GMR in magnetic multilayers from a first principles band structure kubo-greenwood approach

Fangyi Rao; A. J. Freeman

doi:10.1109/20.706316

GMR in magnetic multilayers from a first principles band structure kubo-greenwood approach

Fangyi Rao, A. J. Freeman

Northwestern University

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We employ the Kubo-Greenwood formula to investigate from first-principles the giant magnetoresistance in Fe_mM_n (M=V, Or, Mn and Cu) superlattices. The results indicate that MR can arise from band structure changes from ferromagnetic to anti-ferromagnetic alignments. Quantum confinement in the perpendicular direction is induced by the potential steps between the Fe and spacer layers and causes a much larger MR in the current-perpendicular-to-the-plane (CPP) geometry than in the current-in-plane (CIP) geometry. In the presence of the spin-orbit coupling interaction, MR is found to be reduced by spin-channel mixing.

Original language	English
Pages (from-to)	930-932
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	34
Issue number	4 PART 1
DOIs	https://doi.org/10.1109/20.706316
Publication status	Published - 1998

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "GMR in magnetic multilayers from a first principles band structure kubo-greenwood approach",

abstract = "We employ the Kubo-Greenwood formula to investigate from first-principles the giant magnetoresistance in FemMn (M=V, Or, Mn and Cu) superlattices. The results indicate that MR can arise from band structure changes from ferromagnetic to anti-ferromagnetic alignments. Quantum confinement in the perpendicular direction is induced by the potential steps between the Fe and spacer layers and causes a much larger MR in the current-perpendicular-to-the-plane (CPP) geometry than in the current-in-plane (CIP) geometry. In the presence of the spin-orbit coupling interaction, MR is found to be reduced by spin-channel mixing.",

author = "Fangyi Rao and Freeman, {A. J.}",

note = "Funding Information: Fangyi Rao, Tel: (510)-739-4266, Fax: (510)-739-4242, Email: fraoOavanticorp.com. This work was supported by the U.S. Department of Energy (Grant No. DE-FG02-88ER45372) and by a grant of computing time on the NERSC supercomputers. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "1998",

doi = "10.1109/20.706316",

language = "English",

volume = "34",

pages = "930--932",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - GMR in magnetic multilayers from a first principles band structure kubo-greenwood approach

AU - Rao, Fangyi

AU - Freeman, A. J.

N1 - Funding Information: Fangyi Rao, Tel: (510)-739-4266, Fax: (510)-739-4242, Email: fraoOavanticorp.com. This work was supported by the U.S. Department of Energy (Grant No. DE-FG02-88ER45372) and by a grant of computing time on the NERSC supercomputers. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 1998

Y1 - 1998

N2 - We employ the Kubo-Greenwood formula to investigate from first-principles the giant magnetoresistance in FemMn (M=V, Or, Mn and Cu) superlattices. The results indicate that MR can arise from band structure changes from ferromagnetic to anti-ferromagnetic alignments. Quantum confinement in the perpendicular direction is induced by the potential steps between the Fe and spacer layers and causes a much larger MR in the current-perpendicular-to-the-plane (CPP) geometry than in the current-in-plane (CIP) geometry. In the presence of the spin-orbit coupling interaction, MR is found to be reduced by spin-channel mixing.

AB - We employ the Kubo-Greenwood formula to investigate from first-principles the giant magnetoresistance in FemMn (M=V, Or, Mn and Cu) superlattices. The results indicate that MR can arise from band structure changes from ferromagnetic to anti-ferromagnetic alignments. Quantum confinement in the perpendicular direction is induced by the potential steps between the Fe and spacer layers and causes a much larger MR in the current-perpendicular-to-the-plane (CPP) geometry than in the current-in-plane (CIP) geometry. In the presence of the spin-orbit coupling interaction, MR is found to be reduced by spin-channel mixing.

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