High pressure antiferrodistortive phase transition in mixed crystals of EuTiO3 and SrTiO3

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Abstract

We report a detailed high pressure study on Eu1-xSrxTiO3 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 TiO6 octahedra leads to a high pressure phase diagram for Eu1-xSrxTiO3.

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Parisiades, P., Saltarelli, F., Liarokapis, E., Köhler, J., & Bussmann-Holder, A. (2016). High pressure antiferrodistortive phase transition in mixed crystals of EuTiO3 and SrTiO3. AIP Advances, 6(6). https://doi.org/10.1063/1.4954819

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