Spin-dependent Band Structure, Fermi Surface, and Carrier Lifetime of Permalloy

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dc.contributor.author Mankey, Gary
dc.date.accessioned 2019-07-23T18:23:40Z
dc.date.available 2019-07-23T18:23:40Z
dc.date.copyright 1998
dc.date.issued 1998-12-02
dc.identifier.citation Petrovykh, D., et al. (1998): Spin-dependent Band Structure, Fermi Surface, and Carrier Lifetime of Permalloy. Applied Physics Letters, 73(23). DOI: https://doi.org/10.1063/1.122796 en_US
dc.identifier.issn 0003-6951
dc.identifier.uri http://ir.ua.edu/handle/123456789/6026
dc.description.abstract Angle-resolved photoemission is used to determine the energy bands of permalloy (Ni_0.8Fe_0.2) and compare them to Ni, Co, and Cu. The energy and momentum resolution (≈0.01 eV and ≈0.01 Å^-1) is high enough to resolve the magnetically split bands at the Fermi level that are responsible for spin-dependent conductivity and tunneling. For the Ʃ_1 band we find the magnetic exchange splittings δE _ex=0.27 eV (0.23 eV for Ni), δk_ex=0.16±0.02 Å^-1 (0.12±0.01 Å^-1 for Ni), the Fermi velocity v_F_↑=(0.22±0.02) 10^6 m/s (0.28x10^6 m/s for Ni, 0.33x10^6 m/s for fcc Co), and the widths δk_↑≤0.11 Å^-1. Compared to Ni, permalloy features a 27% larger magnetic splitting of the Fermi surface and an extremely short mean free path of 4-8 Å for minority spins. en_US
dc.format.mimetype applications/pdf en_US
dc.language English en_US
dc.publisher American Institute of Physics en_US
dc.subject Fermi-Dirac statistics en_US
dc.subject Alloys en_US
dc.subject Electronic bandstructure en_US
dc.subject Energy levels en_US
dc.title Spin-dependent Band Structure, Fermi Surface, and Carrier Lifetime of Permalloy en_US
dc.type text en_US
dc.rights.holder American Institute of Physics en_US


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