Synchrotron X-ray powder diffraction study of a pressure-induced phase transition in ferroelectric PbTiO3

D. Levy; A. Sani

Synchrotron X-ray powder diffraction study of a pressure-induced phase transition in ferroelectric PbTiO₃

D. Levy, A. Sani

University of Turin

Research output: Contribution to journal › Conference article › peer-review

Abstract

The structure of PbTiO₃ has been refined at different pressures up to 25 GPa by Rietveld synchrotron X-ray powder diffraction. The behavior of the unit cell parameters with pressure shows the presence of a reversible tetragonal to cubic phase transition between 11.4 and 12.1 GPa. The spontaneous strain, related to the spontaneous polarization of ferroelectric materials, z^1/2 = (c/a-1)^1/2, indicates the presence of a second order phase transition, with some order disorder character.

Original language	English
Pages (from-to)	539-544
Number of pages	6
Journal	Materials Science Forum
Volume	378-381
Issue number	II
State	Published - 2001
Externally published	Yes
Event	7th European Powder Diffraction Conference - Barcelona, Spain Duration: 20 May 2000 → 23 May 2000

Keywords

High pressure
Perovskite
Phase transition

Cite this

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abstract = "The structure of PbTiO3 has been refined at different pressures up to 25 GPa by Rietveld synchrotron X-ray powder diffraction. The behavior of the unit cell parameters with pressure shows the presence of a reversible tetragonal to cubic phase transition between 11.4 and 12.1 GPa. The spontaneous strain, related to the spontaneous polarization of ferroelectric materials, z1/2 = (c/a-1)1/2, indicates the presence of a second order phase transition, with some order disorder character.",

keywords = "High pressure, Perovskite, Phase transition",

author = "D. Levy and A. Sani",

year = "2001",

language = "אנגלית",

volume = "378-381",

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journal = "Materials Science Forum",

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AU - Levy, D.

AU - Sani, A.

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AB - The structure of PbTiO3 has been refined at different pressures up to 25 GPa by Rietveld synchrotron X-ray powder diffraction. The behavior of the unit cell parameters with pressure shows the presence of a reversible tetragonal to cubic phase transition between 11.4 and 12.1 GPa. The spontaneous strain, related to the spontaneous polarization of ferroelectric materials, z1/2 = (c/a-1)1/2, indicates the presence of a second order phase transition, with some order disorder character.

KW - High pressure

KW - Perovskite

KW - Phase transition

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SN - 0255-5476

VL - 378-381

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EP - 544

JO - Materials Science Forum

JF - Materials Science Forum

IS - II

T2 - 7th European Powder Diffraction Conference

Y2 - 20 May 2000 through 23 May 2000

ER -

Synchrotron X-ray powder diffraction study of a pressure-induced phase transition in ferroelectric PbTiO₃

Abstract

Keywords

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