skip to main content

Title: Acoustic emission during the ferroelectric transition Pm3{sup ¯}m to P4mm in BaTiO{sub 3} and the ferroelastic transition R3{sup ¯}m-C2/c in Pb{sub 3}(PO{sub 4}){sub 2}

Acoustic emission (AE) spectroscopy without frequency filtering (∼broadband AE) and moderate time integration is shown to be sensitive enough to allow the investigation of subtle nano-structural changes in ferroelectric BaTiO{sub 3} and ferroelastic Pb{sub 3}(PO{sub 4}){sub 2}. AE signals during weak phase transitions are compatible with avalanche statistics as observed previously in large-strain systems. While the data are too sparse to determine avalanche exponents, they are well suited to determine other thermodynamic parameters such as transition temperatures and critical stresses.
Authors:
 [1] ; ;  [2]
  1. Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ (United Kingdom)
  2. Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904 (Israel)
Publication Date:
OSTI Identifier:
22398904
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACOUSTICS; BARIUM COMPOUNDS; CUBIC LATTICES; EMISSION SPECTROSCOPY; FERROELECTRIC MATERIALS; LEAD PHOSPHATES; MONOCLINIC LATTICES; PHASE TRANSFORMATIONS; STATISTICS; STRAINS; STRESSES; TETRAGONAL LATTICES; THERMODYNAMICS; TITANATES; TRANSITION TEMPERATURE