Pressure-Temperature phase diagram of multiferroic EuTiO${}_3$

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.

References in corpus (4)

• Magnetodielectric effect and optic soft mode behaviour in quantum paraelectric EuTiO3 ceramics
• Emergence of a Dynamic Super-Structural Order Integrating Antiferroelectric and Antiferrodistortive Competing Instabilities in EuTiO3
• First-principles prediction of oxygen octahedral rotations in perovskite-structure EuTiO3
• Nonlinear pressure dependence of T_N in almost multiferroic EuTiO_3

Cited by in corpus (3)

• Hidden fluctuations close to a quantum bicritical point
• Size-Dependent Structural Phase Transitions in SrTiO3 Nanoparticles
• Magnetic interactions and the puzzling absence of any Raman mode in EuTiO3