Crystallographic and Magnetic Properties of Nanocrystalline Cobalt Ferrite Particels

Ultrafine cobalt ferrite particles have been sythesized using a microemulsion method. All peaks of X-ray diffraction patterns are fairly broad but correspond to a cubic spinel structure with the lattice constant 8.39 Å. The coercivity measured at 5 K is 15.1 kOe. The maximal magnetizations measured at 5 and 300 K are 13.2 and 10.7 emu/g, respectively. The particles behave ferrimagnetically at 5 K but superparamagnetically at 300 K. Superparamagnetic behavior of the particles at room temperature was confirmed by the coincidence of the M vs. H/T at different temperatures and the Mossbauer spectrum.
Publisher
한국세라믹학회(The Korean Ceramic Society )
Issue Date
1999
Language
ENG
Citation

THE KOREAN JOURNAL OF CERAMICS , v.5, no.3, pp.303 - 305

URI
http://hdl.handle.net/10203/75036
Appears in Collection
CH-Journal Papers(저널논문)
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