Effects of Various Sub-Monolayers on the Properties of Spin Valves with a Co90Fe10 Free Layer

Jongill Hong, Hitoshi Kanai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A sub-monolayer of Co90Fe10, Ni80Fe 20, Ta, Cu or Ru was investigated for a spin valve having a Co 90Fe10 free layer. The sub-monolayers of Co 90Fe10, Ni80Fe20, Cu and Ta did not significantly improve the giant magnetoresistance of the spin valve, probably because the spin-dependent scattering due to localized potentials at the Fe impurity in a Co free layer, rather than scattering at the other impurities, dominates the spin valve's magnetoresistance response. As a result of this dominance, the effect of such a sub-monolayer cannot be pronounced, However, since there was some improvement in all but one case, the results clearly confirm that such a layer can play a role as a spin-dependent scatterer. In the case of Ru, the sub-monolayer greatly decreased the giant magnetoresistance value, and this is direct evidence that Ru is indeed a suppressor of bulk spin-dependent scattering.

Original languageEnglish
Pages (from-to)7296-7298
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume42
Issue number12
Publication statusPublished - 2003 Dec 1

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Monolayers
Giant magnetoresistance
Scattering
Impurities
scattering
Magnetoresistance
suppressors
impurities

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "A sub-monolayer of Co90Fe10, Ni80Fe 20, Ta, Cu or Ru was investigated for a spin valve having a Co 90Fe10 free layer. The sub-monolayers of Co 90Fe10, Ni80Fe20, Cu and Ta did not significantly improve the giant magnetoresistance of the spin valve, probably because the spin-dependent scattering due to localized potentials at the Fe impurity in a Co free layer, rather than scattering at the other impurities, dominates the spin valve's magnetoresistance response. As a result of this dominance, the effect of such a sub-monolayer cannot be pronounced, However, since there was some improvement in all but one case, the results clearly confirm that such a layer can play a role as a spin-dependent scatterer. In the case of Ru, the sub-monolayer greatly decreased the giant magnetoresistance value, and this is direct evidence that Ru is indeed a suppressor of bulk spin-dependent scattering.",
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N2 - A sub-monolayer of Co90Fe10, Ni80Fe 20, Ta, Cu or Ru was investigated for a spin valve having a Co 90Fe10 free layer. The sub-monolayers of Co 90Fe10, Ni80Fe20, Cu and Ta did not significantly improve the giant magnetoresistance of the spin valve, probably because the spin-dependent scattering due to localized potentials at the Fe impurity in a Co free layer, rather than scattering at the other impurities, dominates the spin valve's magnetoresistance response. As a result of this dominance, the effect of such a sub-monolayer cannot be pronounced, However, since there was some improvement in all but one case, the results clearly confirm that such a layer can play a role as a spin-dependent scatterer. In the case of Ru, the sub-monolayer greatly decreased the giant magnetoresistance value, and this is direct evidence that Ru is indeed a suppressor of bulk spin-dependent scattering.

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