Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-02-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Accepted for publication in Physical Review Letters
Scientific paper
We carry out first-principles 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.
Blügel Stefan
Freimuth Frank
Mokrousov Yuriy
Souza Ivo
Zhang Hongbin
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