Room-temperature ferromagnetism in epitaxial p-type K-doped ZnO films

被引:23
作者
Huang, Yubin [1 ]
Zhou, Wei [1 ]
Wu, Ping [1 ]
机构
[1] Tianjin Univ, Fac Sci, Dept Appl Phys, Inst Adv Mat Phys,Tianjin Key Lab Low Dimens Mat, Tianjin 300072, Peoples R China
基金
中国国家自然科学基金;
关键词
Epitaxial ZnO thin film; Ferromagnetism; p-type conductivity; First-principle calculation;
D O I
10.1016/j.ssc.2013.12.024
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Room temperature ferromagnetism with p-Lype conductivity was observed in epitaxial K-doped ZnO films prepared by RF-magnetron sputtering. The coincident changes in the electrical, optical and magnetic properties indicate that the cation holes play important roles in mediating the ferromagnetism in K-doped ZnO films. The maximum saturation magnetization of 8 emu/cm(3) was obtained in the 8% K-doped film and the thermal annealing in air could stabilize the ferromagnetic signature. Finally, first-principle calculations reveal that the magnetic properties in K-doped ZnO films are attributed to the strong p-p interaction between the unpaired 2p electrons at O sites. (C) 2013 Elsevier Ltd. All rights reserved
引用
收藏
页码:31 / 34
页数:4
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