Room Temperature Magnetoelectric Coupling in Bi₅Ti₃FeO₁₅ Ceramics

Abstract:

Magnetoelectric(ME) coupling at room temperature(RT) in four-layered perovskite Bi5Ti3FeO15(BTFO) ceramics prepared by conventional solid state reaction method was observed. Unsaturated ferroelectric hysteresis loop with 2Pr=0.464 μC/cm2 and 2Ec=25 kV/cm at an applied electric field 58 kV/cm was obtained because of lower breakdown voltage which maybe induced by lower relative density of the sample. A weak ferromagnetic (Mr=0.122 memu/g, Hc=69 Oe) rather than an antiferromagnetic property was observed at RT by magnetic measurement. Significantly, the ME coupling between the electric dipoles and magnetic dipoles at RT was demonstrated by measuring the effect of magnetic and DC electric poling on ferroelectric and magnetic hysteresis loops, respectively. Both Pr and Mr decreased after magnetic and DC electric poling. And the rate of Pr change decreased with increasing measuring electric field.

• Periodical: Advanced Materials Research (Volume 668)
• Pages: 762-766
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.668.762
• Online since: March 2013
• Authors: X.Q. Chen, Xiang Bin Zeng, F.J. Yang, X.P. Kong, C. Wei, P. Su
• Keywords: Ferroelectric Properties, Magnetic Property, Magnetoelectric Coupling, Perovskite

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