High bulk spin scattering asymmetry in cpp spin valves with alternated monatomic [Fe/Co]n superlattice

Tomonori Mano, In Chang Qiu, Kousaku Miyake, Masaaki Doi, Satoko Kuwano, Toshiyuki Shima, Masashi Sahashi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We confirmed the structural properties of trilayered epitaxial films with AML [Fe/Co]n and Au spacer on Au electrode by RHEED and TEM. A considerably large △RA (2.61 mΩμm2) resistance area product was observed in all metallic current perpendicular-to-plane giant magneto-resistance (CPP-GMR) spin-valve elements by using alternate monatomic epitaxial [Fe/Co]n ferromagnetic layer with IrMn layer on the top. The estimated spin scattering asymmetry coefficient β and interface asymmetry coefficient γ was 0.81 and 0.43 ± 0.05, respectively. This value of β is higher than that of Fe50Co50/Cu laminated with Cu spacer or Heusler alloy which is largest value ever reported at room temperature.

Original languageEnglish
Article number5257071
Pages (from-to)3460-3463
Number of pages4
JournalIEEE Transactions on Magnetics
Volume45
Issue number10
DOIs
Publication statusPublished - 2009 Oct 1

Keywords

  • Epitaxial superlattice
  • Giant magnetoresistance
  • Index Terms-Alternate monatomic layer
  • Spin scattering asymmetry
  • Spin-valves

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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    Mano, T., Qiu, I. C., Miyake, K., Doi, M., Kuwano, S., Shima, T., & Sahashi, M. (2009). High bulk spin scattering asymmetry in cpp spin valves with alternated monatomic [Fe/Co]n superlattice. IEEE Transactions on Magnetics, 45(10), 3460-3463. [5257071]. https://doi.org/10.1109/TMAG.2009.2022022