Effects on dielectric and magnetic properties of Cr-doped Bi^sub 0.9^Ba^sub 0.1^Fe^sub 1-x^Cr^sub x^O3 ceramic

In this paper, Cr-doped Bi^sub 0.9^Ba^sub 0.1^Fe^sub 1-x^Cr^sub x^O3 (x = 0.00, 0.05, 0.10, 0.15, 0.20) ceramic materials were prepared by traditional state solid synthesized method, and the effects of Cr^sup 3+^ ion on magnetic and dielectric properties were investigated. All samples showed BiFeO3 phase formation were successful synthesized. The SEM images showed the shape of samples changed from regular to irregular shape. With increasing of Cr^sup 2+^ ions, Saturation magnetization (M ^sub s^) increased from 5.24 to 8.6 emu/g, and then decreased to 7.31 emu/g, and coercivity (H ^sub c^) increased from 110.66 to 256.49 Oe. All the samples showed high dielectric constants at low frequency and the values of dielectric constants decreased slightly with frequency increasing. Delectric loss (tanδ) values kept a steady in a wide range frequency of 10-600 MHz. They ranged in tanδ from 0.01 to 0.07, which was a low dielectric loss in Bi^sub 0.9^Ba^sub 0.1^Fe^sub 1-x^Cr^sub x^O3 ceramics.