Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin–orbit coupling

doi:10.1088/1674-1056/20/5/057303

Abstract We present theoretical calculations of spin transport in spin filtering magnetic tunnelling junctions based on the Landauer–Büttiker formalism and taking into account the spin–orbit coupling (SOC). It is shown that spin-flip scattering induced by SOC is stronger in parallel alignment of magnetization of the ferromegnet barrier (FB) and the ferromagnetic electrode than that in antiparallel case. The increase of negative tunnelling magnetoresistance with bias is in agreement with recent experimental observation.

Keywords: tunnelling magnetoresistance spin filtering barrier magnetic tunnelling junctions spin–orbit coupling

Received: 28 April 2010
Revised: 27 December 2010
Accepted manuscript online:

PACS:	73.40.Gk	(Tunneling)
	73.40.-c	(Electronic transport in interface structures)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	72.15.Gd	(Galvanomagnetic and other magnetotransport effects)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10564004) and Korea Research Foundation (Grant No. KRF-2005-070-C00065).

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Li Yun(李云) Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin–orbit coupling 2011 Chin. Phys. B 20 057303

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[1]	Bulk-like contribution to tunnel magnetoresistance in magnetic tunnel junctions Zhu Tao (朱涛), Zhan Wen-Shan (詹文山), Shen Feng (沈峰), Zhang Ze (张泽), X. H. Xiang, G. Landry, John Q. Xiao. Chin. Phys. B, 2003, 12(6): 665-668.

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Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin–orbit coupling

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