Room-temperature paramagnetoelectric effect in magnetoelectric multiferroics Pb(Fe.sub.1/2./sub.Nb.sub.1/2./sub.)O.sub.3./sub. and its solid solution with PbTiO.sub.3./sub.

0469377 - FZÚ 2017 RIV US eng J - Journal Article
Laguta, Valentyn - Morozovska, A. N. - Eliseev, E. A. - Raevski, I. P. - Raevskaya, S. I. - Sitalo, E.I. - Prosandeev, S. A. - Bellaiche, L.
Room-temperature paramagnetoelectric effect in magnetoelectric multiferroics Pb(Fe_1/2Nb_1/2)O₃ and its solid solution with PbTiO₃.
Journal of Materials Science. Roč. 51, č. 11 (2016), s. 5330-5342. ISSN 0022-2461. E-ISSN 1573-4803
R&D Projects: GA ČR GA13-11473S
Institutional support: RVO:68378271
Keywords : multiferroic * antiferromagnetic * ferroelectrics * magnetoelectric effect * Landau theory
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.599, year: 2016

Magnetoelectric response at room temperature and above in high-resistive ceramics made of multiferroic Pb(Fe1/2Nb1/2)O3 (PFN) and PFN-based solid solution 0.91PFN – 0.09PbTiO3 have been observed. The theoretical description of the paramagnetoelectric effect, within the framework of a Landau theory of phase transitions qualitatively reproduces well the temperature dependence of the PME coefficient. In particular, the Landau theory predicts the significant increase of the PME effect at low temperatures and near the temperature of the paraelectric-to-ferroelectric phase transition, since the PME coefficient is equal to the product of the spontaneous polarization, dielectric permittivity, square of magnetic susceptibility and the coefficient quantifying the strength of the biquadratic magnetoelectric coupling.

Permanent Link: http://hdl.handle.net/11104/0267168