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 Citations (Scopus)

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
StatePublished - Nov 1 2002

Fingerprint

Saturation magnetization
Anisotropy
Magnetic after effect
magnetic properties
Thin films
Viscosity measurement
Magnetic variables measurement
thin films
Coercive force
Thermal effects
Film thickness
Structural properties
Nanostructures
Magnetic properties
Thermodynamic stability
saturation
X ray diffraction
magnetization
anisotropy
coercivity

Keywords

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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Studies of the magnetic and reversal properties for thin CoCrTa films. / Zeng, H.; Shan, Z. S.; Liu, Y.; Azarisooreh, M.; Honardoost, K.; Sellmyer, D. J.

In: Journal of Magnetism and Magnetic Materials, Vol. 251, No. 3, 01.11.2002, p. 283-291.

Research output: Contribution to journalArticle

Zeng, H. ; Shan, Z. S. ; Liu, Y. ; Azarisooreh, M. ; Honardoost, K. ; Sellmyer, D. J. / Studies of the magnetic and reversal properties for thin CoCrTa films. In: Journal of Magnetism and Magnetic Materials. 2002 ; Vol. 251, No. 3. pp. 283-291.
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