Orientation Dependence of the Intrinsic Anomalous Hall Effect in hcp Cobalt

Details Orientation Dependence of the Intrinsic Anomalous Hall Effect in hcp Cobalt Orientation Dependence of the Intrinsic Anomalous Hall Effect in hcp Cobalt

2009-05-04

arxiv.org/abs/0905.0152v1

Phys. Rev. Lett. 103, 097203 (2009)

Physics

Condensed Matter

Materials Science

Supplementary material: http://smilodon.berkeley.edu/publications/roman09_suppl.pdf

Scientific paper

10.1103/PhysRevLett.103.097203

We carry out first-principles calculations of the dependence of the intrinsic anomalous Hall conductivity of hcp Co on the magnetization direction. The Hall conductivity decreases smoothly from 481 S/cm to 116 S/cm as the magnetization is tilted from the c-axis to the ab-plane. This factor-of-four reduction compares 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 anisotropy of the anomalous Hall conductivity is a consequence of spin-orbit induced changes in the electron states near the Fermi level as the magnetization is rotated.

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