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Advanced Ferroelectricity$
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Robert Blinc

Print publication date: 2011

Print ISBN-13: 9780199570942

Published to Oxford Scholarship Online: January 2012

DOI: 10.1093/acprof:oso/9780199570942.001.0001

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Dipolar glasses

Dipolar glasses

Chapter:
(p.95) 4 Dipolar glasses
Source:
Advanced Ferroelectricity
Author(s):

Robert Blinc

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199570942.003.0004

The physics of dipolar glasses is briefly discussed. It is shown that the local dipolar structure can be characterized by a local polarization distribution function and not by the homogeneous polarization as in classical ferroelectrics. The glassy structure is determined by the Edwards–Anderson order parameter. The dielectric properties and NMR characteristics of dipolar glasses and inhomogeneous ferroelectrics are presented. The difference between the field‐cooled and zero‐field‐cooled dielectric constant is stressed. It is also shown that the local polarization distribution function and the Edwards–Anderson order parameter can be determined by NMR. The random‐bond–random‐field Ising model theory of dipolar glasses is presented.

Keywords:   properties of dipolar glasses, field‐cooled, zero‐field‐cooled, dielectric constant of glasses, local polarization distribution function, Edwards–Anderson order parameter, dipolar glasses

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