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Dielectric property studies of multiferroic GaFeO 3

2006; Institute of Physics; Volume: 39; Issue: 12 Linguagem: Inglês

10.1088/0022-3727/39/12/001

1361-6463

Zhihui Sun, Bing Cheng, Songyuan Dai, L Z Cao, Yucheng Zhou, Kexin Jin, Z H Chen, Guomin Yang,

Magnetic and transport properties of perovskites and related materials

Magnetic and dielectric properties of a polycrystalline GaFeO3 sample prepared by a solid-state reaction have been investigated. A ferrimagnetic phase transition TN of the material was identified at a temperature of 225 K. An anomaly on the permittivity as a function of temperature has been observed near its magnetic transition point TN, which could be induced by the magnetoelectric coupling between its electric and magnetic orders. At low temperature, T < TN, the permittivity variation Δε depends on magnetization M and shows clearly a linear relationship between Δε and M2, which indicates that a dielectric and magnetic correlation exists in the compound. Furthermore, its dielectric relaxation process is discussed in the temperature interval of 77–300 K.