Magnetic behaviour of Co-AlN thin films with various Co concentrations

Takanobu Sato, Yasushi Endo, Yu Shiratsuchi, Masahiko Yamamoto

研究成果: Article査読

5 被引用数 (Scopus)

抄録

We have investigated the magnetic behaviour of Co-AlN (Al1-xCoxN) thin films with various Co concentrations (x) of 0.06-0.25. For all Co concentrations, the hysteresis are not observed in any magnetization curves at the temperatures of 10-300 K. For the Co concentration x below 0.10, the magnetization is almost zero at the temperature above 50 K and increases slightly with decreasing temperature below 50 K. In contrasts, for the Co concentration x above 0.17, the peak temperature in zero-field-cooled magnetization can be observed and its value increases from around 5 to 10 K with increasing Co concentration. On the basis of these results, it is found that the room-temperature ferromagnetism is not observed at any Co concentrations. It is suggested that the magnetic behaviour at the temperature more than 10 K changes from paramagnetism or spin-glass state to superparamagnetism or spin-glass state with increasing Co concentration.

本文言語English
ページ(範囲)e735-e737
ジャーナルJournal of Magnetism and Magnetic Materials
310
2 SUPPL. PART 3
DOI
出版ステータスPublished - 2007 3
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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