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Title: Dalibor Repček: Magnetoelectric behaviour of EuTiO3 ceramics
Number: 20/21
Status: Closing date exceeded
Begin: Wednesday, 28.04. 2021, 14:10
Tutor: Ross H. Colman & Vladimír Sechovský
Location: ZOOM Meeting ID: 958 0426 7376


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We have a pleasure to invite you to attend the joint seminar
of the Department of Condensed Matter Physics (DCMP)
and the Materials Growth and Measurement Laboratory (MGML) http://mgml.eu.

 

Program

 

Magnetoelectric behaviour of EuTiO3 ceramics

lecture given by:

Dalibor Repček

Institute of Physics of the Czech Academy of Sciences, Prague

 

https://cesnet.zoom.us/j/95804267376
Meeting ID: 958 0426 7376 

on Wednesday, 28.4. 2021 from 14:10 CET (12.10 UTC) 

Passcode will be provided on request at  This e-mail address is being protected from spambots. You need JavaScript enabled to view it

 

Ross H. Colman & Vladimír Sechovský
On behalf of the DCMP and MGML


Abstract 

EuTiO3 is an incipient ferroelectric antiferromagnet attracting attention of multiferroic community for several reasons. First, due to its unusually strong non-linear, third order (E2H2-type) magnetoelectric coupling, which is demonstrated via a magnetodielectric (spin-phonon coupling) effect below Néel temperature of about 5 K. Second, because of the possible induction of ferroelectricity at low temperatures bybiaxial strain or barium doping. Thus, induced multiferroic system could exhibit interesting magnetoelectric coupling. Moreover, its affinity with SrTiO3 and BaTiO3 predetermine these compounds to form (Eu, Ba, Sr)TiO3 solid-state solution with remarkable properties. One of them ispossible existence of multiferroic quantum criticalities causing an unconventional temperature dependence of low-temperature electric and magnetic susceptibility.

Apart from the overview of basic properties of EuTiO3, the lecture is focused on theseemingly anisotropic behaviour of the magnetodielectric effect[1], observation of the ferromagnetic resonance shift from microwave to THz region with external magnetic field[1], and discussion of preliminary results concerning the multiferroic quantum critical behaviour in (Eu, Ba, Sr)TiO3 solid solutions[2].

References:

[1] D. Repček, et. al., Physical Review B 102, 144402 (2020).
[2] A. Narayan, A. Cano, A. V. Balatsky, and N. A. Spaldin, Nature Materials 18, 223 (2019).