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Orientation dependence of the intrinsic anomalous Hall effect in hcp Cobalt
Eric Roman1, Yuriy Mokrousov, Ivo Souza
1Department of Physics, University of California, Berkeley, California 94720, USA.
Abstract:
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.
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