Journal Article

PreJuSER-14668

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Role of Spin-Flip Transitions in the Anomalous Hall Effect of FePt Alloy

Zhang, H.FZJ* ; Freimuth, F.FZJ* ; Blügel, S.FZJ* ; and Mokrousov, Y.FZJ*

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7286  doi:10.1103/PhysRevLett.106.117202

Abstract: We carry out ab initio calculations which demonstrate the importance of the non-spin-conserving part of the spin-orbit interaction for the intrinsic anomalous Hall conductivity of ordered FePt alloys. The impact of this interaction is strongly reduced if Pt is replaced by the lighter isoelectronic element Pd. An analysis of the interband transitions responsible for the anomalous velocity reveals that spin-flip transitions occur not only at avoided band crossings near the Fermi level, but also between well-separated pairs of bands with similar dispersions. We also predict a strong anisotropy in the anomalous Hall conductivity of FePt caused entirely by low-frequency spin-flip transitions.

Keyword(s): J

Note: We acknowledge discussions with M. Lezaic, Ph. Mavropoulos, and K. M. Seemann. This work was supported by the HGF-YIG Programme VH-NG-513 and NSF Grant DMR-0706493. Computational time on JUROPA and JUGENE supercomputers was provided by Julich Supercomputing Centre.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)
2. Quanten-Theorie der Materialien (IAS-1)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)
4. Jülich-Aachen Research Alliance - Simulation Sciences (JARA-SIM)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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