Effects of Nd and Co co-doping on phase,microstructure and ferromagnetic properties of bismuth ferrite ceramics |
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Authors: | Pornchanok Lawita Pasinee Siriprapa Anucha Watcharapasorn Sukanda Jiansirisomboon |
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Affiliation: | 1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;2. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand |
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Abstract: | In this work, the samples of Bi0.95Nd0.05CoxFe1?xO3 (BNFCO) with x=0, 0.03, 0.05 and 0.07 mol fraction, were prepared by a solid state reaction. The effect of Nd and Co co-doping concentration on phase, densification, microstructure and ferromagnetic properties were examined. The BNFCO powders were prepared using a mixed-oxide method and calcined at 800 °C for 2 h before being pressed and sintered at various temperatures in the range of 825–900 °C for 2 h. An increase in Co co-doping content increased density of the ceramics. Phase analysis by X-ray diffraction indicated the existence of rhombohedral phase for all BNFCO powders and ceramics. Microstructural investigation using the scanning electron microscope showed a reduction of grain size with increasing Co content. Magnetic hysteresis loops showed that remanent magnetization and coercive magnetic field of the Co-doped samples were improved. |
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