Dielectric, Piezoelectric and Magnetic Properties of Ferroelectromagnet <font>Pb</font>(<font>Fe</font>_1/3<font>Nb</font>_2/3)<font>O</font>₃<font>(PFN)</font> Ceramics

Abstract

Ferroelecromagnet Pb ( Fe 1/3 Nb 2/3 ) O 3 has been synthesized and its crystal structure and dielectric, electrostrictive and magnetic properties have been investigated. The structure of PFN ceramics examined by X-ray diffraction was found perovskite-like. The dielectric constant and dielectric loss as a function of temperature at different frequencies was measured. A para-ferroelectric transition at a temperature of 403 K was found and the maximum dielectric constant at a frequency of 500 Hz at the transition temperature is as high as 9050. The piezoelectric strain at room temperature was examined. The magnetization measurements as a function of temperature in the temperature region from room temperature to 648 K with different applied magnetic fields revealed that the compound is antiferromagnetic.