Studies of Electrical Conductivity and Complex Initial Permeability of Multiferroic xBa_(0.95)Sr_(0.05)TiO_3-(1-x)BiFe_(0.90)Gd_(0.10)O_3 Ceramics

摘要

Multiferroic xBa_(0.95)Sr_(0.05)TiO_3-(1-x)BiFe_(0.90)Gd_(0.10)O_3 [xBST-(1-x)BFGO] (x = 0.00, 0.10 and 0.20) ceramics were prepared by the standard solid-state reaction technique. Crystal structure of the ceramics was determined by X-ray diffraction pattern. All the compositions exhibited rhombohedral crystal structure. The tolerance factor 't' varied from 0.847 to 0.864. The AC conductivity spectrum followed the Jonscher's power law. The Nyquist plots indicated that only grains have the contribution to the resistance in this material and the values of grain resistance (R_g) increased with BST content. The real part of complex initial permeability decreased with the increase in frequency and increased with increasing BST content. Magnetoelectric coefficient was determined for all compositions. The maximum value of magnetoelectric coefficient was found to be 1.467 mV.cm~(-1).Oe~(-1) for x = 0.20.