Effect of Cu precipitation from metastable crystalline BCC-Fe(Cu) films on magnetic properties

Xiaofang Bi, Shengkai Gong, Huibin Xu, K. Ishiyama, Ken ichi Arai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Fe-Cu films with various contents of Cu were prepared by using the RF sputtering method, followed by an annealing treatment in vacuum at different temperatures for 2 min. X-ray diffraction analysis was made to identify the structural change of the films after annealing. It was found that, when the Cu content was no more than 50 at%, the coercivity decreased after annealing at 523 K, owing to the reduction of internal stress induced during the sputtering process. The coercivity, however, increased after annealing at 773 K, caused by the precipitation of Cu from the metastable BCC-Fe(Cu) solid solution. Furthermore, the increase of Cu content in the BCC-Fe decreased the temperatures at which the coercivity began to increase. The effects of increased annealing temperatures caused a decrease in lattice parameter of BCC-Fe accompanied by a slight decrease in saturation magnetization Ms for all Cu concentrations.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume241
Issue number2-3
DOIs
Publication statusPublished - 2002 Mar 1

Keywords

  • Annealing
  • Magnetic properties
  • Precipitation
  • Thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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