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Reflection mechanism for generating spin transfer torque without charge current

Autes, G.; Mathon, J. and Umerski, A. (2012). Reflection mechanism for generating spin transfer torque without charge current. Journal of Applied Physics, 111(5) article 053909.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1063/1.3689745
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Abstract

A reflection mechanism for generating spin-transfer torque is proposed. It is due to interference of bias-driven nonequilibrium electrons incident on a switching junction, with the electrons reflected from an insulating barrier inserted in the junction after the switching magnet. It is shown, using the rigorous Keldysh formalism, that this out-of-plane torque T is proportional to an applied bias and is as large as the torque in a conventional junction generated by a strong charge current. However, the charge current and the in-plane torque T are almost completely suppressed by the insulating barrier. This junction thus offers the highly applicable possibility of bias-induced switching of magnetization without charge current.

Item Type: Journal Article
Copyright Holders: 2012 American Institute of Physics
ISSN: 1089-7550
Extra Information: This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
Item ID: 33152
Depositing User: Andrey Umerski
Date Deposited: 07 Mar 2012 13:18
Last Modified: 26 Apr 2013 04:47
URI: http://oro.open.ac.uk/id/eprint/33152
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