Abstract
The principal bond distances in the structure of tetragonal PbMg1/3Nb2/3O3-PbTiO3 (PMN-PT) solid solutions have been determined by the Rietveld method. The ferroelectric state of (PbMg1/3Nb2/3O3)0.62(PbTiO3)0.38 samples is shown to be governed by the displacement of the Pb ions from their ideal crystallographic site. In the frequency range 4000–5000 cm−1, the refractive index of the samples is 2.70–2.75, as determined by the Kramers-Kronig method.
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