Unidirectional anisotropy magnetoresistance and exchange coupling in 81NiFe/Cr multilayer

Huiyu Chen, Youquan Luo, Hong Zhu, Linqing Wen

Research output: Contribution to journalArticle

Abstract

There is unidirectional anisotropy in 81 NiFe/Cr multilayers prepared by electronic beam evaporation. The samples exhibit asymmetrical hysteresis loop, which is equivalent to the existence of an exchange bias of the order of 1 Oe. The results show that (1) two branches of the magnetoresistance loop measured with increasing and decreasing magnetic field respectively are different, especially in transverse field condition; (2) the difference in the maximum transverse magnetoresistance of some samples even reaches 0.78% and its (Rmax-Rmin)/R reaches 4.72%, which is much larger than the value 3% of 82 NiFe alloy of high quality. It was inferred that the magnetoresistance effect of these multilayers is caused by both the spin-orbit coupling mechanism and the mechanism of electron spin dependent scattering.

Original languageEnglish
Pages (from-to)1185-1191
Number of pages7
JournalWuli Xuebao/Acta Physica Sinica
Volume43
Issue number7
Publication statusPublished - 1 Jul 1994
Externally publishedYes

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