1. Large enhancement of the spin Hall effect in Au by side-jump scattering on Ta impurities.
- Author
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Laczkowski, P., Fu, Y., Yang, H., Rojas-Sánchez, J.-C., Noel, P., Pham, V. T., Zahnd, G., Deranlot, C., Collin, S., Bouard, C., Warin, P., Maurel, V., Chshiev, M., Marty, A., Attané, J.-P., Fert, A., Jaffrès, H., Vila, L., and George, J.-M.
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GOLD compounds , *SPIN Hall effect , *TANTALUM metallurgy - Abstract
We present measurements of the spin Hall effect (SHE) in AuW and AuTa alloys for a large range of W or Ta concentrations by combining experiments on lateral spin valves and ferromagnetic-resonance/spin-pumping techniques. The main result is the identification of a large enhancement of the spin Hall angle (SHA) by the side-jump mechanism on Ta impurities, with a SHA as high as +0.5 (i.e., 50%) for about 10% of Ta. In contrast, the SHA in AuW does not exceed +0.15 and can be explained by intrinsic SHE of the alloy without significant extrinsic contribution from skew or side-jump scattering by W impurities. The AuTa alloys, as they combine a very large SHA with a moderate resistivity (smaller than 85μΩcm), are promising for spintronic devices exploiting the SHE. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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