Random-field Ising-type transition of pure and doped SBN from the relaxor into the ferroelectric state
Autor(en): | Dec, J Kleemann, W Bobnar, V Kutnjak, Z Levstik, A Pirc, R Pankrath, R |
Stichwörter: | BEHAVIOR; CRITICAL SLOWING-DOWN; DYNAMICS; GLASSY; MODEL; PHASE-TRANSITIONS; Physics; Physics, Multidisciplinary; QUANTUM PARAELECTRIC SRTIO3; SINGLE-CRYSTALS; SR0.61BA0.39NB2O6-CE3+; STRONTIUM-BARIUM NIOBATE | Erscheinungsdatum: | 2001 | Herausgeber: | EDP SCIENCES S A | Journal: | EUROPHYSICS LETTERS | Volumen: | 55 | Ausgabe: | 6 | Startseite: | 781 | Seitenende: | 787 | Zusammenfassung: | Activated critical dynamics and vanishing of the susceptibility ratio alpha (3)=chi (3)/chi (4)(1)-->0 in the zero-frequency limit unequivocally evidence the phase transitions of the uniaxial relaxor crystals SBN, SBN: Ce and SBN: Cr to refer to the three-dimensional random-field Ising universality class. The relaxor-like freezing of polar nanoregions within the precursor regime is successfully described within the framework of the mesoscopic uniaxial spherical random-bond random-field model. |
ISSN: | 02955075 | DOI: | 10.1209/epl/i2001-00348-5 |
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geprüft am 18.05.2024