日本結晶学会誌
Online ISSN : 1884-5576
Print ISSN : 0369-4585
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希土類-鉄酸化物RFe2O4の示す新規な強誘電性(R=Y, Ho-Lu)
吉井 賢資池田 直松尾 祥史森 茂生
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2009 年 51 巻 2 号 p. 162-168

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The rare-earth iron oxides RFe2O4 (R = Y, Ho-Lu) have a rhombohedral crystal structure, consisting of an alternating stacking of triangular lattices of R, Fe and O ions. Recently, we have proposed that this system shows a new mechanism of ferroelectricity ; the ferroelectric state originates from a polar charge-ordered structure of Fe2+ and Fe3+ on a triangular lattice. In this article, a review is given on the details of this ferroelectricity, which were revealed by measurements of synchrotron X-ray diffraction and dielectric properties of one of the RFe2O4 oxides, LuFe2O4.

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© 2009 日本結晶学会
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