The structural transformation of multiferroic EuTiO3 has been intensively investigated by synchrotron x-ray diffraction at pressures up to 50.3 GPa and temperatures from 50 to 500 K. An antiferrodistortive phase transition from cubic Pm-3m to tetragonal I4/mcm space group has been observed, identical to the one that has been previously explored at ambient pressure and low temperatures. Several compression/decompression cycles at different temperatures have been carried out to accurately map the transition, and as a result a P-T phase diagram for EuTiO3 has been constructed. The observed phase transition exhibits many similarities with isostructural SrTiO3, although the absence of magnetoelectric interactions in the latter accounts for the different phase boundaries between the two materials.
@article{arxiv.1505.05049,
title = {Pressure-Temperature phase diagram of multiferroic EuTiO$_3$},
author = {P. Parisiades and E. Liarokapis and J. Köhler and A. Bussmann-Holder and M. Mezouar},
journal= {arXiv preprint arXiv:1505.05049},
year = {2015}
}