Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition

T. O. Seki, Y. K. Takahashi*, K. Hono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

Perpendicularly anisotropic L 10 -ordered FePt-SiO2 granular films with an average grain size of 15 nm and a relatively narrow size distribution were prepared by cosputtering Fe, Pt, and SiO2 on MgO (001) substrates at 700 °C. By reducing the substrate temperature to 500 °C, the average grain size was further refined to 6.2 nm with a standard deviation of 1.7 nm; however, the FePt particles remained as an A1 disordered phase. Alloying Ag to the FePt particles and increasing the Ar gas pressure in the sputtering chamber were found to be both beneficial for enhancing the L 10 ordering while keeping the fine granular structure.

Original languageEnglish
Article number023910
JournalJournal of Applied Physics
Volume103
Issue number2
DOIs
Publication statusPublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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