Characterization of CoCrFeO4 Nanocrystals Prepared
by a Sol-Gel Method
XIONG Gang, MAI Zhen-Hong, WANG Chao-Ying, NI Yong-Ming, ZHAO Zhong-Xian, XU Ming, LIU Cui-Xiu, LUO Guang-Ming
Institute of Physics and Centre for Condensed Matter Physics,
Chinese Academy of Sciences, Beijing 100080
Characterization of CoCrFeO4 Nanocrystals Prepared
by a Sol-Gel Method
XIONG Gang;MAI Zhen-Hong;WANG Chao-Ying;NI Yong-Ming;ZHAO Zhong-Xian;XU Ming;LIU Cui-Xiu;LUO Guang-Ming
Institute of Physics and Centre for Condensed Matter Physics,
Chinese Academy of Sciences, Beijing 100080
关键词 ：
81.05.-t ,
81.20.-n ,
81.40.-z
Abstract ： CoCrFeO4 nanocrystals have been synthesized using a sol-gel method. The specimen has an average grain size of 8.1 nm. The zero-field-cooled and field-cooled curves show a superparamagnetic transition occurring at a blocking temperature of TB ≈ 249 K. The increase in coercivity of CoCrFeO4 nanocrystals with the decreasing temperature has been detected below the blocking temperature and could be explained by the Stoner-Wohlfarth theory. The temperature dependence of saturation magnetization shows that Bloch's law holds but with the Bloch exponent lower than the bulk value.
Key words ：
81.05.-t
81.20.-n
81.40.-z
出版日期: 2001-05-01
:
81.05.-t
(Specific materials: fabrication, treatment, testing, and analysis)
81.20.-n
(Methods of materials synthesis and materials processing)
81.40.-z
(Treatment of materials and its effects on microstructure, nanostructure, And properties)
引用本文:
XIONG Gang;MAI Zhen-Hong;WANG Chao-Ying;NI Yong-Ming;ZHAO Zhong-Xian;XU Ming;LIU Cui-Xiu;LUO Guang-Ming. Characterization of CoCrFeO4 Nanocrystals Prepared
by a Sol-Gel Method[J]. 中国物理快报, 2001, 18(5): 692-694.
4 Nanocrystals Prepared
by a Sol-Gel Method. Chin. Phys. Lett., 2001, 18(5): 692-694.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2001/V18/I5/692
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