Disorder-induced reversal of spin polarization in the Heusler alloy Co2FeSi

被引：36
|
作者：
Bruski, P. [1 ]
Erwin, S. C. [2 ]
Ramsteiner, M. [1 ]
Brandt, O. [1 ]
Friedland, K. -J. [1 ]
Farshchi, R. [1 ]
Herfort, J. [1 ]
Riechert, H. [1 ]
机构：
[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
[2] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 14期
关键词：
MAGNETIC-MOMENT; TEMPERATURE; GROWTH; ENERGY; FILMS;
D O I：
10.1103/PhysRevB.83.140409
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the spin polarization in the conduction band of Co2FeSi layers with a different degree of structural order. The injected spin polarization in Co2FeSi/(Al,Ga)As spin light-emitting diodes as well as the planar Hall effect measured for the Co2FeSi injectors exhibit a sign reversal between injectors crystallized in the ordered L2(1) phase and the Fe-Si disordered B2 phase. These results are explained by a disorder-induced change in the spin polarization at the Fermi energy of Co2FeSi. Support for the occurrence of such a striking change in the electronic band structure is obtained by first principles calculations.
引用
收藏
页数：4
相关论文
共 50 条
  • [41] Structure of the ground and excited states in the Co2FeSi Heusler alloy according to the resonant photoemission data
    V. I. Grebennikov
    A. Buling
    M. Neumann
    V. V. Marchenkov
    T. V. Kuznetsova
    Journal of Structural Chemistry, 2015, 56 : 511 - 516
  • [42] Generation and Detection of a Pure Spin Current using Co-Based Heusler-Alloy Spin Injector and Detector: Comparison of Co2MnSi and Co2FeSi
    Oki, S.
    Kawano, M.
    Tanikawa, K.
    Aoki, H.
    Yamada, S.
    Miyao, M.
    Hamaya, K.
    MAGNETIC MATERIALS, PROCESSES, AND DEVICES 12, 2012, 50 (10): : 245 - 251
  • [43] Nonlocal, local and extraction spin valves based on ferromagnet/semiconductor hybrid structures consisting of the Heusler alloy Co2FeSi on GaAs
    Ramsteiner, Manfred
    Manzke, Yori
    Bruski, Pawel
    Farshchi, Rouin
    Herfort, Jens
    SPINTRONICS VI, 2013, 8813
  • [44] Full-Heusler Co2FeSi alloy thin films with perpendicular magnetic anisotropy induced by MgO-interfaces
    1600, American Institute of Physics Inc. (115):
  • [45] Full-Heusler Co2FeSi alloy thin films with perpendicular magnetic anisotropy induced by MgO-interfaces
    Takamura, Yota
    Suzuki, Takahiro
    Fujino, Yorinobu
    Nakagawa, Shigeki
    JOURNAL OF APPLIED PHYSICS, 2014, 115 (17)
  • [46] Disorder-induced spin polarization in a restricted geometries
    Eisenberg, E
    Berkovits, R
    PHYSICAL REVIEW B, 1999, 60 (22) : 15261 - 15265
  • [47] Epitaxial Heusler alloy Co2FeSi films on Si(111) substrates grown by molecular beam epitaxy
    Zander, M.
    Herfort, J.
    Kumakura, K.
    Scoehnherr, H-P
    Trampert, A.
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2010, 43 (30)
  • [48] The effect of interfaces on magnetic activation volumes in single crystal Co2FeSi Heusler alloy thin films
    Sagar, J.
    Sukegawa, H.
    Lari, L.
    Lazarov, V. K.
    Mitani, S.
    O'Grady, K.
    Hirohata, A.
    APPLIED PHYSICS LETTERS, 2012, 101 (10)
  • [49] Microwave ferromagnetic properties of as-deposited Co2FeSi Heusler alloy films prepared by oblique sputtering
    曹晓琴
    李山东
    蔡志义
    杜洪磊
    薛倩
    高小洋
    谢施名
    Chinese Physics B, 2014, (08) : 75 - 78
  • [50] Enhanced giant magnetoresistance in Heusler alloy (Co2FeSi/Ag)N multilayers for read sensor applications
    Khamtawi, R.
    Chureemart, J.
    Chantrell, R. W.
    Chureemart, P.
    JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2025, 58 (08)
12345