Spin torque due to non-uniform Rashba spin orbit effect

Ji Chen; Mansoor Bin Abdul Jalil; Seng Ghee Tan

doi:10.1063/1.4766438

journal article·2012-12-01Open access

Spin torque due to non-uniform Rashba spin orbit effect

Ji Chen, Mansoor Bin Abdul Jalil, Seng Ghee Tan

AIP Advances· Volume 2· Issue 4

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Source abstract

Abstract

Following the early theoretical descriptions of the spin-orbit-induced spin torque [S. G. Tan et al., arXiv:0705.3502 (2007); S. G. Tan et al., Ann. Phys. 326, 207 (2011)]10.1016/j.aop.2010.11.014, the first experimental observation of such effect was reported by L. M. Miron et al., Nature Mater 9, 230 (2010). We present in this article three additional spin torque terms that arise from the non-uniformity in magnetization space of the Rashba spin-orbit effect. We propose a simple Rashba gradient device consisting of a heterogeneous trilayer structure, which could potentially lower switching current by n orders of magnitude, where n = −log10(|ΔM|/|M|) is a measure of the magnetization change across the device.

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Research context

OpenAlex topics: Magnetic properties of thin films · Quantum and electron transport phenomena · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National University of Singapore 1 Computational Nanoelectronics and Nano-device Laboratory, Electrical and Computer Engineering Department, , 4 Engineering Drive 3, Singapore 117576, Singapore

National University of Singapore 2 Information Storage Materials Laboratory, Electrical and Computer Engineering Department, , 4 Engineering Drive 3, Singapore 117576, Singapore

A*STAR (Agency for Science, Technology and Research) 3 Data Storage Institute, , DSI Building, 5 Engineering Drive 1, Singapore 11760, Singapore

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