Light Control of Ferromagnetism in ZnO Films on Pt Substrate at Room Temperature

被引：0
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作者：
Jihao Xie
Hongwei Qin
Yanming Hao
Bin Cheng
Weikang Liu
Liang Liu
Shaoqing Ren
Guangjun Zhou
Ziwu Ji
Jifan Hu
机构：
[1] School of Physics,Department of Physics
[2] State Key Laboratory for Crystal Materials,undefined
[3] Shandong University,undefined
[4] College of Sciences,undefined
[5] Tianjin University of Sciences and Technology,undefined
来源：
Scientific Reports | / 7卷
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摘要：
The control of ferromagnetism by light at room temperature is essential for the development of some optical-magnetic coupling devices, data storage and quantum computation techniques. In the present work, we demonstrate that the ferromagnetism of a semiconducting ZnO film on Pt substrate can be controlled by nonpolarized ultraviolet or violet light. The illumination of light with sufficiently high frequency photons could excite photogenerated electron-hole pairs in the semiconducting ZnO film. The amount of oxygen vacancies in the ZnO film and the appearance of built-in electric field due to the heterostructured ZnO/Pt may play important roles in the light-induced changes in the ferromagnetism of the ZnO film.
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