Substantial magneto-electric coupling near room temperature in Bi2Fe4O9
A. K. Singh, S. D. Kaushik, Brijesh Kumar, A. Venimadhav, P. K., Mishra, V. Siriguri, S. Patnaik
TL;DR
This paper reports significant magneto-electric coupling near room temperature in Bi2Fe4O9, a multiferroic material, demonstrated through structural, magnetic, and dielectric measurements showing strong electric-magnetic interactions.
Contribution
It presents the discovery of substantial magneto-electric coupling in Bi2Fe4O9 near room temperature, highlighting its potential for multiferroic applications.
Findings
Antiferromagnetic transition around 260 K
Inverse S-shape dielectric anomaly near Neel temperature
Dielectric anomalies shift with magnetic field
Abstract
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 260 K. A pronounced inverse S-shape anomaly in the loss tangent of dielectric measurement is observed near the Neel 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.
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