Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface
arXiv:cond-mat/0610061 · doi:10.1103/PhysRevLett.98.046601
Abstract
Fully-relativistic first-principles calculations of the Fe(001) surface demonstrate that resonant surface (interface) states may produce sizeable tunneling anisotropic magnetoresistance in magnetic tunnel junctions with a single magnetic electrode. The effect is driven by the spin-orbit coupling. It shifts the resonant surface band via the Rashba effect when the magnetization direction changes. We find that spin-flip scattering at the interface is controlled not only by the strength of the spin-orbit coupling, but depends strongly on the intrinsic width of the resonant surface states.
5 pages, 3 figures
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