Correlation between the Magnetoresistance Ratio and the Interface Structure, and Local Strain of Co/Cu Superlattices Investigated by 59Co NMR

Yoshiaki Saito, Koichiro Inomata, Atsushi Goto

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Co/Cu superlattices were prepared by changing the Ar acceleration voltage (VB) in ion beam sputtering. VB dependence on the nanostructure of the interface alloy regions has been deduced from the 59Co nuclear magnetic resonance (NMR) spin-echo spectrum, and the correlation between the magnetoresistance (MR) ratio and interface structure was investigated. The results have shown that there is a correlation between the interlayer interaction and the interface chemical structure. The Co average fractions in the interface alloy regions are nearly uniform and equal to 50 at.% for superlattices having small Ap, and distributed for superlattices having large A p. Moreover, the local strain from the shift in the hyperfine field has been found to be correlated with the Co uniaxial anisotropy constant due to the strain from the epitaxial growth on Cu.

Original languageEnglish
Pages (from-to)1450-1454
Number of pages5
Journaljournal of the physical society of japan
Volume62
Issue number5
DOIs
Publication statusPublished - 1993 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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