Magnetodielectric effect and optic soft mode behaviour in quantum paraelectric EuTiO3 ceramics

Abstract

Infrared reflectivity and time-domain terahertz transmission spectra of EuTiO3 ceramics revealed a polar optic phonon at 6 - 300K, whose softening is fully responsible for the recently observed quantum paraelectric behaviour. Even if our EuTiO3 ceramics show lower permittivity than the single crystal due to a reduced density and/or small amount of secondary pyrochlore Eu2Ti2O7 phase, we confirmed the magnetic field dependence of the permittivity, also slightly smaller than in single crystal. Attempt to reveal the soft phonon dependence at 1.8K on the magnetic field up to 13T remained below the accuracy of our infrared reflectivity experiment.

References in corpus (3)

• Magnetic and electric phase control in epitaxial EuTiO${}_3$ from first principles
• Infrared and THz studies of polar phonons and improper magnetodielectric effect in multiferroic BFO3 ceramics
• Magnetic influence on the frequency of the soft-phonon mode in the incipient ferroelectric EuTiO3

Cited by in corpus (25)

• Analogies of structural instabilities in EuTiO3 and SrTiO3
• First-principles design and subsequent synthesis of a material to search for the permanent electric dipole moment of the electron
• Antiferrodistortive phase transition in EuTiO3
• Multiferroic Quantum Criticality
• 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
• Origin of giant spin-lattice coupling and the suppression of ferroelectricity in EuTiO3 from first principles
• Phonon Softening and Dispersion in EuTiO3
• Far infrared and terahertz spectroscopy of ferroelectric soft modes in thin films: A review
• Tuning the structural instability of SrTiO_3 by Eu doping: The phase diagram of Sr_1-xEu_xTiO_3
• Magnetic field enhanced structural instability in EuTiO_{3}
• Incipient geometric lattice instability of cubic fluoroperovskites
• Hybrid paramagnon phonon modes at elevated temperatures in EuTiO3
• Spin-lattice coupling induced weak dynamical magnetism in EuTiO_3 at high temperatures
• Spin resonance in EuTiO3 probed by time-domain GHz ellipsometry
• Magnetodielectric coupling and phonon properties of compressively strained EuTiO3 thin films deposited on LSAT
• Effect of phonon anharmonicity on ferroelectricity in EuxBa1-xTiO3
• Ferroelectric order versus metallicity in Sr${}_{1-x}$Ca${}_x$TiO${}_{3-\delta }$ ($x=0.009$)
• 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
• Pressure-Temperature phase diagram of multiferroic EuTiO${}_3$
• Magnetic field driven novel phase transitions in EuTiO${}_3$
• Magnetic interactions and the puzzling absence of any Raman mode in EuTiO3
• Crystal-Field--Driven Magnetoelectricity in the Triangular Quantum Magnet CeMgAl${}_{11}$O${}_{19}$
• Magnetic resonance study of bulk and thin film EuTiO3