Pressure Induced Phase Transition in PbTiO3 Studied by X-ray Absorption Spectroscopy at the Ti K edge

Journal Article · Fri Jan 19 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2436425· OSTI ID:21043375

Dhaussy, A C; Marinel, S; Veres, A ^[1]; Jaouen, N ^[2]; Itie, J P ^[3]; Rogalev, A ^[2]

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1. CRISMAT, ENSICAEN, Bd Mal Juin, 14050 Caen (France)
2. European Synchrotron Radiation Facility, rue J. Horowitz, 38043 Grenoble (France)
3. Synchrotron SOLEIL, l'Orme des merisiers 91192 Gif-sur-Yvette (France)

The Ti-K edge X-ray Absorption Near Edge Structure (XANES) for CaTiO3 and PbTiO3 have been measured under high pressure in a diamond anvil cell at room temperature. Despite the huge absorption from the diamond cell and the sample high quality XANES allows us to observe that in CaTiO3 no change occurs when applying pressure, at the opposite of PbTiO3 in which the pre-edge features vary strongly. It allows studying the phase transition from ferroelectric to paraelectric phase in PbTiO3 from the local point of view. Under pressure the change in intensity of the pre-edge indicates qualitatively that the Ti atom is moving toward the centre of the oxygen octahedron along the c-axis.

• OSTI ID: 21043375
• Journal Information: AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436425; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
CALCIUM COMPOUNDS
DIAMONDS
FERROELECTRIC MATERIALS
LEAD COMPOUNDS
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
TITANATES
TITANIUM
X RADIATION
X-RAY SPECTROSCOPY