Structural, optical and magnetic properties of Co-doped ZnO films

被引：102
作者：
Liu, Xue-Chao
Shi, Er-Wei
Chen, Zhi-Zhan [1 ]
Zhang, Hua-Wei
Song, Li-Xin
Wang, Huan
Yao, Shu-De
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
[3] Peking Univ, Sch Phys, Dept Tech Phys, Beijing 100871, Peoples R China
来源：
JOURNAL OF CRYSTAL GROWTH | 2006年 / 296卷 / 02期
关键词：
optical properties; X-ray absorption spectroscopy; Co-doped ZnO; diluted magnetic semiconductors;
D O I：
10.1016/j.jcrysgro.2006.08.034
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Zn1-xCoxO (x = 0.05, 0.1, 0.15) films were deposited on Si (100) and quartz glass substrates using inductively coupled plasma enhanced physical vapor deposition system with magnetic confinement. Structural and chemical composition characterizations by X-ray absorption spectroscopy and Rutherford backscattering spectroscopy indicate that Co2+ substitute for Zn2+ in the tetrahedral configuration and form homogeneous films with wurtzite structure when x <= 0.15. UV-vis transmittance spectra are used to characterize the optical properties. It is found that both transmittance and band gap of Zn1-xCoxO films decrease with increasing Co content, owing to the enhancement of sp-d exchange interactions and typical d-d transitions. Magnetic measurements show that all the as-grown films exhibit intrinsic ferromagnetism above room temperature. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：135 / 140
页数：6
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