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Direct Observation of Magnetic‐Ion Off‐Centering‐Induced Ferroelectricity in Multiferroic Manganite Pr(Sr 0.1 Ca 0.9 ) 2 Mn 2 O 7
Author(s) -
Ma Chao,
Lin Yue,
Yang Huaixin,
Tian Huanfang,
Shi Lei,
Zeng Jie,
Li Jianqi
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201502385
Subject(s) - manganite , multiferroics , materials science , ferroelectricity , ion , nuclear magnetic resonance , manganese , condensed matter physics , ferromagnetism , analytical chemistry (journal) , optoelectronics , physics , dielectric , metallurgy , chemistry , chromatography , quantum mechanics
Ferroelectricity in multiferroic Pr(Sr 0.1 Ca 0.9 ) 2 Mn 2 O 7 is found to originate from the off‐centering of Mn ions. This polar displacement is energetically stabilized by the cooperative interplay of lattice deformation induced by orbital ordering and oxygen octahedral tilting. This mechanism implies that magnetism and ferroelectricity arise from the same magnetic ions, providing direct evidence for the magnetic‐ion off‐centering‐driven ferroelectricity.