0308461 - FZÚ 2008 RIV US eng J - Journal Article
Dul´kin, E. - Mojaev, E. - Roth, M. - Kamba, Stanislav - Vilarinho, P. M.
Burns, Neel, and structural phase transitions in multiferroic Pb(Fe_2/3W_1/3)O₃ -xPbTiO₃ detected by an acoustic emission.
[Burnsova, Neelova teplota a strukturní fázové přechody v multiferoickém Pb(Fe_2/3W_1/3)O₃ -xPbTiO₃ detekované akustickou emisí.]
Journal of Applied Physics. Roč. 103, č. 8 (2008), 083542/1-083542/5. ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA ČR(CZ) GA202/06/0403
Institutional research plan: CEZ:AV0Z10100520
Keywords : magnetoelectric multiferroics * phase transitions * acoustic emission * dielectric spectroscopy
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.201, year: 2008 ; AIS: 0.945, rok: 2008
DOI: https://doi.org/10.1063/1.2907969

We investigated the ceramics samples of multiferoic solid solution of relaxor ferroelectric Pb(Fe_2/3W_1/3)O₃ with ferroelectric PbTiO₃ (abbreviated PFW-xPT; x = 0, 0.25 and 0.37) by means of acoustic emission (AE) method and simultaneously using the dielectric measurement below 700 K. A distinct AE response have been detected at Burns temperature Td ≈ 640÷650 K, where the dynamic polar clusters start to appear, at intermediate temperature 510÷520 K, where the polar clusters become probably static, at ferroelectric phase transition temperatures Tc, and at Néel antiferromagnetic phase transitions. The Néel temperatures TN in ceramics were observed lower than in the crystals, the origin is discussed.

Kombinací dielektrické spektroskopie a měřením akustické emise jsme byli schopni detekovat teplotu vzniku polárních klastrů, magnetické i strukturní fázové přechody v multiferoickém PbFe_2/3W_1/3-PbTiO₃ .
Permanent Link: http://hdl.handle.net/11104/0160940