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

doi:10.1063/1.2905815

Substantial magneto-electric coupling near room temperature in Bi2Fe4O9

Materials Science 2009-11-13 v1 Strongly Correlated Electrons

Authors: A. K. Singh , S. D. Kaushik , Brijesh Kumar , A. Venimadhav , P. K. Mishra , V. Siriguri , S. Patnaik

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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.

Keywords

magnetic structure multiferroic phase transitions

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@article{arxiv.0803.1539,
  title  = {Substantial magneto-electric coupling near room temperature in Bi2Fe4O9},
  author = {A. K. Singh and S. D. Kaushik and Brijesh Kumar and A. Venimadhav and P. K. Mishra and V. Siriguri and S. Patnaik},
  journal= {arXiv preprint arXiv:0803.1539},
  year   = {2009}
}

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10 pages, 4 figures

Substantial magneto-electric coupling near room temperature in Bi2Fe4O9

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