Optical and magnetic properties of Fe doped ZnO nanoparticles obtained by hydrothermal synthesis
Optical and magnetic properties of Fe doped ZnO nanoparticles obtained by hydrothermal synthesis
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DOI：
10.1155/2014/792102
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发表时间：
2014
影响因子：
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通讯作者：
Xiao-juan Wu;Zhiqiang Wei;Lingling Zhang;Xuan Wang;Hua Yang;Jinlong Jiang
中科院分区：
文献类型：
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作者：
Xiao-juan Wu;Zhiqiang Wei;Lingling Zhang;Xuan Wang;Hua Yang;Jinlong Jiang
采用水热法合成了不同掺杂浓度（x = 0，0.01，0.05，0.10和0.20）的稀磁半导体Zn 1-xFexO纳米粒子。采用X射线衍射（XRD）、能谱仪（EDS）、高分辨透射电子显微镜（HRTEM）、拉曼散射光谱（拉曼）、光致发光光谱（PL）和振动样品磁强计（VSM）对样品的晶体结构、形貌、光学和磁性进行了表征。实验结果表明，采用该方法合成的样品均为六方纤锌矿结构，结晶良好，无其他杂质相，形貌为椭球状纳米颗粒。所有的Fe 3+都成功地取代了Zn 2+的晶格位置，生成单相的Zn 1-xexO。拉曼光谱表明，峰向高频移动。随着Fe ~（3+）浓度的增加，PL谱发生轻微的蓝移，紫外发射消失。磁性测试表明，Fe掺杂ZnO样品在室温下表现出铁磁性，饱和磁化强度随着Fe掺杂量的增加而增强。
Diluted magnetic semiconductors Zn1-xFexO nanoparticles with different doping concentration (x = 0, 0.01, 0.05, 0.10, and 0.20) were successfully synthesized by hydrothermal method. The crystal structure, morphology, and optical and magnetic properties of the samples were characterized by X-ray diffraction (XRD), energy dispersive spectrometer (EDS), high-resolution transmission electron microscopy (HRTEM), Raman scattering spectra (Raman), photoluminescence spectra (PL), and the vibrating sample magnetometer (VSM). The experiment results show that all samples synthesized by this method possess hexagonal wurtzite crystal structure with good crystallization, no other impurity phases are observed, and the morphology of the sample shows the presence of ellipsoidal nanoparticles. All the Fe3+ successfully substituted for the lattice site of Zn2+ and generates single-phase Zn1-xexO. Raman spectra shows that the peak shifts to higher frequency. PL spectra exhibit a slight blue shift and the UV emission is annihilated with the increase of Fe3+ concentration. Magnetic measurements indicated that Fe-doped ZnO samples exhibit ferromagnetic behavior at room temperature and the saturation magnetization is enhanced with the increase of iron doping content.