Phys. Rev. Lett. 103, 097203 (2009) [4 pages]Orientation Dependence of the Intrinsic Anomalous Hall Effect in hcp CobaltReceived 1 May 2009; published 27 August 2009 We carry out first-principles calculations of the dependence of the intrinsic anomalous Hall conductivity of hcp Co on the spin magnetization direction. The Hall conductivity drops from 481 to 116 S/cm as the magnetization is tilted from the easy axis (c axis) to the ab plane. These values agree reasonably well with measurements on single crystals, while the angular average of 226 S/cm is in excellent agreement with the value of 205 S/cm measured in polycrystalline films. The strong intrinsic anisotropy is shown to arise from quasidegeneracies near the Fermi level. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.097203
DOI:
10.1103/PhysRevLett.103.097203
PACS:
75.30.Gw, 72.15.Gd, 78.20.Ls
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