-Interface effects on the magnetic moment of Co and Cu in CoCu granular alloys

被引：23
作者：
Prieto, AG
Fdez-Gubieda, ML
Chaboy, J
Laguna-Marco, MA
Muro, T
Nakamura, T
机构：
[1] Univ Basque Country, Dept Elect & Elect, E-48080 Bilbao, Spain
[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
[3] Univ Cantabria, CITIMAC, E-39005 Santander, Spain
[4] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795148, Japan
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.72.212403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on x-ray magnetic circular dichroism experiments performed on Co5Cu95 annealed granular alloys with giant magnetoresistance. Results on the Co-L-2,L-3 edge evidence a direct correlation between the Co orbital and spin magnetic moment and the Co clusters interfacial roughness. On the other hand, we have found dichroism on the Cu-L-2,L-3 edge, revealing an induced magnetic polarization of the Cu interfacial atoms. The magnetic moment of the Cu atoms is mainly of spin character and is ferromagnetically coupled with the Co magnetic moment.
引用
收藏
页数：4
相关论文
共 25 条
  • [1] GIANT MAGNETORESISTANCE IN HETEROGENEOUS CU-CO ALLOYS
    BERKOWITZ, AE
    MITCHELL, JR
    CAREY, MJ
    YOUNG, AP
    ZHANG, S
    SPADA, FE
    PARKER, FT
    HUTTEN, A
    THOMAS, G
    [J]. PHYSICAL REVIEW LETTERS, 1992, 68 (25) : 3745 - 3748
  • [2] Orbital magnetism of transition-metal adatoms and clusters on the Ag and Au(001) surfaces
    Cabria, I
    Nonas, B
    Zeller, R
    Dederichs, PH
    [J]. PHYSICAL REVIEW B, 2002, 65 (05): : 1 - 9
  • [3] X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS
    CARRA, P
    THOLE, BT
    ALTARELLI, M
    WANG, XD
    [J]. PHYSICAL REVIEW LETTERS, 1993, 70 (05) : 694 - 697
  • [4] EXPERIMENTAL CONFIRMATION OF THE X-RAY MAGNETIC CIRCULAR-DICHROISM SUM-RULES FOR IRON AND COBALT
    CHEN, CT
    IDZERDA, YU
    LIN, HJ
    SMITH, NV
    MEIGS, G
    CHABAN, E
    HO, GH
    PELLEGRIN, E
    SETTE, F
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (01) : 152 - 155
  • [5] DUNN JH, 1995, J PHYS C SOLID STATE, V7, P1111
  • [6] Quenching of ferromagnetism in cobalt clusters embedded in copper
    Eastham, DA
    Qiang, Y
    Maddock, TH
    Kraft, J
    Schille, JP
    Thompson, GS
    Haberland, H
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (37) : L497 - L502
  • [7] Doubling of the orbital magnetic moment in nanoscale Fe clusters
    Edmonds, KW
    Binns, C
    Baker, SH
    Thornton, SC
    Norris, C
    Goedkoop, JB
    Finazzi, M
    Brookes, NB
    [J]. PHYSICAL REVIEW B, 1999, 60 (01): : 472 - 476
  • [8] Direct experimental evidence of an anomalous Co segregation in Co-Cu granular alloys and its influence on magnetoresistance
    Fdzez-Gubieda, ML
    Prieto, AG
    García-Arribas, A
    Meneghini, C
    Mobilio, S
    [J]. EUROPHYSICS LETTERS, 2002, 59 (06): : 855 - 861
  • [9] Giant magnetic anisotropy of single cobalt atoms and nanoparticles
    Gambardella, P
    Rusponi, S
    Veronese, M
    Dhesi, SS
    Grazioli, C
    Dallmeyer, A
    Cabria, I
    Zeller, R
    Dederichs, PH
    Kern, K
    Carbone, C
    Brune, H
    [J]. SCIENCE, 2003, 300 (5622) : 1130 - 1133
  • [10] Influence of conduction electrons on the magnetism of cobalt grains in a copper matrix studied by density-functional theory -: art. no. 134404
    Gómez, JA
    Guenzburger, D
    [J]. PHYSICAL REVIEW B, 2001, 63 (13)
123