Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 223, Issue 3, Pages 233-237Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-8853(00)01331-7
Keywords
ferrite; nanoparticle; Mossbauer spectra
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Ni1-xZnxFe2 O-4 (0.0 less than or equal to x less than or equal to 1.0) nanoparticles have been prepared by the polyvinyl alcohol (PVA) sol-gel method. The lattice parameter of Ni-Zn nanoparticle is larger than that of the bulk material. The Mossbauer spectra of the samples showed the presence of ultrafine particles exhibiting superparamagnetic relaxation at room temperature and an ordered magnetic structure at 77 K. (C) 2001 Elsevier Science B.V. All rights reserved.
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