Analogies of structural instabilities in EuTiO3 and SrTiO3

Abstract

Specific heat measurements and theoretical calculations reveal an intimate analogy between EuTiO3 and SrTiO3. For EuTiO3 a hitherto unknown specific heat anomaly is discovered at TA=282(1)K which is analogous to the well known specific heat anomaly of SrTiO3 at TA=105K caused by an antiferrodistortive transition. Since the zone center soft phonon mode observed in both systems can be modeled with the same parameters we ascribe the new 282(1)K instability of EuTiO3 to an antiferrodistortive phase transition. The higher transition temperature of EuTiO3 as compared to SrTiO3 results from spin phonon coupling.

PRB to be published, 12 pages, 3 Figures

References in corpus (3)

• Bifurcation diagram and pattern formation in superconducting wires with electric currents
• Magnetodielectric effect and optic soft mode behaviour in quantum paraelectric EuTiO3 ceramics
• Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering

Cited by in corpus (33)

• Large adiabatic temperature and magnetic entropy changes in EuTiO3
• On the role of intrinsic disorder in the structural phase transition of magnetoelectric EuTiO3
• The polarizability model for ferroelectricity in perovskite oxides
• Antiferrodistortive phase transition in EuTiO3
• 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
• Lattice dynamical analogies and differences between SrTiO3 and EuTiO3 revealed by phonon-dispersion relations and double-well potentials
• Universal emergence of spatially-modulated structures induced by flexo-antiferrodistortive coupling in multiferroics
• Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3
• Phonon Softening and Dispersion in EuTiO3
• Interplay between antiferrodistortive, ferroelectric and superconducting instabilities in Sr_{1-x}Ca_{x}$TiO_{3-δ}
• Tuning the structural instability of SrTiO_3 by Eu doping: The phase diagram of Sr_1-xEu_xTiO_3
• Lattice instabilities in bulk EuTiO3
• Magnetic field enhanced structural instability in EuTiO_{3}
• New multiferroics based on EuxSr1-xTiO3 nanotubes and nanowires
• Structural and magnetic phase transitions in EuTi1-xNbxO3
• Spin-lattice coupling induced weak dynamical magnetism in EuTiO_3 at high temperatures
• Hybrid paramagnon phonon modes at elevated temperatures in EuTiO3
• Structural control of magnetic anisotropy in a strain driven multiferroic EuTiO3 thin film
• Magnetodielectric coupling and phonon properties of compressively strained EuTiO3 thin films deposited on LSAT
• Low-symmetry monoclinic phase stabilized by oxygen octahedra rotations in thin strained EuxSr1-xTiO3 films
• Charge transport in oxygen-deficient EuTiO${}_3$: the emerging picture of dilute metallicity in quantum-paraelectric perovskite oxides
• Nonlinear pressure dependence of T_N in almost multiferroic EuTiO_3
• Magnetoelastic relaxations in EuTiO3
• Defect engineering of magnetic ground state in EuTiO${}_3$ epitaxial thin films
• Rotomagnetic couplings influence on the magnetic properties of antiferrodistortive antiferromagnets
• Pressure-Temperature phase diagram of multiferroic EuTiO${}_3$
• Strain, Young's modulus, and structural transition of EuTiO3 thin films probed by micro-mechanical methods
• Magnetic field driven novel phase transitions in EuTiO${}_3$
• Magnetic interactions and the puzzling absence of any Raman mode in EuTiO3
• Magnetic resonance study of bulk and thin film EuTiO3
• Colossal magnetoresistance over a wide temperature range in Eu0.99La0.01TiO3
• K. Alex Müller: Science between ferroelectricity and superconductivity