The equation of state of PbTiO3 up to 37 GPa: A synchrotron x-ray powder diffraction study

A. Sani, M. Hanfland, D. Levy

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Abstract

High-pressure synchroton x-ray powder diffraction patterns were collected using ID09 of ESRF (Grenoble, France) for a powder sample of PbTiO3, placed in a diamond anvil cell. The patterns were collected at room temperature using nitrogen (up to 37 GPa) and methanol-ethanol solution (up to 7 GPa) as pressure-transmitting media. The bulk moduli were calculated for the first time using the Vinet equation of state and they were compared to those of isostructural compounds. The trend of the spontaneous polarization as a function of pressure confirms that the ferroelectric-paraelectric phase transition at 11.2 GPa possesses a second-order character.

Original languageEnglish
Pages (from-to)10601-10604
Number of pages4
JournalJournal of Physics Condensed Matter
Volume14
Issue number44 SPEC ISS.
DOIs
StatePublished - 11 Nov 2002
Externally publishedYes

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