[1] Zhang Yi, Wang Kai, Ren Zhiyan, Zhai Ya, et al. Structure and magnetic properties of Zn ferrite nanoparticles [J]. Journal of Southeast University (English Edition), 2009, 25 (3): 408-412. [doi:10.3969/j.issn.1003-7985.2009.03.026]
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Structure and magnetic properties of Zn ferrite nanoparticles(
)
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 25
- Issue:
- 2009 3
- Page:
- 408-412
- Research Field:
- Mathematics, Physics, Mechanics
- Publishing date:
- 2009-09-30
Info
- Title:
- Structure and magnetic properties of Zn ferrite nanoparticles
- Author(s):
- Zhang Yi; Wang Kai; Ren Zhiyan; Zhai Ya
- Department of Physics, Southeast University, Nanjing 211189, China
- PACS:
- O482
- DOI:
- 10.3969/j.issn.1003-7985.2009.03.026
- Abstract:
- A series of ZnxxFe3-xO4(x=0, 0.15, 0.30, 0.40, 0.48, 0.60, 0.70)nanoparticles prepared by hydrothermal method are studied by use of transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, superconducting quantum interference device magnetometer and Mössbauer spectrometer. All samples present a spinel structure. The lattice constant increases with the increase in the Zn content while the grain size decreases from 18 nm to 9 nm. Moreover, the saturation magnetization at 5 K and 293 K increases initially when x≤0.40 and subsequently decreases when x>0.40. At room temperature, Mössbauer spectra exhibit a change from a well-defined sextet spectrum to a doublet spectrum as the Zn content increases. The doublet spectrum begins to appear when x=0.6, while it begins when x=0.80 for the bulk materials. The results of magnetization and Curie temperature measurements indicate that the doublet spectrum is due to the surperparamagnetic state of the nanoparticles. Furthermore, the relationship between the hyperfine field variation and the cation distribution is discussed. The variation of magnetic properties is interpreted by the three-sublattice Yafet-Kittel(Y-K)model.
References:
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Memo
- Memo:
-
Biographies: Zhang Yi(1980—), male, graduate; Zhai Ya(corresponding author), female, doctor, professor, yazhai@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.50871029), Open Foundation of National Laboratory of Solid State Microstructure of Nanjing University, Open Foundation of Key Laboratory of the Thin Film Material of Jiangsu Province, the Science Research Foundation of Graduate School of Southeast University, the Jiangsu Provincial Innovation Project.
Citation: Zhang Yi, Wang Kai, Ren Zhiyan, et al. Structure and magnetic properties of Zn ferrite nanoparticles[J]. Journal of Southeast University(English Edition), 2009, 25(3): 408-412.