Artículos de revistas
Structure factor of a relaxor ferroelectric
Fecha
2015-04-14Registro en:
2469-9950
2469-9969
10.1103/PhysRevB.91.144105
816-B5-220
DE-AC02-06CH11357
Autor
Guzmán Verri, Gian Giacomo
Varma, Chandra M.
Institución
Resumen
We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure ferroelectrics together with quenched disorder coupled linearly to the critical modes. We present the simplest approximate solution of the model necessary to obtain the principal features of the correlation functions. Specifically, we calculate and compare the structure factor measured by neutron scattering in different characteristic regimes of temperature in the relaxor PbMg1/3Nb2/3O3.