Metal-insulator transition and ferromagnetism phenomena in La 0.7Ce0.3MnO3 thin films: Formation of Ce-rich nanoclusters

Takeshi Yanagida, Teruo Kanki, Bertrand Vilquin, Hidekazu Tanaka, Tomoji Kawai

研究成果: ジャーナルへの寄稿学術誌査読

46 被引用数 (Scopus)

抄録

The nature of metal-insulator transition and ferromagnetism phenomena of perovskite La0.7Ce0.3MnO3 thin films was investigated. In particular, the effects of post-annealing under oxidization and reduction atmospheres on the electrical transport and magnetic properties were systematically examined. The metal-insulator transition temperature and the Curie temperature of ferromagnetism were found to be significantly influenced by the post-annealing and increase with increasing the post-annealing temperature under both oxygen and argon atmospheres. In addition, the major carriers within the conductive films were identified to be holes. Structural and composition analysis clarified that cation deficiencies due to nanoclustering cerium oxides within the post-annealed films are responsible for the emergence of the metal-insulator transition and ferromagnetism phenomena.

本文言語英語
論文番号184437
ページ(範囲)1-9
ページ数9
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
70
18
DOI
出版ステータス出版済み - 11月 2004
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 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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