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MAGNETOELECTRIC COUPLING IN THE MULTIFERROIC PbFe2/3W1/3O3 -PbTiO3 SYSTEM

L. Mitoseriu1,2,* , D. Marré3, A. S. Siri3, A. Stancu1, C. E. Fedor1, P. Nanni2

Affiliation

  1. Dept. of Electricity, Al. I. Cuza University, Iasi 700506, Romania
  2. DICheP, University of Genoa, I-16129, Italy
  3. Physics Department, University of Genoa & INFM, Genoa I-16146, Italy

Abstract

The properties of the ferroic (1-x)PbFe2/3W1/3O3-xPbTiO3 ceramics with various compositions in the range x˛(0, 0.50) were investigated. The Raman spectra of the compounds show temperature and composition-induced phase transitions relaxor ferroelectric and ferroelectric-paraelectric. The magnetic properties of the system change with composition. A magnetodielectric coupling is shown by an anomaly of the magnetic hysteresis loop found in the Curie range of temperatures for the relaxor PbFe2/3W1/3O3 ceramic. Two types of superexchange magnetic interactions and a succession of magnetic transitions with Néel temperatures dependent on the composition were found in the solid solution. The present results confirm the hypothesis of a relationship between the magnetic properties and the nanopolar ordering in the relaxor-ferroelectric system..

Keywords

Ferroic, Relaxor, Magnetic phase transitions.

Submitted at: April 26, 2004
Accepted at: June 10, 2004

Citation

L. Mitoseriu, D. Marré, A. S. Siri, A. Stancu, C. E. Fedor, P. Nanni, MAGNETOELECTRIC COUPLING IN THE MULTIFERROIC PbFe2/3W1/3O3 -PbTiO3 SYSTEM, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 723-728 (2004)