Ferromagnetism in transition-metal-doped TiO2 thin films

Nguyen Hoa Hong, Joe Sakai, W. Prellier, Awatef Hassini, Antoine Ruyter, and François Gervais
Phys. Rev. B 70, 195204 – Published 10 November 2004

Abstract

V, Cr, Fe, Co, and Ni had been chosen to substitute partially for Ti in TiO2. By applying appropriate conditions, transition-metal-doped TiO2 thin films deposited on LaAlO3 substrates by laser ablation which show a good crystallinity and ferromagnetism above room temperature, could be obtained. The tendency of the dependence of magnetization versus element seems to be in accord with what theories have predicted. Among all the dopants, V appears to be the most promising candidate since its doping results in semiconducting films with a giant magnetic moment. Films are free of dopant particles or clusters. Structural and magnetic measurements have revealed that the room temperature ferromagnetism in VCrFeCoNi-doped thin films must originate from the transition-metal-doped TiO2 matrices.

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  • Received 5 March 2004

DOI:https://doi.org/10.1103/PhysRevB.70.195204

©2004 American Physical Society

Authors & Affiliations

Nguyen Hoa Hong*

  • Laboratoire LEMA, UMR 6157 CNRS-CEA, Université F. Rabelais, Parc de Grandmont, 37200 Tours, France

Joe Sakai

  • School of Materials Science, JAIST, Asahidai 1-1, Tatsunokuchi-machi, Ishikawa 923-1292, Japan

W. Prellier

  • Laboratoire CRISMAT, UMR 6508 CNRS, ENSICAEN, 6 Bd du Maréchal Juin, 14050 Caen, France

Awatef Hassini, Antoine Ruyter, and François Gervais

  • Laboratoire LEMA, UMR 6157 CNRS-CEA, Université F. Rabelais, Parc de Grandmont, 37200 Tours, France

  • *Electronic address: hoahong@delphi.phys.univ-tours.fr

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Issue

Vol. 70, Iss. 19 — 15 November 2004

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