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Iso-Structural Phase Transitions in BiFeO3

✍ Scribed by James F. Scott

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 89 KB
Volume: 22
Category: Article
ISSN: 0935-9648
DOI: 10.1002/adma.200904229

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✦ Synopsis

This essay discusses recent work on bismuth ferrite, which reveals theoretically and experimentally a phase transition under stress that does not change symmetry but changes the c/a lattice constant ratio. As shown by Ishibashi, such transitions must be discontinuous and are described by free energies eighth‐order in polarization P. Such a predicted two‐step change in P is also known in potassium nitrate films.

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