Studies of the magnetic and reversal properties for thin CoCrTa films

H. Zeng, Z. S. Shan, Y. Liu, M. Azarisooreh, K. Honardoost, D. J. Sellmyer

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The effects of magnetic layer thickness on film structural and magnetic properties were studied systematically with emphasis on the thermal effects on thin recording media films. X-ray diffraction measurements reveal structural changes as thickness decreases, and the existence of a "Cr enriched phase" associated with the interface. The saturation magnetization Ms decreases with thickness and the thickness of the "dead layer" was found to be ∼ 23 Å. Systematic measurements of effective anisotropy, coercivity and saturation magnetization as functions of temperature have been carried out. Magnetic viscosity measurements reveal that thermal stability is affected not only by grain sizes but also by anisotropy reduction associated with nanostructure evolution, as the film thickness decreases.

Original languageEnglish (US)
Pages (from-to)283-291
Number of pages9
JournalJournal of Magnetism and Magnetic Materials
Volume251
Issue number3
DOIs
Publication statusPublished - Nov 1 2002

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Keywords

  • Anisotropy
  • Magnetization reversal
  • Thermal activation volume
  • Thermal effect
  • Thermal stability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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