Dielectric and polarization studies of magnetoelectric coupling in non-relaxor Pb(Fe.sub.1/2./sub.Ta.sub.1/2./sub.)O.sub.3./sub. multiferroic ceramics

0474905 - FZÚ 2018 RIV GB eng J - Journal Article
Savinov, Maxim - Bednyakov, Petr - Raevskaya, S. I. - Gusev, A.A. - Isupov, V.P. - Raevski, I. P. - Titov, V.V. - Chen, H. - Kovrigina, S.A. - Chou, C.-C. - Minasyan, T.A. - Malitskaya, M. A.
Dielectric and polarization studies of magnetoelectric coupling in non-relaxor Pb(Fe_1/2Ta_1/2)O₃ multiferroic ceramics.
Ferroelectrics. Roč. 509, č. 1 (2017), s. 80-91. ISSN 0015-0193. E-ISSN 1563-5112
Institutional support: RVO:68378271
Keywords : lead iron tantalate * PFT * dielectric permittivity * phase transition * hysteresis loops * magnetoelectric coupling
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 0.728, year: 2017

Dielectric permittivity ϵ and polarization / electric field hysteresis loops of highly-resistive Li-doped non-relaxor Pb(Fe1/2Ta1/2)O3 ceramics obtained by one-step sintering of the mechanically activated mixture of starting oxides and Li2CO3 have been studied. Antiferromagnetic phase transition temperature TN ≈ 150 K was determined using Mossbauer spectroscopy studies at different temperatures. Though no anomalies in ϵ(T) curve at TN were observed, 1/ϵ(T) dependence exhibits change of the slope in the vicinity of TN. Anomalies in the temperature dependences of coercive field EC and derivative of the spontaneous polarization PS are observed near TN as well. These anomalies are attributed to magnetoelectric coupling.
Permanent Link: http://hdl.handle.net/11104/0271816