6533b82afe1ef96bd128c2b4
RESEARCH PRODUCT
Effective field analysis using the full angular spin-orbit torque magnetometry dependence
Benjamin KrügerGurucharan V. KarnadKyujoon LeeLaurent VilaRoberto Lo ConteDafiné RavelosonaMathias KläuiKarin GarciaT. SchulzBerthold Ockersubject
PhysicsCondensed matter physicsMagnetic domainCondensed Matter - Mesoscale and Nanoscale PhysicsMagnetometerDynamics (mechanics)FOS: Physical sciences02 engineering and technology021001 nanoscience & nanotechnology01 natural scienceslaw.inventionMagnetizationlawHarmonics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)QuasiparticleTorqueAstrophysics::Earth and Planetary Astrophysics[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physics0210 nano-technologyComputingMilieux_MISCELLANEOUSSpin-½description
Spin-orbit torques promise ultra-efficient magnetization switching used for advanced devices based on emergent quasi-particles such as domain walls and skyrmions. Recently, the spin structure dynamics, materials and systems with tailored spin-orbit torques are being developed. A method, which allows one to detect the acting torques in a given system as a function of the magnetization direction is the torque-magnetometry method based on a higher harmonics analysis of the anomalous Hall-effect. Here we show that the effective fields acting on magnetic domain walls that govern the efficiency of their dynamics require a sophisticated analysis taking into account the full angular dependence of the torques. Using a 1-D model we compared the spin orbit torque efficiencies by depinning measurements and spin torque magnetometry. We show that the effective fields can be accurately determined and we find good agreement. Thus our method allows us now to rapidly screen materials and predict the resulting quasi-particle dynamics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-01 | Physical Review B |