Effective field analysis using the full angular spin-orbit torque magnetometry dependence

Abstract

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.

15 page, 3 figures

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Cited by in corpus (7)

• Field-free spin-orbit torque-induced switching of perpendicular magnetization in a ferrimagnetic layer with vertical composition gradient
• Electric-field control of spin-orbit torques in perpendicularly magnetized W/CoFeB/MgO films
• Large Spin Hall Effect in an Amorphous Binary Alloy
• Modification of Dzyaloshinskii-Moriya interaction stabilized domain wall chirality by driving currents
• Spin-orbit torque characterization in a nutshell
• Dimensional crossover in spin Hall oscillators
• Single device offset-free magnetic field sensing principle with tunable sensitivity and linear range based on spin-orbit-torques