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@ARTICLE{Freimuth:172721,
author = {Freimuth, Frank and Blügel, Stefan and Mokrousov, Yuriy},
title = {{S}pin-orbit torques in {C}o/{P}t(111) and {M}n/{W}(001)
magnetic bilayers from first principles},
journal = {Physical review / B},
volume = {90},
number = {17},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2014-06165},
pages = {174423},
year = {2014},
abstract = {An applied electric current through a space-inversion
asymmetric magnet induces spin-orbit torques (SOTs) on the
magnetic moments, which holds much promise for future memory
devices. We discuss general Green's function expressions
suitable to compute the linear-response SOT in disordered
ferromagnets. The SOT can be decomposed into an even and an
odd component with respect to magnetization reversal, where
in the limit of vanishing disorder the even SOT is given by
the constant Berry curvature of the occupied states, while
the odd part exhibits a divergence with respect to disorder
strength. Within this formalism, we perform first-principles
density-functional theory calculations of the SOT in
Co/Pt(111) and Mn/W(001) magnetic bilayers. We find the even
and odd torque components to be of comparable magnitude.
Moreover, the odd torque depends strongly on an additional
capping layer, while the even torque is less sensitive. We
show that the even torque is nearly entirely mediated by
spin currents in contrast to the odd torque, which can
contain an important contribution not due to spin transfer.
Our results are in agreement with experiments, showing that
our linear-response theory is well-suited for the
description of SOTs in complex ferromagnets.},
cin = {IAS-1 / PGI-1 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {422 - Spin-based and quantum information (POF2-422)},
pid = {G:(DE-HGF)POF2-422},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000345244400002},
doi = {10.1103/PhysRevB.90.174423},
url = {https://juser.fz-juelich.de/record/172721},
}