Giant magnetoresistance with low saturation fields in Co-Fe/Cu and Ni80Fe20/Cu multilayers induced by optimized Ar acceleration voltage in ion beam sputtering

K. Inomata, Y. Saito, S. Hashimoto

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Magnetic properties and magnetoresistance were investigated for Co1-xFex/Cu and Ni80Fe20/Cu multilayers with different Co1-xFex, Ni80Fe20 and Cu thicknesses which were prepared on a MgO(110) substrate using ion beam sputtering with different Ar ion acceleration voltages (VB). The MR ratio for highly Co composed Co-Fe/Cu multilayers was substantiated to be significantly larger than that for Co/Cu multilayers. The GMR strongly depended on VB, suggesting the importance of interface randomness, which was investigated by 59Co NMR measurements for Co/Cu multilayers. The uniaxial anisotropy was induced in the multilayers by epitaxial growth on a MgO(110) substrate. The uniaxial anisotropy leads to a low saturation field and quite a small field change needed for GMR which is indispensable for magnetic sensors such as MR heads.

Original languageEnglish
Pages (from-to)350-356
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume121
Issue number1-3
DOIs
Publication statusPublished - 1993 Mar 2
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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