Iso‐Structural Phase Transitions in BiFeO 3 | Zendy

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Iso‐Structural Phase Transitions in BiFeO 3

Author(s) -

Scott James F.

Publication year - 2010

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.200904229

Subject(s) - materials science , bismuth ferrite , phase transition , bismuth , condensed matter physics , lattice (music) , lattice constant , polarization (electrochemistry) , dielectric , ferroelectricity , multiferroics , optics , metallurgy , chemistry , optoelectronics , diffraction , physics , acoustics

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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