Temperature-dependent optical studies of Ti1-xCoxO2

被引：17

作者：

Guha, S ^{[1
]}

Ghosh, K

Keeth, JG

Ogale, SB

Shinde, SR

Simpson, JR

Drew, HD

Venkatesan, T

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] SW Missouri State Univ, Dept Phys Astron & Mat Sci, Springfield, MO 65804 USA

[3] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

[4] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 16期

关键词：

D O I：

10.1063/1.1619212

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the results of Raman and photoluminescence studies on epitaxial anatase phase Ti1-xCoxO2 films for x=0-0.07, grown by pulsed-laser deposition. The low-doped system (x=0.01 and 0.02) shows a Curie temperature of 700 K in the as-grown state. The Raman spectra from the doped and undoped films confirm their anatase phase. The photoluminescence spectrum is characterized by a broad emission from self-trapped excitons (STE) at 2.3 eV at temperatures below 120 K. This peak is characteristic of the anatase-phase TiO2 and shows a small blueshift with increasing doping concentration. The Co-doped samples show two spin-flip emission lines at 2.77 and 2.94 eV. (C) 2003 American Institute of Physics.

引用

页码：3296 / 3298

页数：3

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