Spin-transfer torque in ferromagnetic bilayers generated by anomalous Hall effect and anisotropic magnetoresistance

Tomohiro Taniguchi; Julie Grollier; M. D. Stiles

doi:10.1117/12.2235822

4 November 2016 Spin-transfer torque in ferromagnetic bilayers generated by anomalous Hall effect and anisotropic magnetoresistance

Tomohiro Taniguchi, Julie Grollier, M. D. Stiles

Author Affiliations +

Proceedings Volume 9931, Spintronics IX; 99310W (2016) https://doi.org/10.1117/12.2235822
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Tomohiro Taniguchi, Julie Grollier, and M. D. Stiles "Spin-transfer torque in ferromagnetic bilayers generated by anomalous Hall effect and anisotropic magnetoresistance", Proc. SPIE 9931, Spintronics IX, 99310W (4 November 2016); https://doi.org/10.1117/12.2235822

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