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Proceedings Paper

Spin-transfer torque in ferromagnetic bilayers generated by anomalous Hall effect and anisotropic magnetoresistance
Author(s): Tomohiro Taniguchi; Julie Grollier; M. D. Stiles
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Paper Abstract

We propose an experimental scheme to determine the spin-transfer torque efficiency excited by the spin-orbit interaction in ferromagnetic bilayers from the measurement of the longitudinal magnetoresistace. Solving a diffusive spin-transport theory with appropriate boundary conditions gives an analytical formula of the longitudinal charge current density. The longitudinal charge current has a term that is proportional to the square of the spin-transfer torque efficiency and that also depends on the ratio of the film thickness to the spin diffusion length of the ferromagnet. Extracting this contribution from measurements of the longitudinal resistivity as a function of the thickness can give the spin-transfer torque efficiency.

Paper Details

Date Published: 4 November 2016
PDF: 7 pages
Proc. SPIE 9931, Spintronics IX, 99310W (4 November 2016); doi: 10.1117/12.2235822
Show Author Affiliations
Tomohiro Taniguchi, National Institute of Advanced Industrial Science and Technology (Japan)
Julie Grollier, Mixte de Physique CNRS/Thales (France)
Univ. Paris Sud 11 (France)
M. D. Stiles, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 9931:
Spintronics IX
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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