Relaxor-like behavior of BaTiO.sub.3./sub. crystals from acoustic emission study

0347909 - FZÚ 2011 RIV US eng J - Journal Article
Dul´kin, E. - Petzelt, Jan - Kamba, Stanislav - Mojaev, E. - Roth, M.
Relaxor-like behavior of BaTiO₃ crystals from acoustic emission study.
Applied Physics Letters. Roč. 97, č. 3 (2010), 032903/1-032903/3. ISSN 0003-6951. E-ISSN 1077-3118
R&D Projects: GA ČR GAP204/10/0616; GA ČR(CZ) GA202/09/0682
Institutional research plan: CEZ:AV0Z10100520
Keywords : relaxor ferroelectrics * acoustic emission * phase transitions
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.820, year: 2010

BaTiO3 crystals were studied by means of the acoustic emission during thermal cycling through 300-700 K range. In addition to pronounced acoustic emission at the ferroelectric phase transition temperature Tc = 400 K, also nucleation of nanoclusters was detected at somewhat smeared Burns temperature Td = 530÷570 K and their local freezing at T* = 506 K. Bias electric field shifts the T* and Tc linearly up, T* more steeply than Tc. Except for its much faster cluster dynamics than that of classical relaxor materials, BaTiO₃ shows many relaxor-like features in its paraelectric phase.
Permanent Link: http://hdl.handle.net/11104/0188574