›› 2014, Vol. 23 ›› Issue (9): 97503-097503.doi: 10.1088/1674-1056/23/9/097503
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
彭英姿a b, 李源a b, 白茹b, 霍德璇b c, 钱正洪b
Peng Ying-Zi (彭英姿)a b, Li Yuan (李源)a b, Bai Ru (白茹)b, Huo De-Xuan (霍德璇)b c, Qian Zheng-Hong (钱正洪)b
摘要: Zn and Co multi-doped CeO2 thin films have been prepared using an anodic electrochemical method. The structures and magnetic behaviors are characterized by several techniques, in which the oxygen states in the lattice and the absorptive oxygen bonds at the surface are carefully examined. The absorptive oxygen bond is about 50% of the total oxygen bond by using a semi-quantitative method. The value of actual stoichiometry δ' is close to 2. The experimental results indicate that the thin films are of a cerium oxide-based solid solution with few oxygen vacancies in the lattice and many absorptive oxygen bonds at the surface. Week ferromagnetic behaviors were evidenced by observed M-H hysteresis loops at room temperature. Furthermore, an evidence of relative ferromagnetic contributions was revealed by the temperature dependence of magnetization. It is believed that the ferromagnetic contributions exhibited in the M-H loops originate from the absorptive oxygen on the surface rather than the oxygen vacancies in the lattice.
中图分类号: (Magnetic semiconductors)