Evolution of structure of PbMg1/3Nb2/3O3 in the vicinity of the Burns temperature

The probability density function (PDF) for the lead ion in PbMg1 /3Nb2/3O3 crystal was calculated in the frame of the spherical layer model using earlier published experimental data. Temperature evolution of the radial part of the PDF rho(R) is analyzed in the temperature region 293-900 K. It is dem...

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Main Authors: Vakhrushev, S B, Okuneva, N M
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Okuneva, N M
description The probability density function (PDF) for the lead ion in PbMg1 /3Nb2/3O3 crystal was calculated in the frame of the spherical layer model using earlier published experimental data. Temperature evolution of the radial part of the PDF rho(R) is analyzed in the temperature region 293-900 K. It is demonstrated that on cooling rho(R) becomes nongaussian and at the Burns temperature Td 635 K double-maximum curve is formed. Below Td, the positions of the maxima follow the power law Rmax = (635 - T) exp 0.31. (Author)
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title Evolution of structure of PbMg1/3Nb2/3O3 in the vicinity of the Burns temperature
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