Spin-orbit torques in ferrimagnetic GdFeCo alloys

Roschewsky, Niklas; Matsumura, Tomoya; Cheema, Suraj; Hellman, Frances; Kato, Takeshi; Iwata, Satoshi; Salahuddin, Sayeef

doi:10.1063/1.4962812

Title: Spin-orbit torques in ferrimagnetic GdFeCo alloys

Journal Article · Mon Sep 12 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4962812· OSTI ID:1456957

Roschewsky, Niklas ^[1]; Matsumura, Tomoya ^[2]; Cheema, Suraj ^[3]; Hellman, Frances ^[4]; Kato, Takeshi ^[2]; Iwata, Satoshi ^[5]; Salahuddin, Sayeef ^[6]

Univ. of California, Berkeley, CA (United States). Department of Physics
Nagoya University (Japan). Department of Electrical Engineering and Computer Science
Univ. of California, Berkeley, CA (United States). Department of Materials Science and Engineering
Univ. of California, Berkeley, CA (United States). Department of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
Nagoya University (Japan). Institute of Materials and Systems for Sustainability
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; Univ. of California, Berkeley, CA (United States). Department of Electrical Engineering and Computer Sciences

In this work, the spin-orbit torque switching of ferrimagnetic Gd_x(Fe₉₀Co₁₀)_100-xfilms was studied for both transition metal (TM)-rich and rare earth (RE)-rich configurations. The spin-orbit torque driven magnetization switching follows the same sense in TM-rich and RE-rich samples with respect to the total magnetization, but the sense of the switching is reversed with respect to the TM magnetization. This indicates that the sign of the spin-orbit-torque-driven magnetic switching follows the total magnetization, although transport based techniques such as anomalous Hall effect are only sensitive to the transition metal magnetization. Finally, these results provide important insight into the physics of spin angular momentum transfer in materials with antiferromagnetically coupled sublattices.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: SC-22.2 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE

Grant/Contract Number:: AC02-05CH11231; AC02-05-CH11231

OSTI ID:: 1456957

Alternate ID(s):: OSTI ID: 1325302

Journal Information:: Applied Physics Letters, Vol. 109, Issue 11; Related Information: © 2016 Author(s).; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 72 works

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