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

被引：0
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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