In this paper, we prepared the Co substituted Bi0.7Y0.2Ba0.1Fe0.98−xCoxO3 (x = 0.00, 0.02, 0.04, 0.06) ceramic materials by conventional solid-state reaction method. In order to further enhance the magnetic properties, we chose Co3+ ions to substitute Fe3+ ions in Bi0.7Y0.2Ba0.1Fe0.98O3 ceramic materials. Phase formation, dielectric and magnetic properties of the samples were investigated by X-ray diffractometer, scanning electron microscope, impedance analysis and vibrating sample magnetometer. The results indicated that Co3+ ion substitution could cause the lattice distortion, but did not change the phase formation of samples. With Co3+ increasing from 0.00 to 0.06, the saturation magnetization (Ms) increased by 24 % (from 7.81 to 9.68 emu/g), the coercivity (Hc) increased by 50 % (from 110.56 to 166.68 Oe). With the increasing of Co substitute amount, the real part of dielectric permittivity (ε′) firstly increased by 71 % to reach 58.56 and then decreased by 4 % to reach 56.26, and kept stable value in a wild frequency range of 10 MHz–1 GHz.
Co2O3 Saturation Magnetization Dielectric Permittivity BiFeO3 Solid State Reaction Method
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The authors acknowledge the Financial support by the Open Foundation of National Engineering Research Center of Electromagnetic Radiation Control Materials (ZYGX2014K003-8), and by the National Nature Science Foundation of China (Nos. 61271038 and 51472042).
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