Exchange coupling and NOL magnetism consideration in Co1- xFex specular spin-valves

M. Doi, M. Izumi, Y. Abe, H. Fukuzawa, H. N. Fuke, H. Iwasaki, M. Sahashi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co1- xFex-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co1-xFe x(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co0.50Fe0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV).

Original languageEnglish
Pages (from-to)381-386
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume287
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2005 Feb 1

Keywords

  • Exchange coupling
  • Nano-oxide layer
  • Specular spin valve

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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