Direct Observation of Magnetic-Ion Off-Centering-Induced Ferroelectricity in Multiferroic Manganite Pr(Sr0.1Ca0.9)2Mn2O7

Ferroelectricity in multiferroic Pr(Sr0.1Ca0.9)2Mn2O7 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 tha...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2015-11, Vol.27 (41), p.6328-6332
Main Authors: Ma, Chao, Lin, Yue, Yang, Huaixin, Tian, Huanfang, Shi, Lei, Zeng, Jie, Li, Jianqi
Format: Article
Language:English
Subjects:
manganite
multiferroics
orbital ordering
structural distortions
transmission electron microscopy
Online Access:Get full text
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Summary:Ferroelectricity in multiferroic Pr(Sr0.1Ca0.9)2Mn2O7 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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201502385