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Quantification of the spin-Hall anti-damping torque with a resonance spectrometer
- Source :
- Appl. Phys. Lett. 106, 022406 (2015)
- Publication Year :
- 2014
-
Abstract
- We present a simple technique using a cavity-based resonance spectrometer to quantify the anti-damping torque due to the spin Hall effect. Modification of ferromagnetic resonance is observed as a function of small DC current in sub-mm-wide strips of bilayers, consisting of magnetically soft FeGaB and strong spin-Hall metal Ta. From the detected current-induced linewidth change, we obtain an effective spin Hall angle of 0.08-0.09 independent of the magnetic layer thickness. Our results demonstrate that a sensitive resonance spectrometer can be a general tool to investigate spin Hall effects in various material systems, even those with vanishingly low conductivity and magnetoresistance.
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 106, 022406 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1411.6166
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.4906062