Photoluminenscence property of ferromagnetic ZnMnO thin films

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• 作者：Hongliang Bai ; Shumin He ; Guolei Liu ; ^{liu-guolei@sdu.edu.cn} ; Qiang Cao ; Dapeng Zhu ; Yanxue Chen ; Shishen Yan ; Liangmo Mei
• 关键词：ZnMnO ; Photoluminescence spectrum ; Ferromagnetism
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 June, 2012
• 卷：407
• 期：12
• 页码：2126-2130
• 文件大小：1017 K

摘要

High quality Mn doped ZnO thin films were grown on c-plane Al₂O₃ by oxygen plasma assisted molecular beam epitaxy. Photoluminescence spectra were investigated on the ferromagnetic ZnMnO films. An additional emission located at 鈭?.32 eV was observed on these ferromagnetic films for both as-grown and oxygen-annealed samples. It is assigned to the recombination of neutral acceptor bound excitons. The ionization energy of the acceptor was estimated to be 53-80 meV. The observed ferromagnetism was explained to relate with acceptor-type defects.