Acoustic emission study of phase transitions and polar nanoregions in relaxor-based systems: Application to thePbZn1∕3Nb2∕3O3family of single crystals
作者： E. Dul’kin , M. Roth , P.-E. Janolin , B. Dkhil
DOI: 10.1103/PHYSREVB.73.012102
关键词: Burns temperature 、 Phase boundary 、 Condensed matter physics 、 Materials science 、 Electric field 、 Nuclear magnetic resonance 、 Polar 、 Acoustic emission 、 Strain energy 、 Phase transition
摘要: The restored strain energy in $\mathrm{Pb}{\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}$ (PZN) and $9%\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$-doped PZN (PZN-9%PT) relaxor crystals has been studied by means of acoustic emission (AE). Two types AE activity signals have recorded: (i) related to temperature- or electric-field-induced macroscopic phase transitions (ii) associated with formation/disappearance intrinsic polar nanoregions. Monitoring under varying [001] electric fields allowed a unique situ observation low-field $(1\phantom{\rule{0.3em}{0ex}}\mathrm{kV}∕\mathrm{cm})$ irreversible orthorhombic-to-${M}_{C}$ transition within the morphotropic boundary region PZN-9%PT.
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