Detail publikace

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

KAMBA, S. NUZHNYY, D. VANĚK, P. SAVINOV, M. KNÍŽEK, K. SHEN, Z. ŠANTAVÁ, E. MACA, K. SADOWSKI, M. PETZELT, J.

Originální název

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

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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 a magnetic field dependence of the permittivity, also slightly smaller than in single crystal. An 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.

Klíčová slova

Magnetomechanical and magnetoelectric effects, Magnetostriction, Infrared and Raman spectra, Phonons in crystal lattices

Autoři

KAMBA, S.; NUZHNYY, D.; VANĚK, P.; SAVINOV, M.; KNÍŽEK, K.; SHEN, Z.; ŠANTAVÁ, E.; MACA, K.; SADOWSKI, M.; PETZELT, J.

Rok RIV

2007

Vydáno

1. 10. 2007

Nakladatel

EDP SCIENCES S A

Místo

17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE

ISSN

0295-5075

Periodikum

EUROPHYSICS LETTERS

Ročník

80

Číslo

2

Stát

Spojené království Velké Británie a Severního Irska

Strany od

27002-p1

Strany do

27002-p6

Strany počet

6