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

Fingerprint

Metal insulator transition
Nanoclusters
Ferromagnetism
nanoclusters
ferromagnetism
insulators
Annealing
Thin films
annealing
thin films
metals
atmospheres
cerium oxides
Conductive films
Argon
Cerium
Curie temperature
structural analysis
Perovskite
Transport properties

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Metal-insulator transition and ferromagnetism phenomena in La 0.7Ce0.3MnO3 thin films : Formation of Ce-rich nanoclusters. / Yanagida, Takeshi; Kanki, Teruo; Vilquin, Bertrand; Tanaka, Hidekazu; Kawai, Tomoji.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 18, 184437, 01.11.2004, p. 1-9.

Research output: Contribution to journalArticle

@article{8d90cf04cdb84ff8b6babf64df962375,
title = "Metal-insulator transition and ferromagnetism phenomena in La 0.7Ce0.3MnO3 thin films: Formation of Ce-rich nanoclusters",
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.",
author = "Takeshi Yanagida and Teruo Kanki and Bertrand Vilquin and Hidekazu Tanaka and Tomoji Kawai",
year = "2004",
month = "11",
day = "1",
doi = "10.1103/PhysRevB.70.184437",
language = "English",
volume = "70",
pages = "1--9",
journal = "Physical Review B - Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "American Physical Society",
number = "18",

}

TY - JOUR

T1 - Metal-insulator transition and ferromagnetism phenomena in La 0.7Ce0.3MnO3 thin films

T2 - Formation of Ce-rich nanoclusters

AU - Yanagida, Takeshi

AU - Kanki, Teruo

AU - Vilquin, Bertrand

AU - Tanaka, Hidekazu

AU - Kawai, Tomoji

PY - 2004/11/1

Y1 - 2004/11/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=12144249511&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=12144249511&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.70.184437

DO - 10.1103/PhysRevB.70.184437

M3 - Article

VL - 70

SP - 1

EP - 9

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

SN - 1098-0121

IS - 18

M1 - 184437

ER -