Defects enhanced ferromagnetism in Cu-doped ZnO thin films

被引：12

作者：

Zhuo, Shi-Yi ^{[1
,2
]}

Liu, Xue-Chao ^{[1
]}

Xiong, Ze ^{[1
,2
]}

Yang, Jian-Hua ^{[1
]}

Shi, Er-Wei ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Thin films; Point defects; Ferromagnetism; ROOM-TEMPERATURE FERROMAGNETISM; DILUTED MAGNETIC SEMICONDUCTORS;

D O I：

10.1016/j.ssc.2011.11.038

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present here new evidences of point defects enhanced ferromagnetism in Cu-doped ZnO thin films by different characterization methods. Cu-doped ZnO thin films with Cu concentrations ranging from 0.05 to 5 at.% were prepared by an inductively coupled plasma enhanced physical vapor deposition system. Room-temperature ferromagnetism is observed in all the films. The saturation magnetization shows an increasing trend with the increase of Cu concentration except a slight decrease for the 1 at.% Cu-doping. Further study performed by Raman spectra, X-ray absorption spectra and extended X-ray absorption fine structure indicate the existence of Cu2+ ions and point defects in all the films. The local structural characterization and magnetic properties reveal that the sample with larger saturation magnetization has a higher concentration of point defects. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：257 / 260

页数：4

共 24 条

[1] Defect induced ferromagnetism in carbon-doped ZnO thin films [J].

Akbar, Sadaf ;

Hasanain, S. K. ;

Abbas, Manzar ;

Ozcan, S. ;

Ali, B. ;

Shah, S. Ismat .

SOLID STATE COMMUNICATIONS, 2011, 151 (01) :17-20

[2] Magneto-optical properties of ZnO-based diluted magnetic semiconductors [J].

Ando, K ;

Saito, H ;

Jin, ZW ;

Fukumura, T ;

Kawasaki, M ;

Matsumoto, Y ;

Koinuma, H .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :7284-7286

[3] Room temperature ferromagnetism in nanostructured ZnO-Al system [J].

Chen, S. J. ;

Suzuki, K. ;

Garitaonandia, J. S. .

APPLIED PHYSICS LETTERS, 2009, 95 (17)

[4] Electronic structure and magnetic moments of 3d transition metal-doped ZnO [J].

Chien, CH ;

Chiou, SH ;

Guo, GY ;

Yao, YD .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 282 :275-278

[5] Donor impurity band exchange in dilute ferromagnetic oxides [J].

Coey, JMD ;

Venkatesan, M ;

Fitzgerald, CB .

NATURE MATERIALS, 2005, 4 (02) :173-179

[6] Temperature dependence of raman scattering in ZnO [J].

Cusco, Ramon ;

Alarcon-Llado, Esther ;

Ibanez, Jordi ;

Artus, Luis ;

Jimenez, Juan ;

Wang, Buguo ;

Callahan, Michael J. .

PHYSICAL REVIEW B, 2007, 75 (16)

[7] Origin of room temperature ferromagnetism in ZnO:Cu films [J].

Herng, T. S. ;

Lau, S. P. ;

Yu, S. F. ;

Yang, H. Y. ;

Ji, X. H. ;

Chen, J. S. ;

Yasui, N. ;

Inaba, H. .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)

[8] Role of donor defects in enhancing ferromagnetism of Cu-doped ZnO films [J].

Li, Xiao-Li ;

Xu, Xiao-Hong ;

Quan, Zhi-Yong ;

Guo, Jun-Feng ;

Wu, Hai-Shun ;

Gehring, G. A. .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (10)

[9] Magnetic properties of Mn-doped ZnO diluted magnetic semiconductors [J].

Liu Xue-Chao ;

Zhang Hua-Wei ;

Zhang Tao ;

Chen Bo-Yuan ;

Chen Zhi-Zhan ;

Song Li-Xin ;

Shi Er-Wei .

CHINESE PHYSICS B, 2008, 17 (04) :1371-1376

[10] Local structures of copper-doped ZnO films [J].

Ma, Qing ;

Buchholz, D. Bruce ;

Chang, Robert P. H. .

PHYSICAL REVIEW B, 2008, 78 (21)

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