Nanoparticles of 0.25, 0.50, 0.75, and 1.0) in the size range of 6–12 nm have been synthesized by chemical precipitation followed by hydrothermal treatment. A strong correlation between the particle size and the zinc concentration has been identified. Mössbauer studies on these systems show that the cation distribution not only depends on the particle size but also on the preparation route. There are indications that in the present nanophase samples Fe occupies more tetrahedral sites as compared to the normal occupancy in the spinel ferrite structure. The occupancy returns to normal values after heat treatment at 1000 °C. Low-temperature Mössbauer studies indicate a significant amount of deviation of cation distribution from their bulk preferences.
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15 May 2004
Research Article|
May 06 2004
Cation distribution in nanosized Ni–Zn ferrites
Chandan Upadhyay;
Chandan Upadhyay
Department of Physics, Indian Institute of Technology, Kanpur 208 016, India
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H. C. Verma;
H. C. Verma
Department of Physics, Indian Institute of Technology, Kanpur 208 016, India
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S. Anand
S. Anand
Regional Research Laboratory, Bhubneshwar 751 013, India
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J. Appl. Phys. 95, 5746–5751 (2004)
Article history
Received:
October 20 2003
Accepted:
February 15 2004
Citation
Chandan Upadhyay, H. C. Verma, S. Anand; Cation distribution in nanosized Ni–Zn ferrites. J. Appl. Phys. 15 May 2004; 95 (10): 5746–5751. https://doi.org/10.1063/1.1699501
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