title: Light Control of Ferromagnetism in ZnO Films on Pt Substrate at Room Temperature.
abstract: 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.
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Jihao
authors.initials: J
authors.lastname: Xie
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Qin
authors.affiliation: Department of Physics, College of Sciences, Tianjin University of Sciences and Technology, Tianjin 300457, People's Republic of China.
authors.forename: Yanming
authors.initials: Y
authors.lastname: Hao
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Cheng
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Weikang
authors.initials: W
authors.lastname: Liu
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Liu
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Shaoqing
authors.initials: S
authors.lastname: Ren
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Guangjun
authors.initials: G
authors.lastname: Zhou
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Ziwu
authors.initials: Z
authors.lastname: Ji
authors.affiliation: School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
authors.forename: Jifan
authors.initials: J
authors.lastname: Hu