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The Influence of chemical composition on magnetic properties and magnetostriction coefficient of cobalt ferrites

O. CALTUN1,* , I. DUMITRU1, M. FEDER2, L. DIAMANDESCU2, I. BIBICU2, F. VASILIU2, N. LUPU3, V. VILCEANU4

Affiliation

  1. Faculty of Physics and Carpath Center, Al. I. Cuza University, 700506 Iasi, Romania
  2. National Institute of Material Physics, P.O. Box MG-7, Bucharest, Romania
  3. National Institute for Technical Physics, Bd. Mangeron 47, Iasi, Romania
  4. S.C. Afero Exim srl, P. O. Box 39-D6, Bucharest, Romania

Abstract

Four series of cobalt ferrites were prepared by conventional ceramic method. Calcined powders were analyzed by X-ray diffraction and Mössbauer spectroscopy to characterize the crystal structure. Green bodies were sinterized at temperatures between 1250o -1300o C, in air, for 5 hours. Chemical composition of samples and sintering parameters have a strong influence on the magnetic and magnetostrictive properties of the sintering bodies..

Keywords

Cobalt ferrites, Substitutions, Magnetic properties, Magnetostriction.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

O. CALTUN, I. DUMITRU, M. FEDER, L. DIAMANDESCU, I. BIBICU, F. VASILIU, N. LUPU, V. VILCEANU, The Influence of chemical composition on magnetic properties and magnetostriction coefficient of cobalt ferrites, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1775-1778 (2008)