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  4. Relaxors as Superparaelectrics with Distributions of the Local Transition-Temperature
 
research article

Relaxors as Superparaelectrics with Distributions of the Local Transition-Temperature

Glazounov, A. E.
•
Bell, A. J.
•
Tagantsev, A. K.  
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1995
Journal of Physics: Condensed Matter

A model of relaxors as superparaelectrics with a distribution of the local transition temperature has been investigated. The necessary model parameters are obtained from the analysis of the static polarization response of lead magnesium niobate and then employed in simulations of the frequency-dependent dielectric properties. The present model is compared with a previously published model of relaxors, based on a single transition temperature but with a distribution of the size of the polar regions. Both of them describe some characteristic features of relaxors, i.e. the shift of the peaks in temperature dependence of the real and imaginary parts of the dielectric permittivity with frequency and the broadening of the relaxation time spectrum on cooling. However, a model which takes into account the distribution of the size of the polar regions describes qualitatively correctly the shape of the relaxation time spectrum.

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Type
research article
DOI
10.1088/0953-8984/7/21/013
Web of Science ID

WOS:A1995RA00600013

Author(s)
Glazounov, A. E.
•
Bell, A. J.
•
Tagantsev, A. K.  
•
Tagantsev, A. K.  
Date Issued

1995

Published in
Journal of Physics: Condensed Matter
Volume

7

Issue

21

Start page

4145

End page

4168

Subjects

lead magnesium niobate

•

polarization

•

model

•

ferroelectrics

•

pbmg1/3nb2/3o3

Note

Glazounov, Ae Ecole Polytech Fed Lausanne,Ceram Lab,Ch-1015 Lausanne,Switzerland

Ra006

Cited References Count:16

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LC  
Available on Infoscience
August 21, 2006
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/233261
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