Light Control of Ferromagnetism in ZnO Films on Pt Substrate at Room Temperature.
Light Control of Ferromagnetism in ZnO Films on Pt Substrate at Room Temperature.
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室温下 Pt 基片上 ZnO 薄膜铁磁性的光控制
DOI：
10.1038/srep45642
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发表时间：
2017-04-10
影响因子：
4.6
通讯作者：
Hu J
中科院分区：
文献类型：
--
作者：
Xie J;Qin H;Hao Y;Cheng B;Liu W;Liu L;Ren S;Zhou G;Ji Z;Hu J
在室温下利用光来控制铁磁性对于某些光磁耦合器件、数据存储和量子计算技术的发展是必不可少的。在目前的工作中，我们证明了在Pt衬底上的半导体ZnO薄膜的铁磁性可以通过非偏振的紫外光或紫光来控制。具有足够高频率光子的光照射可以激发半导体ZnO膜中的光生电子-空穴对。ZnO薄膜中氧空位的数量以及ZnO/Pt异质结构引起的内建电场的出现可能在光致ZnO薄膜铁磁性的变化中起重要作用。
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.