1. Spin Hall Magnetoresistance and Spin–Orbit Torque Efficiency in Pt/FeCoB Bilayers.
- Author
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Magni, Alessandro, Basso, Vittorio, Sola, Alessandro, Soares, Gabriel, Meggiato, Nicola, Kuepferling, Michaela, Skowronski, Witold, Lazarski, Stanislaw, Grochot, Krzysztof, Khanjani, Mehran Vafaee, Langer, Juergen, and Ocker, Berthold
- Subjects
SPIN Hall effect ,MAGNETORESISTANCE ,TORQUE ,REMANENCE ,PERPENDICULAR magnetic anisotropy ,HALL effect ,MAGNETOCALORIC effects ,MAGNETIC anisotropy - Abstract
The spin Hall magnetoresistance (SMR) of Pt/FeCoB bilayers with in-plane magnetocrystalline anisotropy was analyzed with respect to a second-order effect in the sensing current, which acts, through the spin Hall effect in Pt, as a torque on the magnetization of the ferromagnetic (FM) layer and changes slightly its configuration. This leads to a small current-dependent shift of the SMR curves in field that allows, in structures with a multidomain state (e.g., Hall bars), the determination of the sign of the magnetic remanence. The SMR measurements were performed as a function of the Pt thickness and the spin Hall angle, and the diffusion length and the field-like and damping-like spin–orbit-torque (SOT) efficiency were determined. The results were compared with the values obtained from harmonic Hall voltage and SOT-FM resonance (FMR) measurements and show a good agreement. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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