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

Spin-orbit torques promise ultraefficient magnetization switching used for advanced devices based on emergent quasiparticles 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...

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Bibliographic Details
Published in:Physical review. B 2017-06, Vol.95 (22), p.224409, Article 224409
Main Authors: Schulz, Tomek, Lee, Kyujoon, Krüger, Benjamin, Lo Conte, Roberto, Karnad, Gurucharan V., Garcia, Karin, Vila, Laurent, Ocker, Berthold, Ravelosona, Dafiné, Kläui, Mathias
Format: Article
Language:English
Subjects:
Dependence
Domain walls
Dynamic structural analysis
Hall effect
Higher harmonics
Hypothetical particles
Magnetic domains
Magnetic measurement
Magnetism
Magnetization
One dimensional models
Orbital mechanics
Particle theory
Spin dynamics
Spin structure
Torque
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Summary:Spin-orbit torques promise ultraefficient magnetization switching used for advanced devices based on emergent quasiparticles 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 one-dimensional 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 quasiparticle dynamics.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.95.224409