Interaction between quantum paraelectricity and ferroelasticity in SrTiO3

Hayward, S. A. and Morrison, F. D. and Scott, J. F. (2005) Interaction between quantum paraelectricity and ferroelasticity in SrTiO3. Journal of Physics: Condensed Matter, 17 (43). pp. 7009-7022. DOI 10.1088/0953-8984/17/43/018

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Abstract

The dielectric susceptibility of SrTiO3 is measured as a function of temperature between room temperature and 32 K. These data show an anomaly at approximately 105 K, which is associated with the cubic-tetragonal ferroelastic phase transition. The form of this anomaly is shown to be consistent with biquadratic coupling between the ferroelectric and ferroelastic modes. The quantum paraelectric state of SrTiO3 is studied in the framework of a quantum mechanical Landau potential. The saturation temperature is determined from published measurements of the dielectric susceptibility at very low temperatures. When the coupling to the ferroelastic mode is accounted for, the saturation temperature obtained from these measurements (θS = 20(1) K) is the same as that seen in phase diagrams for the ferroelectric transition, such as TC versus chemical dopant or O isotope content.

Item Type: Article
Uncontrolled Keywords: 2005 AREP 2005 P IA49
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Journal of Physics: Condensed Matter
Volume: 17
Page Range: pp. 7009-7022
Identification Number: 10.1088/0953-8984/17/43/018
Depositing User: Sarah Humbert
Date Deposited: 30 Mar 2011 15:21
Last Modified: 23 Jul 2013 09:58
URI: http://eprints.esc.cam.ac.uk/id/eprint/1674

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