Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films

doi:10.1007/s12204-012-1356-z

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (6): 738-742.doi: 10.1007/s12204-012-1356-z

Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films

LI Jian-jun1,2 (李建军), ZHU Jin-bo1* (朱金波), ZHANG Li-ting1 (张丽亭),LIU Yin1 (刘银), HAO Wei-chang2 (郝维昌)

(1. Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2. Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, China)

出版日期:2012-12-31 发布日期:2012-12-30
通讯作者: ZHU Jin-bo1* (朱金波) E-mail: lijj3@aust.edu.cn

Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films

LI Jian-jun1,2 (李建军), ZHU Jin-bo1* (朱金波), ZHANG Li-ting1 (张丽亭),LIU Yin1 (刘银), HAO Wei-chang2 (郝维昌)

(1. Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2. Center of Materials Physics and Chemistry, Beihang University, Beijing 100191, China)

Online:2012-12-31 Published:2012-12-30
Contact: ZHU Jin-bo1* (朱金波) E-mail: lijj3@aust.edu.cn

摘要/Abstract

摘要： Zn0.95-xCo0.05CuxO (atomic ratio, x = 0—8%) thin films are fabricated on Si(111) substrate by reactive magnetron sputtering method. Detailed characterizations indicate that the doped Cu ions substitute the Zn2+ ions in ZnO lattice. The doped Cu ions are in +1 and +2 mixture valent state. The ferromagnetism of the Zn0.95-xCo0.05CuxO film increases gradually with the increase of the Cu+ ion concentration till x = 6%, but decreases for higher Cu concentration. Experimental results indicate that the increase of ferromagnetism is not owing to the magnetic contribution of Cu+ ions themselves, but owing to the enhancement of magnetic interaction between Co2+ ions, which suggests that p-type doping of Cu+ ions plays an important role in mediating the ferromagnetic coupling between Co ions.

关键词: Zn0.95-xCo0.05CuxO films, magnetic semiconductors, bound magnetic polaron model, co-doping

Abstract: Zn0.95-xCo0.05CuxO (atomic ratio, x = 0—8%) thin films are fabricated on Si(111) substrate by reactive magnetron sputtering method. Detailed characterizations indicate that the doped Cu ions substitute the Zn2+ ions in ZnO lattice. The doped Cu ions are in +1 and +2 mixture valent state. The ferromagnetism of the Zn0.95-xCo0.05CuxO film increases gradually with the increase of the Cu+ ion concentration till x = 6%, but decreases for higher Cu concentration. Experimental results indicate that the increase of ferromagnetism is not owing to the magnetic contribution of Cu+ ions themselves, but owing to the enhancement of magnetic interaction between Co2+ ions, which suggests that p-type doping of Cu+ ions plays an important role in mediating the ferromagnetic coupling between Co ions.

Key words: Zn0.95-xCo0.05CuxO films, magnetic semiconductors, bound magnetic polaron model, co-doping

中图分类号:

O 472.5

LI Jian-jun1,2 (李建军), ZHU Jin-bo1* (朱金波), ZHANG Li-ting1 (张丽亭),LIU Yin1 (刘银), HA. Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films[J]. 上海交通大学学报（英文版）, 2012, 17(6): 738-742.

LI Jian-jun1,2 (李建军), ZHU Jin-bo1* (朱金波), ZHANG Li-ting1 (张丽亭),LIU Yin1 (刘银), HAO Wei-chang2 (郝维昌). Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(6): 738-742.

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Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films

Effect of Cu Co-doping on the Magnetism of Zn0.95Co0.05O Films

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