This title appears in the Scientific Report : 2011 

Role of Spin-Flip Transitions in the Anomalous Hall Effect of FePt Alloy
Zhang, H.
Freimuth, F. / Blügel, S. / and Mokrousov, Y.
Quanten-Theorie der Materialien; PGI-1
Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM
Quanten-Theorie der Materialien; IAS-1
Physical review letters, 106 (2011) S. 117202
College Park, Md. APS 2011
Journal Article
Grundlagen für zukünftige Informationstechnologien
Physical Review Letters 106
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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.