Acceptor-defect mediated room temperature ferromagnetism in (Mn2+, Nb5+) co-doped ZnO nanoparticles

被引：14
|
作者：
Satheesan, M. K. [1 ]
Vani, K. [2 ]
Kumar, Viswanathan [2 ]
机构：
[1] Kannur Univ, Dept Chem, Sch Chem Sci, Kannur, Kerala, India
[2] Govt India, C MET, Minist Elect & Informat Technol, Athani PO, Trichur 680581, Kerala, India
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 11期
关键词：
Zinc oxide; co-doping; Acceptors; Ferromagnetism; ELECTRON-PARAMAGNETIC-RESONANCE; 1ST-PRINCIPLES; VACANCIES; EVOLUTION; OXIDE; IONS;
D O I：
10.1016/j.ceramint.2017.03.132
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study we report room temperature ferromagnetism in Manganese and Niobium co-doped ZnO nanoparticles synthesized by sol-gel method. The room temperature ferromagnetic ordering in the Zn0.99-2.5xNbxMn0.01O nanoparticles is found to vary as a function of Nb5+ concentration. Highest value of saturation magnetization, M-s was obtained for the composition co-doped with 2% niobium. Results obtained from Electron paramagnetic resonance and Photoluminescence studies have been combined to establish the acceptor-defect mediated ferromagnetic ordering in these nanoparticles. A quasi-indirect exchange mechanism mediated by singly ionized zinc vacancies, V-Zn is proposed to explain the enhanced ferromagnetic ordering in (Mn, Nb) co-doped ZnO nanoparticles.
引用
收藏
页码：8098 / 8102
页数：5
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