?????? Co-Cr ?????? - PowerPoint PPT Presentation

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?????? Co-Cr ??????

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Title: ?????? Co-Cr ??????


1
????????????? ? ?????????????? ???????????
??????????? ????????? ????????
  • ???????? 1-?? ???? ???????? ????????? ?.?.

2
???????-??????? ???????????
?????? Co-Cr ??????
??????? ?.?., ?????? ??????????? ????????
???????????
3
???????????? ???????????
Ren Chao Che, Chong Yun Liang, Xiang He et
al. Sci. Technol. Adv. Mater. 12, 025004 (2011)
4
???? ????????. ?.1????????????? ????
  • ????????? ???????? ???????? ????????????? ?????
    (XMCD)
  • ????????? ????????????? ??????????? (???????????)
  • ?????????????? ?????????????? ????????? ?
    ????????? (??????)

5
????????? ???????? ???????? ????????????? ?????
(XMCD)
6
X-ray absorption spectroscopy (XAS)
7
X-ray magnetic circular dichroism
J.J. Rehr, R.C. Albers, Rev. Mod. Phys. 72, 621
(2000)
8
????????????? ??????????
Photoemission electron microscope, SPELEEM_at_BL17SU
, Japan ?????????? 22 ??
http//www.spring8.or.jp/
9
????????????? ??????????
X-ray transmission microscope (?????????? ??????
????????? ???????) XM-1, Berkley ?????????? 15 ??
D.-H. Kim, P. Fischer, W. Chao et al., J. Appl.
Phys. 99, 08H303 (2006)
10
?????????????? ?????????????? ????????? ?
????????? (???????????????? ??????)
11
?????? ??????? ??????????????
??????? ??????? ?????
12
???????? ??????????? ???????
13
?????? ????????? 3d ??????????????Fe, Ni, Co
??????? ?????????????? ????? ??????????? ????????
????????? ????????? ?? ??????? ?????????? 3d-????
???????? ? ????????? ???????????? ??????????
????
down
up
????????? ????????? Ni, ?????? ?????????
??????? ?.?. ??????? (1976)
14
????????????? ??????? ? ???????????? ?????????
?????????
15
???? ????????. ?.2?????????
  • ?????????????? ??????? ?????????? ? ?????????
    (??????)
  • ????????? ????????? ???????? ??????????????
    ?????? ?????????? (EMCD)
  • EMCD ? ?????????????? ??????????? ???????????
    (???)
  • ????????? ??????? EMCD ? XMCD

16
?????????????? ??????? ?????????? ? ?????????
17
???????? ? ??????????? ???????.?????? ??????????
?.?. ??????, ?.?. ??????, ???? ?????????????
??????. ?.3. ????????? ????????, ????????????????
??????
18
???????????????? ??????? ?????????
19
???????? ????? ??????????? ????????????? ????? ?
????????? ?????????? ??????????
Electron Energy loss near edge structure (ELNES)
?
X-ray absorption near edge structure (XANES)
A.P. Hitchcock, Jpn. J. Appl. Phys. 32 (suppl.2),
176 (1992)
20
????????? ????????? ???????? ??????????????
?????? ?????????? (EMCD)
21
???????? ??????????? ??????????
22
??????????? ????-???????
???? ????????????? ?????? ???? ???? ?? f, ??
P.Neilhebel et al., Phys. Rev. Lett. 85, 1847
(2000)
23
?????????? ???????????? ????-??????? ? ???
  • ???????? ????????????? ??????????????? ?????????
  • ???????? ??? ??????????? ?????????
    ??????????????? ??????????? ?????????
  • ???????? ?????? ???? ?????????????? ????-???????
  • ?????? ???????????
  • P. Schattschneider, S. Rubino, C. Hebert et al.
  • Nature 441, 486 (2006)

24
???????????? ??????????? ? ????????????? ???????
? ???
25
????????????? ? ???????????? ???????????
26
?????????? ??? ? ?????????????? ????????
27
??????? ?????????? EMCD
L. Calmels, F. Houdellier, B. Warot-Fonrose et
al., Phys. Rev. B 76, 060409 (2007) J. Rusz, S.
Rubino, P. Schattschneider, Phys. Rev. B 75,
214425 (2007)
28
????????? EMCD
  1. ??????????? ????????????? ???????
  2. ?????? EMCD

29
EMCD ? ?????????????? ??????????? ???????????
30
????????? ??????????? ???????? ??????????
????? II ???????? I I
P. Schattschneider, M. Stogger-Pollach, S. Rubino
et al. Phys. Rev. B 78, 104413 (2008)
31
????????????? ??????????????? ? ????????
????????????
EMCD Fe-L3
EMCD Fe-L2
H. Lidbaum, J. Rusz, S. Rubino, Ultramicroscpy
110, 1380 (2010)
32
????????????? ??????????????? ? ????????
????????????
???????? Magnetospirillum magnetotacticum
M. Stuger-Pollacha, C.D. Treiber, G.P. Resch et
al., Micron 42, 456 (2011)
33
????????? ??????? XMCD ? EMCD
  • XMCD
  • ???????? ???????? ???????? ????? ?????????
  • ????????????? ????? ????????????? ????????
  • ?????? ??????????? ?????????? (10 ??)
  • EMCD
  • ??????????? ??? ? ?????????????? ????????
  • ??????? ??????????? ?????????? (2 ??)
  • ??????? ?????? ????? ??????????????? ????????? ??
    ??????????????? ?????????

34
??????? ?? ????????!
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