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

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number184437
Pages (from-to)1-9
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume70
Issue number18
DOIs
Publication statusPublished - Nov 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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