Cr-doped TiO2 anatase:: A ferromagnetic insulator -: art. no. 046103

被引：66

作者：

Droubay, T ^{[1
]}

Heald, SM

Shutthanandan, V

Thevuthasan, S

Chambers, SA

Osterwalder, J

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 97卷 / 04期

关键词：

D O I：

10.1063/1.1846158

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Epitaxial ferromagnetic films of Cr-doped TiO2 anatase (CrxTi1-xO2-x/2) were grown on LaAlO3(001) using oxygen-plasma-assisted molecular-beam epitaxy. Cr K-shell x-ray absorption near-edge spectroscopy shows that the formal oxidation state of Cr is +3 throughout the films, with no evidence for either elemental Cr or half-metallic CrO2. Cr is found to substitute for Ti in the lattice, with uniform distribution throughout the doped region of the film. The Cr-doped anatase films exhibit room-temperature ferromagnetism aligned in-plane, with a saturation magnetization of similar to0.6 mu(B)/Cr atom. (C) 2005 American Institute of Physics.

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