The effects of Zn vacancies on ferromagnetism in Cu-doped ZnO films controlled by oxygen pressure and Li doping
The effects of Zn vacancies on ferromagnetism in Cu-doped ZnO films controlled by oxygen pressure and Li doping
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氧压和Li掺杂控制Zn空位对Cu掺杂ZnO薄膜铁磁性的影响
DOI：
10.1088/1674-1056/22/6/067503
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发表时间：
2013-06
影响因子：
1.7
通讯作者：
Yong, Jiang
中科院分区：
文献类型：
--
作者：
Farooq, Hassan M.;Zhou Li-Gong;Xu Xiao-Guang;Yong, Jiang
对Zn_（0.99）Cu_（0.01）O薄膜进行了理论和实验研究。采用脉冲激光沉积法在Pt（111）/Ti/SiO2/Si衬底上制备了不同氧分压下的薄膜，研究了薄膜的铁磁性能随氧分压的变化。对薄膜的结构、磁性和光学性质进行了研究，发现所有样品都具有典型的纤锌矿结构，薄膜具有室温铁磁性。样本是在600？C和氧压为10 Pa的大的饱和磁化强度为0.83？B/Cu。第一性原理计算表明，（Cu，Li）共掺杂ZnO的铁磁性增强归因于Zn空位（VZn）的存在。光致发光分析表明，在Zn 0. 99 Cu 0. 01 O和（Cu，Li）共掺杂ZnO薄膜中均存在VZn，这对铁磁性的增强起着重要作用。
Zn0.99Cu0.01O films were studied experimentally and theoretically. The films were prepared by pulsed-laser deposition on Pt(111)/Ti/SiO2/Si substrates under various oxygen pressures to investigate the growth-dependence of the ferromagnetic properties. The structural, magnetic, and optical properties were studied, and it was found that all the samples possess a typical wurtzite structure, and that the films exhibit room-temperature ferromagnetism. The sample deposited at 600 ?C and an oxygen pressure of 10 Pa showed a large saturation magnetization of 0.83 ?B/Cu. The enhanced ferromagnetism in the (Cu, Li)-codoped ZnO is attributable to the existence of Zn vacancies (VZn), as shown by first-principles calculations. The photoluminescence analysis demonstrated the existence of VZn in both Zn0.99Cu0.01O and (Cu, Li)-codoped ZnO thin films, and this plays an important role in the increase of ferromagnetism, according to the results of first-principles calculations.
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影响因子：
4.5
作者：
Hailing Yang;Xiaoguang Xu;Shizhe Wu;Kai Wu;Chao‐Wu Ai;J. Miao;Yong Jiang
通讯作者：
Hailing Yang;Xiaoguang Xu;Shizhe Wu;Kai Wu;Chao‐Wu Ai;J. Miao;Yong Jiang
影响因子：
3.2
作者：
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N. Ohashi;T. Sekiguchi;K. Aoyama;T. Ohgaki;Y. Terada;I. Sakaguchi;T. Tsurumi;H. Haneda
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
3.7
作者：
L. Ye;A. Freeman;B. Delley
通讯作者：
L. Ye;A. Freeman;B. Delley
影响因子：
3.2
作者：
Xiaoli Li;Xiaohong Xu;Z. Quan;Jun Guo;Hai-shun Wu;G. Gehring
通讯作者：
Xiaoli Li;Xiaohong Xu;Z. Quan;Jun Guo;Hai-shun Wu;G. Gehring