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Dielectric properties on charge ordered ferroelectrics LuFe$$_{2}$$O$$_{4}$$

Ikeda, Naoshi*; Kambe, Takashi*; Komatsu, Takuma*; Michiuchi, Takamasa*; Hayakawa, Hironori*; Hanasaki, Noriaki*; Yoshii, Kenji  ; Matsuo, Yoji*; Mori, Shigeo*

A review will be given on the new type of ferroelectric material LuFe$$_{2}$$O$$_{4}$$. This oxide becomes ferroelectric below about 330 K, owing to the charge-ordered arrangement of Fe ions on a triangular lattice: This is a novel mechanism of ferroelectricity. We discuss the experimental results obtained from resonant X-ray diffraction, dielectric response, polarization and magnetization to show some interesting properties of this new ferroelectric oxide.



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