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Electronic structure of Ni2MnIn for use in spin injection

J. Appl. Phys. 87, 7064 (2000); doi:10.1063/1.372932

Issue Date: 1 May 2000

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K. A. Kilian and R. H. Victora
Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455
Data and Das [S. Datta and B. Das, Appl. Phys. Lett. 56, 665 (1990)] proposed an electronic analog to the optoelectronic modulator which would employ spin injection from a ferromagnet into a semiconductor. We investigate the ferromagnet–semiconductor system consisting of the Heusler alloy Ni2MnIn and the semiconductor InAs. Using a full-potential electronic structure code with a basis set of Slater-type orbitals, we have calculated the band structure of Ni2MnIn. We calculate the spin polarization for each atom. It resides primarily on the Mn atom (3.51), with a small moment (0.31) on the Ni. Interestingly, In has a very small moment (–0.04), which is antiferromagnetically coupled to the other atoms. Using a simple model, we estimate the transmittance of minority spins in three high-symmetry directions. ©2000 American Institute of Physics.
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KEYWORDS and PACS

Keywords
PACS
  • 71.20.Be
    Electronic structure Electron density of states and band structure of crystalline solids Transition metals and alloys
  • 75.50.Cc
    Magnetic properties and materials Studies of specific magnetic materials Other ferromagnetic metals and alloys
  • 73.40.Ns
    Electronic structure and electrical properties of surfaces, interfaces, and thin films Electronic transport in interface structures Metal–nonmetal contacts
  • 71.15.Fv
    Electronic structure Methods of electronic structure calculations Atomic- and molecular-orbital methods (including tight binding approximation, valence-band method, etc.)
  • 75.30.Cr
    Magnetic properties and materials Intrinsic properties of magnetically ordered materials Saturation moments and magnetic susceptibilities
  • YEAR: 2000

PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (17)
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