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Crossover between Ferroelectric and Quantum Paraelectric in SrTiO3 both by Isotopic Substitution and Hydrostatic Pressure

Published online by Cambridge University Press:  01 February 2011

Ruiping Wang  and
Mitsuru Itoh
Ruiping Wang
Affiliation:
Smart Structure Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, 1-1-1, Umezono, Tsukuba, 305-8568, Japan
Mitsuru Itoh
Affiliation:
Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
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Abstract

Quantum paraelectric SrTiO3 undergoes a transition to ferroelectric by the substitution of 18O for 16O. The Tc vs. x in SrTi(16O1-x18Ox)3 follows Tc = 30.4(x - 0.33)1/2. Application of the hydrostatic pressure on the SrTiO3 and SrTi(16O0.0718O0.93)3 have the effects of decreasing ε and depressing Tc, respectively. Above the critical pressure pc, ferroelectricity of SrTi(16O0.0718O0.93)3 disappears. Fitting the data to the Barrett's formula, ε , elucidated that T0 and T1 for both compounds changes linearly with pressure.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D8.8
Copyright
Copyright © Materials Research Society 2002

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