Origin on amorphization of Co-Mo magnetic thin films: Experiments and thermodynamic calculation

G. W. Qin, B. Yang, N. Xiao, Y. P. Ren, M. Jiang, X. Zhao, K. Oikawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Amorphisation of Co-Mo magnetic thin films has been studied by using X-ray diffraction technique, and thermodynamic calculation based on Miedema's semi-empirical model has been used to clarify the nature of amorphisation in this binary alloy system. The transition composition from the hexagonal cubic packed structure to the amorphous (H/A) is about 19 at.%Mo when the Co-Mo thin films are deposited at room temperature (RT) under a working Ar pressure of 0.2 Pa and a deposition rate of about 0.7 Å/s, but increases up to about 23 at.%Mo when deposited at 300 °C. The calculated transition composition at RT based on the Miedema's model or the thermodynamically assessed parameters is 18.7 at.%Mo or 16.1 at.%Mo, respectively, well consistent with the experimental value of ~ 19.0 at.%Mo. Higher deposition rate and lower pressure shift the H/A transition composition to a higher Mo content.

Original languageEnglish
Pages (from-to)2984-2987
Number of pages4
JournalThin Solid Films
Volume517
Issue number9
DOIs
Publication statusPublished - 2009 Mar 2

Keywords

  • Amorphisation
  • Co-Mo
  • Magnetic properties
  • Sputtering
  • Thin films
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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