Direct Observation of Magnetic-Ion Off-Centering-Induced Ferroelectricity in Multiferroic Manganite Pr(Sr sub(0.1)Ca sub(0.9)) sub(2)Mn sub(2)O sub(7)

Ferroelectricity in multiferroic Pr(Sr sub(0.1)Ca sub(0.9)) sub(2)Mn sub(2)O sub(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 tilti...

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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:
Deformation
Displacements (lattice)
Ferroelectricity
Lattices
Magnetism
Manganese
Manganites
Orbitals
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Summary:Ferroelectricity in multiferroic Pr(Sr sub(0.1)Ca sub(0.9)) sub(2)Mn sub(2)O sub(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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201502385