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Substantial magnetoelectric coupling near room temperature in Bi2Fe4O9

2008; American Institute of Physics; Volume: 92; Issue: 13 Linguagem: Inglês

10.1063/1.2905815

1520-8842

A. K. Singh, S. D. Kaushik, Brijesh Kumar, P. K. Mishra, A. Venimadhav, V. Siruguri, S. Patnaik,

Seismic Waves and Analysis

We report remarkable multiferroic effects in polycrystalline Bi2Fe4O9. High-resolution x-ray diffraction shows that this compound has orthorhombic structure. Magnetic measurements confirm an antiferromagnetic transition around 260K. A pronounced inverse S-shape anomaly in the loss tangent of dielectric measurement is observed near the Néel temperature. This feature shifts with the application of magnetic field. These anomalies are indicative of substantial coupling between the electric and magnetic orders in this compound.