High pressure antiferrodistortive phase transition in mixed crystals of EuTiO3 and SrTiO3 (original) (raw)

Abstract

We report a detailed high pressure study on Eu 1-x Sr x TiO 3 polycrystalline samples using synchrotron x-ray diffraction. We have observed a second-order antiferrodistortive phase transition for all doping levels which corresponds to the transition that has been previously explored as a function of temperature. The analysis of the compression mechanism by calculating the lattice parameters, spontaneous strains and tilt angles of the TiO 6 octahedra leads to a high pressure phase diagram for Eu 1-x Sr x TiO 3 .

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