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Phase transitions in BaTiO3: a high-pressure neutron diffraction study
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Stuart A. Hayward
Published/Copyright:
September 25, 2009
Abstract
The sequence of ferroelectric phase transitions (Pm3̅m—P4mm—Amm2) in BaTiO3 has been studied as a function of temperature (298 K–130 K) at a fixed pressure (3.2 GPa). The same sequence of transitions is observed as for ambient pressures, but the transition temperatures are reduced. The spontaneous strains of the non-cubic phases are determined. Whilst the structure of the tetragonal phase at high pressure is qualitatively similar to the ambient structure, both the spontaneous strain and the Ti displacement are smaller in the high pressure structure than the ambient structure.
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Published Online: 2009-9-25
Published in Print: 2005-8-1
© by Oldenbourg Wissenschaftsverlag, München
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- Phase Transitions
- Structural phase transitions in two-dimensional systems: Pb/Ge(111) and Sn/Ge(111)
- Theoretical approach to reconstructive and morphotropic phase transitions
- Surface relaxations at mineral surfaces
- Methods for pseudosymmetry evaluation: a comparison between the atomic displacements and electron density approaches
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