,R. I. Smith, W. G. Marshall, G. Garbarino, M. Mezouar, A.
Fernandez­Martinez, J. Chaboy, L. F. Barquin, J. A.
Rodriguez Castrillon, M. Moldovan, J. I. Garcia Alonso, J.
Zhang, A. Llobet and J. S. Jiang: Phys. Rev. B80, 064421(2009).
L. Nataf, F. Decremps, J. C. Chervin, O. Mathon, S. Pas­
carelli, J. Kamarad, F. Baudelet, A. Congeduti and J. P. Itie:
Phys. Rev. B80, 134404 (2009).
H. Maruyama, N. Ishimatsu, D. Kaneda and N. Kawamura:in preparation.
Y. H. Matsuda, Z. W. Ouyang, H. Nojiri, T. Inami, K. Ohwa­da, M. Suzuki, N. Kawamura, A. Mitsuda and H. Wada:
Phys. Rev. Lett. 103, 046402 (2009).
ÔlTêCìºt÷F³ÍÌÈwÆZp 19, 248 (2009).

 ÒÐî 
Íº¼È

àc@l PxõÈw¤Z^[iJASRI/SPring­8)Éå²¤õE­mail: naochanspring8.or.jpêåFX ü¥Cªõ
mªðn
1999NªRåwåw@©RÈw¤È¨¿ÈwêUmÛöC¹Cmiw)B
1999N_2001N»w¤d¤X ü±Âõw¤ºîbÈwÁÊ¤
õB2001N_PxõÈw¤Z^[¤õB2005N 4 æè»EB

Î¼¼÷

Låwåw@w¤ÈÉ³E­mail: naokisci.hiroshima­u.ac.jpêåFúËõÉæé³¨«mªðn
1999NHÆåwåw@Hw¤ÈÞ¿ÈwêUmÛöC¹Cmiw)B1999N_2001Nú{´qÍ¤Ö¼¤m¤õB2001N 9 æè»EB

356  úËõ Nov. 2010 Vol.23 No.6

¢R

T

Låwåw@w¤ÈÉ³ö
E­mail: maruyamasci.hiroshima­u.ac.jpêåFX ü¥CªõC¥«¨
mªðn
1980NªRåwåw@w¤ÈCm
ÛöC¹B1981_1983NtX§Èw¤Z^[¥ê¤qõ¤õB
1985N_1993NªRå wwèC(1986NCwmCLåw)B1993
N_2000N¯³öB2001Næè»EBðà ¡ d X ü¥C~ñF«Éæé³ºÅÌ¥«¤`¡Â«i³C­¥êCá·jºªèZpÌJ­`Study of magnetism at high pressure using x­raymagnetic circular dichroism in hard x­ray region`Development of XMCD measurement underhigh pressure, high magnetic eld andlow temperature`
Naomi KAWAMURA
Naoki ISHIMATSU
Hiroshi MARUYAMAJapan Synchrotron Radiation Research Institute (JASRI/SPring­8),
1_1_1 Kouto, Sayo, Hyogo 679_
5198, Japan
Graduate School of Science, Hiroshima University
1_3_1 Kagamiyama, Higashi­Hiroshima, Hiroshima 739_8526, Japan
Graduate School of Science, Hiroshima University
1_3_1 Kagamiyama, Higashi­Hiroshima, Hiroshima 739_8526, Japan

Abstract

X­ray magnetic circular dichroism (XMCD) is a powerful tool to investigate the electronic andmagnetic states for constituent element in ferromagnetic materials. Recently, study of magnetism under mul­
tiple conditions such as high pressure, high magnetic eld, and low temperature, has been actively performedat the third generation synchrotron radiation facilities. To realize the XMCD measurement with high accuracy
and high sensitivity, a focusing mirror system, in situ pressure measurement, and sample environments underthe multiple conditions have been installed at SPring­8 BL39XU. Consequently, 2 K, 10 T, and 170 GPa condi­tion is available for the XMCD measurements. The XMCD under multiple conditions has now opened out a
new approach to material science.

úËõ Nov. 2010 Vol.23 No.6  357