Microstructures and coercivities of SmCox and Sm(Co,Cu)5 films prepared by magnetron sputtering

J. Zhang, Y. K. Takahashi, R. Gopalan, K. Hono*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We have investigated the influence of composition and annealing conditions on the magnetic properties and microstructural features of SmCox films that were prepared by sputtering and subsequent annealing. A huge in-plane coercivity of 5.6 T was obtained from an optimally annealed Sm-Co film, which was attributed to the nanometer sized polycrystalline microstructure of the highly anisotropic SmCo5 phase. Although a high density of planar defects were observed in the films that were annealed at high temperatures, they did not act as strong pinning sites for domain wall motion. The effect of Cu on [SmCo4.5(9 nm)/Cu(xnm)]10 multilayer thin films was also studied. An appropriate Cu content increased the coercivity.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number1
DOIs
Publication statusPublished - 2007 Mar
Externally publishedYes

Keywords

  • Huge coercivity
  • Microstructure
  • Phase transition
  • Sm-Co film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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