Temperature-dependent electrical, elastic and magnetic properties of sol-gel synthesized Bi(0.9)Ln(0.1)FeO(3) (Ln = Nd, Sm)

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Date
2012-03-28
Journal Title
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Publisher
IOP Publishing Ltd
Abstract
This report details correlated electrical, mechanical and magnetic behaviour in BiFeO3 ceramics doped with 10% Ln (Ln = Sm, Nd) ions on the Bi, or perovskite A, site and synthesized by a sol-gel method. The ceramics exhibit bulk piezoelectric and ferroelectric properties and clear ferroelectric domain patterns through piezoresponse force microscopy. Resonant ultrasound spectroscopy, dielectric spectroscopy and magnetometry studies show correlated magnetoelectromechanical behaviour and the existence of weak ferromagnetism for both compositions. An anomaly with simultaneous mechanical and magnetic signatures is discovered in both materials near room temperature, while previously reported transitions and anomalies are found to exhibit electro- and/or magnetomechanical coupling. Magnetism is significantly enhanced in the Sm doped sample, which is a promising multiferroic material. © 2012, IOP Publishing LTD.
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Keywords
Sol-gel process, Magnetism, Ceramics, Ferromagnetism, Piezoelectricity, Ferroelectric materials, Microscopy, Spectroscopy
Citation
Schiemer, J., Withers, R. L., Carpenter, M. A., Liu, Y., Wang, J. L., Norén, L., Li, Q., & Hutchison, W. (2012). Temperature-dependent electrical, elastic and magnetic properties of sol-gel synthesized Bi(0.9)Ln(0.1)FeO(3) (Ln = Nd, Sm). Journal of Physics: Condensed Matter, 24(12), 125901. doi:10.1088/0953-8984/24/12/125901
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