NMR and the spherical random bond–random field model of relaxor ferroelectrics

To determine the nature of the relaxor state and, in particular, to discriminate between a ferroelectric state broken up into nanodomains under the constraint of quenched random fields and a glassy state we have measured the temperature dependences of the nonlinear dielectric susceptibility in zero...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2000-02, Vol.61 (2), p.177-183
Main Authors: Blinc, R, Dolinšek, J, Gregorovič, A, Zalar, B, Filipič, C, Kutnjak, Z, Levstik, A, Pirc, R
Format: Article
Language:English
Subjects:
A. Glasses
D. Dielectric properties
D. Ferroelectricity
D. Nuclear magnetic resonance
D. Phase transitions
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Summary:To determine the nature of the relaxor state and, in particular, to discriminate between a ferroelectric state broken up into nanodomains under the constraint of quenched random fields and a glassy state we have measured the temperature dependences of the nonlinear dielectric susceptibility in zero field as well as the temperature dependence of the local polarization distribution function and the Edwards–Anderson order parameter in PMN single crystal via 93Nb NMR. The experimental results can be quantitatively described by the newly proposed Spherical Random Bond–Random Field model of relaxor ferroelectrics.
ISSN:0022-3697
1879-2553
DOI:10.1016/S0022-3697(99)00279-6