The mechanism of photo-regulated magnetization in copper oxide films on Pt substrate. (December 2019)

• Record Type: Journal Article
• Authors: Xie, Jihao; Cheng, Bin; Liu, Liang; Liu, Weikang; Ren, Shaoqing; Miao, Tingting; Gao, Chengyong; Zhou, Guangjun; Qin, Hongwei; Hu, Jifan
• Is Part Of: Solid state communications. Volume 303/304(2019)
• Publication Date: 2019-12
• Subjects: A. copper oxide film -- D. interface-related ferromagnetism -- D. photo-regulated magnetization -- D. built-in electric field; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2019.113732
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: We demonstrate that the copper oxide films deposited on Pt/Ti/SiO2 /Si substrates exhibit the room temperature ferromagnetism. The ferromagnetism would be mainly induced by the indirect double exchange at interface between CuO and Cu2 O. The ferromagnetism (mainly saturation magnetization) could be enhanced at room temperature by visible light. The built-in electric field has a great effect on the photo-regulated magnetization. We suggested that the enhanced indirect double exchange affect the changed ferromagnetism of copper oxide film, which is associated with the valence transition of Cu ion in a local area. Highlights: The interface-related ferromagnetism of copper oxide films was found. The ferromagnetism of copper oxide can be modulated by violet and blue light. The built-in electric field has an effect on the photo-regulated ferromagnetism. Our work provides a possible way to control the ferromagnetism at room temperature.