Dual spin valves with nano-oxide layers

Hiromi Yuasa, Y. Kamiguchi, M. Sahashi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A novel method is proposed for increasing the giant magnetoresistance (GMR) of dual spin valves of the CoFe/Cu/CoFe/Cu/CoFe type by inserting nano-oxide layers (NOLs) into the pinned layers. Using this method, MR ratio of 23.5% was obtained, a value equal to those of specular spin valves with antiferromagnetic oxide, e.g., NiO. This method allows the selection of metallic materials for the antiferromagnetic layer. In addition, we obtained the specularity factor of upper NOLs, 0.8, and that of lower NOLs, 0.7, by calculating Boltzmann equations taking into account the roughness of each interlayer. This model shows that the MR ratio would be 27.5% for dual spin valves with ideal NOLs.

Original languageEnglish
Pages (from-to)53-59
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Issue number1
Publication statusPublished - Nov 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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