Bi-quadratic interlayer exchange coupling in Co 2MnSi/Ag/Co 2MnSi pseudo spin-valve

Hari S. Goripati, Masamitsu Hayashi, T. Furubayashi, T. Taniguchi, H. Sukegawa, Y. K. Takahashi, K. Hono

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5 Citations (Scopus)

Abstract

Bi-quadratic interlayer exchange coupling is found below 100 K in a Co 2MnSi/Ag/Co 2MnSi current-perpendicular-to-plane pseudo spin valves. The bi-quadratic coupling constant J 2 was estimated to be ∼-0.30 erg/cm 2 at 5 K and the strong temperature dependence of the coupling strength points its likely origin to the loose spin model. Application of current of ∼2 × 10 7 A/cm 2 below 100 K leads to an increase in the magnetoresistance (MR), indicating current induced antiparallel alignment of the two magnetic layers. These results strongly suggest that the presence of the bi-quadratic interlayer exchange coupling causes the reduction of the magnetoresistance at low temperature and illustrates the importance of understanding the influence of interlayer exchange coupling on magnetization configuration in magnetic nanostructures.

Original languageEnglish
Article number123914
JournalJournal of Applied Physics
Volume110
Issue number12
DOIs
Publication statusPublished - 2011 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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