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- Title
Comparison study on magnetic property of CoZnFeO powders by template-assisted sol-gel and hydrothermal methods.
- Authors
He, H.
- Abstract
The nickel cobalt ferrite (CoZnFeO) nanopowders were synthesized by a sol-gel method and a hydrothermal method. Polyethylene glycol (PEG-4000) and carboxymethyl cellulose (CMC) were used as the templating agents for controlling the anisotropy and the microstructure of the CoZnFeO nanopowders. The microstructure and magnetic property of the synthesized powders were comparatively studied. The results indicated that the synthesis technique and the template had remarkable dependence on the microstructure and the magnetic property of the nanopowders. The powder synthesized by the sol-gel method without any template had a maximum saturation magnetization of 73.6 emu g closing to the value of the bulk material (80 emu g), while the PEG-4000 and CMC decreased the magnetization to 54.0 and 60.9 emu g. The three powders showed almost same coercivity (314-343 Oe). However, the PEG-4000 and CMC in the hydrothermal process obviously decreased and increased the coercivity respectively from 1,464 Oe to 5 Oe and 4,304 Oe but had small effect of the magnetization (55.5-59.0 emu g).
- Subjects
MAGNETIC properties of nanoparticles; MAGNETIC properties; SOL-gel processes; POLYETHYLENE glycol; COMPARATIVE studies; SCANNING electron microscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2012, Vol 23, Issue 5, p995
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-011-0535-2