a new model of correlated disorder in relaxor ferroelectrics
a new model of correlated disorder in relaxor ferroelectrics
a new model of correlated disorder in relaxor ferroelectrics
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Relaxor-specific component <strong>of</strong> diffuse scatter<strong>in</strong>g (RSDS) should disappear<br />
at high temperature as Pb displacements will become a free un<strong>correlated</strong><br />
movement over the spherical shell<br />
RSDS should disappear under high pressure as Pb ions will be<br />
immobilised <strong>in</strong> the emerg<strong>in</strong>g local m<strong>in</strong>ima on the sphere<br />
RSDS should deform <strong>in</strong> an applied electric field as Pb ions as additional<br />
anisotropy will be created over the displacement shell; features<br />
perpendicular to the field direction should shr<strong>in</strong>k<br />
The naturally created hierarchy <strong>of</strong> displacement patterns <strong>in</strong> space and<br />
their respective lifetimes should result <strong>in</strong> the large spread <strong>of</strong> relaxation<br />
times<br />
The uniform slow fad<strong>in</strong>g <strong>of</strong> polarization <strong>in</strong> switched doma<strong>in</strong> without wall<br />
movement is also <strong>in</strong> l<strong>in</strong>e with our concept.<br />
J. Kreisel, P. Bouvier, B. Dkhil, B. Chaabane, A. Glazer, P. Thomas, T. Welberry, Ferroelectrics<br />
302, 293 (2004)
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