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 - Článek v odborném periodiku
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
Grant CEP: GA ČR GA13-11473S
Institucionální podpora: RVO:68378271
Klíčová slova: multiferroic * antiferromagnetic * ferroelectrics * magnetoelectric effect * Landau theory
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.599, rok: 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.

Trvalý link: http://hdl.handle.net/11104/0267168