Random-field model of

L. Zhang; W.-L. Zhong; W. Kleemann

doi:10.1209/epl/i2001-00150-y

All issues

Volume 53 / No 3 (February 2001)

Europhys. Lett., 53 3 (2001) 401-406

Abstract

Issue		Europhys. Lett. Volume 53, Number 3, February 2001


Page(s)		401 - 406
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2001-00150-y
Published online		01 December 2003

Europhys. Lett., 53 (3), pp. 401-406 (2001)

Random-field model of $\rm Ca_{\beta} Sr_{1-\beta}TiO_3$

L. Zhang¹, W.-L. Zhong¹ and W. Kleemann²

¹ Department of Physics, Shandong University - Jinan, 250100, PRC
² Laboratorium für Angewandte Physik, Gerhard Mercator Universität Duisburg D-47048 Duisburg, Germany

Received: 3 July 2000
Accepted: 23 November 2000

Abstract

The mechanism of the dielectric response in $\rm Ca_{\beta} Sr_{1-\beta } TiO_{3}$ is explained according to the transverse-field Ising model. The impurity-polarized cluster induces the appearance of ferroelectric domain states. The random field leads to the diffusion of the dielectric response. Our model is in good agreement with the experimental result.

PACS: 77.22.Ej – Polarization and depolarization / 77.80.Bh – Phase transitions and Curie point

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