Mössbauer Study of Ni-Zn Ferrites Obtained by the Self-Propagated Method
Ni1−xZnxFe2O4 ferrites (x = 0, 0.5, 0.6 and 0.7) were prepared from self-propagated powders. Their structural and magnetic properties were characterised with x-ray diffraction, Mössbauer spectroscopy and ac susceptibility. Mössbauer analysis was performed at room temperature and at 15K, which was expected to yield useful information on the microstructure. The sintered samples present high initial permeability that increases as the concentration of Zn increases. The x= 0.7 Mössbauer spectrum exhibits superparamagnetism at room temperature and magnetic order at low temperature. The roles of cation-site occupation and magnetic coupling are discussed.
KeywordsIsomer Shift Hyperfine Field Magnetic Coupling Hyperfine Magnetic Field Eddy Current Loss
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
J. Smit, H.PJ. Wijn, Ferrites, Philips Technical Library, (1959)Google Scholar
A.M. Abdem, J. Magn. Magn. Mater. 185 (1998) 199.ADSCrossRefGoogle Scholar
L.K. Leung, B.J. Evans, A.H. Morrish, Phys. Rev. B 8 (1973) 29.ADSCrossRefGoogle Scholar
S.E. Jacobo, R Rotelo and E. Sileo, Physica B 2001 (in press)Google Scholar
M. Arshed, M. Siddique, M. Anwar-ul-Islam, N.M. Butt, Solid State Commun. 93 (1995) 599.ADSCrossRefGoogle Scholar
P. Werner, Z. Kristallogr. 120 (1964) 375.CrossRefGoogle Scholar
L. Wang, F.S. Li, J. Magn. Magn. Mater. 223 (2001) 233.ADSCrossRefGoogle Scholar
J.M. Daniels, A. Rosencwaig, Can. J. Phys. 48 (1970) 381.ADSCrossRefGoogle Scholar
H. Klug and L. Alexander in X-ray Diffraction Procedures
. ed., (John Wiley & Sons, 1973) p.656.Google Scholar
M. Arshed, M. Siddique, M. Anwar-ul-Islam, N.M. Butt, T. Abbas, M. Amhed, Solid State Commun. 93, 7 (1995) 599.ADSCrossRefGoogle Scholar
© Springer Science+Business Media Dordrecht 2002