000838236 001__ 838236
000838236 005__ 20210129231521.0
000838236 037__ $$aFZJ-2017-06892
000838236 1001_ $$0P:(DE-Juel1)130643$$aFreimuth, Frank$$b0$$eCorresponding author$$ufzj
000838236 1112_ $$aAb initio Spin-orbitronics$$cMontesilvano$$d2017-09-25 - 2017-09-29$$wItaly
000838236 245__ $$aSpin-orbit torques in noncollinear magnets from first-principles density-functional theory
000838236 260__ $$c2017
000838236 3367_ $$033$$2EndNote$$aConference Paper
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000838236 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1507622798_20020$$xInvited
000838236 520__ $$aWhile spin-orbit torques [1] in magnetic bilayers composed of a 5d transition metal layer and a ferromagnetic layer can serve as a competitive alternative to the Slonczewski spin-transfer torque in spin-valves and magnetic tunnel junctions in order to realize MRAM devices, spin-orbit torques have even more potential, and are a potential game-changer, in antiferromagnetic spintronics [2] and in noncollinear magnets. In this talk we will focus on current-induced torques and spin-orbit driven effects in noncollinear magnetic bilayers. The combination of structural inversion asymmetry present in the bilayer geometry with noncollinear magnetism leads to several additional spin-orbit driven effects, such as the Dzyaloshinskii-Moriya interaction [3,4,5,6] and chiral damping [7], which join the other effects and current-induced torques important in noncollinear magnets and magnetic bilayers, such as spin-transfer torque, spin-orbit torque and nonadiabatic torque. In particular the combined action of the Dzyaloshinskii-Moriya interaction and the spin-orbit torque from the spin Hall effect enables current-driven domain-wall motion at ultrahigh speeds [8,9]. The large number of current-induced torques and spin-orbit driven effects participating in the current-induced motion of domain-walls or skyrmions are difficult to disentangle and to quantify in experimental measurements. First-principles density functional theory is an ideal tool to understand and to quantify these effects. For this purpose we extend our computational formalism of spin-orbit torques [10,11] to noncollinear magnets. An important problem in the formalism development concerns the correct inclusion of vertex corrections, without which several components of the current-induced torques in noncollinear chiral magnets would violate conservation laws. We will discuss the current-induced torques and spin-orbit driven effects that arise from the combination of structural inversion asymmetry, spin-orbit coupling, and noncollinear magnetism in Co/Pt and Mn/W bilayer systems. [1] K. Garello et al., Nature Nanotechnology 8, 587 (2013) [2] P. Wadley et al., Science 351, 587 (2016)[3] F. Freimuth et al., JPCM 26, 104202 (2014)[4] F. Freimuth et al., PRB 88, 214409 (2013)[5] F. Freimuth et al., JPCM 28, 316001 (2016)[6] F. Freimuth et al., ArXiv e-prints (2016), 1610.06541 [7] E. Jue et al., Nature Materials 15, 272 (2016)[8] L. Thomas et al., Nature Nanotechnology 8, 527 (2013)[9] S. Emori et al., Nature Materials 12, 611 (2013)[10] F. Freimuth et al., PRB 92, 064415 (2015)[11] F. Freimuth et al., PRB 90, 174423 (2014)
000838236 536__ $$0G:(DE-HGF)POF3-142$$a142 - Controlling Spin-Based Phenomena (POF3-142)$$cPOF3-142$$fPOF III$$x0
000838236 909CO $$ooai:juser.fz-juelich.de:838236$$pVDB
000838236 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130643$$aForschungszentrum Jülich$$b0$$kFZJ
000838236 9131_ $$0G:(DE-HGF)POF3-142$$1G:(DE-HGF)POF3-140$$2G:(DE-HGF)POF3-100$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lFuture Information Technology - Fundamentals, Novel Concepts and Energy Efficiency (FIT)$$vControlling Spin-Based Phenomena$$x0
000838236 9141_ $$y2017
000838236 9201_ $$0I:(DE-Juel1)IAS-1-20090406$$kIAS-1$$lQuanten-Theorie der Materialien$$x0
000838236 9201_ $$0I:(DE-Juel1)PGI-1-20110106$$kPGI-1$$lQuanten-Theorie der Materialien$$x1
000838236 9201_ $$0I:(DE-82)080009_20140620$$kJARA-FIT$$lJARA-FIT$$x2
000838236 9201_ $$0I:(DE-82)080012_20140620$$kJARA-HPC$$lJARA - HPC$$x3
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000838236 980__ $$aI:(DE-Juel1)PGI-1-20110106
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