TY - JOUR
T1 - Characteristic temperatures of PbFe1/2Nb1/2O3 ferroelectrics crystals seen via acoustic emission
AU - Dul'Kin, E.
AU - Kania, A.
AU - Roth, M.
N1 - Publisher Copyright:
© 2014 IOP Publishing Ltd.
PY - 2014/3
Y1 - 2014/3
N2 - PbFe1/2Nb1/2O3 ferroelectrics crystals have been investigated using an acoustic emission. All the characteristic points have been detected: the Néel antiferromagnetic-paramagnetic phase transition at 158.6 K, both the rhombohedral-tetragonal at 363-348 K and tetragonal-cubic at 382-365 K structural phase transitions, the intermediate temperature T at 431-427.5 K and the Burns temperature Td, extending through 564-603 K. It is shown that a dielectric response is unable to locate the Td correctly, but both the thermal expansion and acoustic emission are able. Acoustic emission is found to be more powerful for T than for Td, which is usually observed in some well known relaxor ferroelectrics. Such a phenomenon is discussed from a viewpoint of dynamics of polar nanoregions.
AB - PbFe1/2Nb1/2O3 ferroelectrics crystals have been investigated using an acoustic emission. All the characteristic points have been detected: the Néel antiferromagnetic-paramagnetic phase transition at 158.6 K, both the rhombohedral-tetragonal at 363-348 K and tetragonal-cubic at 382-365 K structural phase transitions, the intermediate temperature T at 431-427.5 K and the Burns temperature Td, extending through 564-603 K. It is shown that a dielectric response is unable to locate the Td correctly, but both the thermal expansion and acoustic emission are able. Acoustic emission is found to be more powerful for T than for Td, which is usually observed in some well known relaxor ferroelectrics. Such a phenomenon is discussed from a viewpoint of dynamics of polar nanoregions.
KW - Acoustic emission
KW - Burns temperature
KW - Intermediate temperature
KW - Phase transitions
KW - Relaxor ferroelectrics
UR - http://www.scopus.com/inward/record.url?scp=84940598734&partnerID=8YFLogxK
U2 - 10.1088/2053-1591/1/1/016105
DO - 10.1088/2053-1591/1/1/016105
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AN - SCOPUS:84940598734
SN - 2053-1591
VL - 1
JO - Materials Research Express
JF - Materials Research Express
IS - 1
M1 - 016105
ER -