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Electronic ferroelectricity, charge ordering and structural phase transitions in LuFe 2 O 4 (LuFeO 3 ) n ( n = 0 and 1)
Author(s) -
Yang Huaixin,
Zhang Ying,
Qin Yuanbin,
Ma Chao,
Tian Huanfan,
Li Jianqi
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200945390
Subject(s) - ferroelectricity , multiferroics , materials science , dielectric , condensed matter physics , phase transition , charge ordering , polarization (electrochemistry) , electric field , hysteresis , crystallography , charge (physics) , chemistry , physics , optoelectronics , quantum mechanics
The nature of the charge order, multiferroic features, and structural phase transitions in LuFe 2 O 4 (LuFeO 3 ) n ( n = 0 and 1) materials have been extensively investigated. In situ transmission electron microscopy (TEM) investigations on LuFe 2 O 4 ( n = 0) show the presence of well‐defined charge‐ordered states at low temperatures that could give rise to a notable ferroelectric polarization. Measurements of the structural and physical properties on LuFe 2 O 4 (LuFeO 3 ) n ( n = 1) demonstrate that the intercalation of the LuFeO 3 ‐block could lead to visible changes in the dielectric properties and the charge ordering (CO) features. Measurements of ferroelectric properties suggest that Mn substitution for Fe in Lu 2 Fe 2 Fe 1– x Mn x O 7 (0 < x ≤ 0.86) can notably suppress the conducting leakage current and results in clear hysteresis loops in the polarization–electric field switching curves.