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

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

中国物理B ›› 2011, Vol. 20 ›› Issue (5): 57303-057303.doi: 10.1088/1674-1056/20/5/057303

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

李云

Department of Materials Science and Engineering, Yunnan University, Kunming 650091, China; Department of Chemistry, Seoul National University, Seoul 151-747, Republic of Korea Department of Chemistry, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea

收稿日期:2010-04-28 修回日期:2010-12-27 出版日期:2011-05-15 发布日期:2011-05-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10564004) and Korea Research Foundation (Grant No. KRF-2005-070-C00065).

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

Li Yun(李云)^†

Department of Materials Science and Engineering, Yunnan University, Kunming 650091, China; Department of Chemistry, Seoul National University, Seoul 151-747, Republic of Korea Department of Chemistry, KAIST, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea

Received:2010-04-28 Revised:2010-12-27 Online:2011-05-15 Published:2011-05-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10564004) and Korea Research Foundation (Grant No. KRF-2005-070-C00065).

摘要/Abstract

摘要： 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.

关键词: tunnelling magnetoresistance, spin filtering barrier, magnetic tunnelling junctions, spin–orbit coupling

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.

Key words: tunnelling magnetoresistance, spin filtering barrier, magnetic tunnelling junctions, spin–orbit coupling

中图分类号: (Tunneling)

73.40.Gk

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)

李云. Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin–orbit coupling[J]. 中国物理B, 2011, 20(5): 57303-057303.

Li Yun(李云). Negative tunnelling magnetoresistance in spin filtering magnetic junctions with spin–orbit coupling[J]. Chin. Phys. B, 2011, 20(5): 57303-057303.

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

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

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