Characteristic temperatures of PbFe1/2Nb1/2O3 ferroelectrics crystals seen via acoustic emission

E. Dul'Kin, A. Kania, M. Roth

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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.

Original languageAmerican English
Article number016105
JournalMaterials Research Express
Issue number1
StatePublished - Mar 2014

Bibliographical note

Publisher Copyright:
© 2014 IOP Publishing Ltd.


  • Acoustic emission
  • Burns temperature
  • Intermediate temperature
  • Phase transitions
  • Relaxor ferroelectrics


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