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arXiv · 1505.05049

Pressure-Temperature phase diagram of multiferroic EuTiO$_3$

P. Parisiades·E. Liarokapis·J. Köhler·A. Bussmann-Holder·M. Mezouar
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Abstract

The structural transformation of multiferroic EuTiO$_3$ 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 EuTiO$_3$ has been constructed. The observed phase transition exhibits many similarities with isostructural SrTiO$_3$, although the absence of magnetoelectric interactions in the latter accounts for the different phase boundaries between the two materials.

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P. Parisiades, E. Liarokapis, J. Köhler, A. Bussmann-Holder, M. Mezouar. 2015-05-19. Pressure-Temperature phase diagram of multiferroic EuTiO$_3$. https://doi.org/10.1103/physrevb.92.064102

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