Room-temperature ferromagnetism induced by Cu vacancies in Cu x(Cu2O)1− x granular films
Xie Xin-Jiana), Li Hao-Bob), Wang Wei-Chaob), Lu Fengb), Yu Hong-Yunc), Wang Wei-Hua†b), Cheng Ya-Hui‡b), Zheng Rong-Kund), Liu Huib)
       
Room-temperature magnetization curves of Cu x Cu2O1− x granular films with different x . The original data is shown in panel (a) and the data subtracting background is shown in panel (b). The inset of panel (b) is the variation of saturation magnetization with the ratio x .