Effects of deposition temperature and in-situ annealing time on structure and magnetic properties of (001) orientation FePt films

Yongsheng Yu, T. A. George, Haibo Li, Daqian Sun, Zhenan Ren, D. J. Sellmyer

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

FePt films were prepared on (100) oriented single crystal MgO substrates at high temperature ranging from 620 until 800 °C and in-situ annealed for different times ranging from 0 to 60 min to obtain ordered FePt films. The structural analysis indicates that FePt films grow epitaxially on MgO (100) substrates. Both increasing deposition temperature and in-situ annealing time enhance the (001) texture and ordering of FePt films. The magnetic analysis shows that these L10 FePt films have perpendicular anisotropy and the easy magnetization c-axis is perpendicular to the film plane. Magnetization reversal is controlled by a rotational mechanism. The hard magnetic properties of the films are improved with increasing deposition temperature or in-situ annealing time.

Original languageEnglish (US)
Pages (from-to)7-10
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume328
DOIs
Publication statusPublished - Feb 1 2013

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Keywords

  • FePt
  • Hard magnetic
  • Magnetic recording
  • Texture

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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