Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3

Details Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3 Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3

2011-01-20

arxiv.org/abs/1101.3873v1

Physics

Condensed Matter

Materials Science

7 pages, 7 figures

Scientific paper

The results of diffuse neutron scattering experiment on PbMg1/3Nb2/3O3 single crystal above the Burns temperature are reported. It is shown that the high temperature elastic diffuse component is highly anisotropic in low-symmetry Brillouin zones and this anisotropy can be described using Huang scattering formalism assuming that the scattering originates from mesoscopic lattice deformations due to elastic defects. The qualitative agreement between this model and the experimental data is achieved with simple isotropic defects. It is demonstrated that weak satellite maxima near the Bragg reflections can be interpreted as the finite resolution effect.

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