Microscopic origin of the giant ferroelectric polarization in tetragonal-like BiFeO3
Publication Type | Journal Article
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Authors | |
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DOI |
10.1103/PhysRevLett.107.147602
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Abstract |
We report direct experimental evidence for a room-temperature, ∼130μC/cm2 ferroelectric polarization from the tetragonal-like BiFeO 3 phase. The physical origin of this remarkable enhancement of ferroelectric polarization has been investigated by a combination of x-ray absorption spectroscopy, scanning transmission electron microscopy, and first principles calculations. A large strain-induced Fe-ion displacement relative to the oxygen octahedra, combined with the contribution of Bi 6s lone pair electrons, is the mechanism driving the large ferroelectric polarization in this tetragonal-like phase. © 2011 American Physical Society.
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Notes |
cited By 186
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Journal |
Physical Review Letters
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Volume |
107
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Year of Publication |
2011
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Number |
14
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ISSN Number |
00319007
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Keywords | |
Research Areas | |
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