Magnetic,ferroelectric and magnetoelectric properties of Ba-doped BiFeO3 |
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Authors: | Rajasree Das K Mandal |
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Institution: | Department of Materials Science, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098, India |
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Abstract: | Bi1–xBaxFeO3 (0.0≤x≤0.25) ceramics are prepared by chemical synthesis route. At room temperature, antiferromagnetic BiFeO3 is converted to ferromagnetic on doping Ba. A large change in the magnetization is observed around 370 °C which is close to the Neel temperature (TN) of parent compound. Another magnetic transition is also observed near 600 °C. Spin canting or impurity phase could be a probable reason for the origin of ferromagnetism in both cases. Ferroelectric and magnetic transitions of the compounds shift towards higher temperature with Ba-doping concentration. Anomaly in the dielectric constant is also observed near the TN of BiFeO3. The composition x=0.15 shows the maximum magnetic moment at room temperature while better fatigue resistance and maximum magnetoelectric coupling are observed for x=0.20 composition. |
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Keywords: | Bismuth ferrite Multiferroic Magnetoelectric Fatigue resistance Ferroelectric |
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