Ferromagnetism of Ni-Doped ZnO Powders Prepared by Sol-Gel Method above Room Temperature
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第1期
论文作者：Zheng Youdou Yu Huiqiang Chen Lin Xie Zili Li Binbin Tao Zhikuo Xiu Xiangqian Zhang Rong
Key words：sol-gel; Ni-doped; ZnO powder; ferromagnetism;
Abstract: The magnetic and structural properties of 2% Ni-doped ZnO powers prepared by sol-gel method were studied. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) of the sample do not show existence of any signal of second phase. The X-photoelectron spectroscopy (XPS) of the sample shows the chemical valence of Ni is +2 and the real Ni concentration is 2.19% determined by X-ray fluorescence spectra (XRFS). The magnetic property performed with superconducting quantum interference device (SQUID) shows that the sample exhibits ferromagnetism above room temperature and the Curie temperature (TC) is about 600 K.
Zheng Youdou1，Yu Huiqiang2，Chen Lin1，Xie Zili1，Li Binbin1，Tao Zhikuo1，Xiu Xiangqian1，Zhang Rong1
(1.Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Department of Physics, Nanjing University, Nanjing 210093, China;
2.Modern Analysis Center, Nanjing University, Nanjing 210093, China)
Abstract:The magnetic and structural properties of 2% Ni-doped ZnO powers prepared by sol-gel method were studied. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) of the sample do not show existence of any signal of second phase. The X-photoelectron spectroscopy (XPS) of the sample shows the chemical valence of Ni is +2 and the real Ni concentration is 2.19% determined by X-ray fluorescence spectra (XRFS). The magnetic property performed with superconducting quantum interference device (SQUID) shows that the sample exhibits ferromagnetism above room temperature and the Curie temperature (TC) is about 600 K.
Key words:sol-gel; Ni-doped; ZnO powder; ferromagnetism;
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