0448487 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Mackeviciute, R. - Goian, Veronica - Greicius, S. - Grigalaitis, R. - Nuzhnyy, Dmitry - Holc, J. - Banys, J. - Kamba, Stanislav
Lattice dynamics and broad-band dielectric properties of multiferroic Pb(Fe_1/2Nb_1/2)O₃ ceramics.
Journal of Applied Physics. Roč. 117, č. 8 (2015), "084101-1"-"084101-6". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GAP204/12/1163
Institucionální podpora: RVO:68378271
Klíčová slova: relaxor ferroelectrics * phonons * soft mode
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.101, rok: 2015

Complex dielectric properties of Pb(Fe1/2Nb1/2)O3 ceramics were investigated in a broad frequency range from 100 Hz up to 90 THz. A dielectric relaxation, which appears in THz region below 700 K, slows down towards Tc1 and again hardens below Tc2=356 K. This central mode drives both phase transitions, so they belong to order-disorder type, although the polar phonons exhibit anomalies near both phase transitions.
Trvalý link: http://hdl.handle.net/11104/0250169