Anomalous pressure dependence of the atomic displacements in the relaxor ferroelectric PbMg${}_{1/3}$Ta${}_{2/3}$O${}_3$

S. N. Gvasaliya, V. Pomjakushin, B. Roessli +3

The crystal structure of the PbMg${}_{1/3}$Ta${}_{2/3}$O${}_3$ (PMT) relaxor ferroelectric was studied under hydrostatic pressure up to $\sim 7$ GPa by means of powder neutron diffractio…