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Ionic disorder and Yaffet–Kittel angle in nanoparticles of ZnFe 2 O 4 prepared by sol‐gel method
Author(s) -
Wang Li,
Zhou Qingguo,
Li Fashen
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301923
Subject(s) - nanoparticle , zinc ferrite , sol gel , redistribution (election) , mössbauer spectroscopy , materials science , ionic bonding , atmospheric temperature range , analytical chemistry (journal) , condensed matter physics , nanotechnology , chemistry , crystallography , ion , thermodynamics , physics , chromatography , organic chemistry , politics , political science , law
ZnFe 2 O 4 nanoparticles have been prepared by sol‐gel methods. Mössbauer spectra from 4.2 K to RT showed their magnetic ordering took place at much higher temperature than that of bulk zinc ferrite. Mössbauer measurements that cover the temperature range 4.2 K to room temperature were acquired in zero field and an applied magnetic field of 5 T. The large increase of T N for nanoparticles can be attributed mainly to the redistribution of Fe and Zn cations on the A and B sites. Nanoparticles with smaller size have bigger θ YK (Yaffet–Kittel angle). (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)