Dependence of the magnetic properties of the dilute magnetic semiconductor Zn1-xMnxO nanorods on their Mn doping levels

被引:8
作者
Thongjamroon, S. [1 ]
Ding, J. [2 ]
Herng, T. S. [2 ]
Tang, I. M. [3 ]
Thongmee, S. [1 ]
机构
[1] Kasetsart Univ, Fac Sci, Dept Phys, Bangkok 10900, Thailand
[2] Natl Univ Singapore, Dept Mat Sci, Fac Engn, Singapore 117576, Singapore
[3] Kasetsart Univ, Dept Mat Sci, Fac Sci, Bangkok 10900, Thailand
关键词
Dilute magnetic semiconductors (DMS); Wurtzite structure ZnO nanorods; Manganese impurities; Saturation magnetization; Energy dispersive X-ray; Photoluminescence detection of defects; ZINC-OXIDE; DOPED ZNO; FERROMAGNETISM; NANOPARTICLES;
D O I
10.1016/j.jmmm.2017.04.087
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of Mn doping on the ferromagnetic properties of the dilute magnetic semiconductor Zn(1-x)MnxO nanorods (NR's) having the nominal composit-ions x = 0, 0.01, 0.03, 0.04 and 0.05 grown by a low temperature hydrothermal method are studied. Energy dispersive X-ray (EDX) is used to determine the actual amounts of the elements in each NR's. X-ray diffraction, scanning electron microscopy, photoluminescence and vibrating sample magnetometer measurements are used to observe the effects of the Mn substitution on the properties of the doped ZnO and to relate the changes in the properties to changes in the defect content. It is observed that the saturation magnetization of the Mn ions in the wurtzite structure varies from 0.0210 mu(B)/Mn2+ to 0.0234 mu(B)/Mn2+ reaching a high of 0.0251 mu(B)/Mn2+ as the Mn concentrations is varied from 0.9 to 7.36 atomic%. It is argued that the changes in the saturation magnetization are due to the competition between the direct Mn-Mn exchange interaction and the indirect Mn-O-Mn exchange interaction in the doped Mn ZnO NP's. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:391 / 396
页数:6
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