Journal
JOURNAL OF APPLIED PHYSICS
Volume 114, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4816093
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Funding
- Major State Basic Research Development Program of China [2011CB922200, 2013CB922300]
- Natural Science Foundation of China [11074076, 61106122, 60906046]
- Projects of Science and Technology Commission of Shanghai Municipality [11520701300, 13JC1402100]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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The complex perovskite ferroelectric/antiferroelectric of (Pb1-1.5xLax)(Zr0.42Sn0.40Ti0.18)O-3 (PLZST) ceramics have been investigated by Raman scattering spectra from 77 to 480 K. It was found that phase transition occurs between La composition of 2.6% and 2.8% for PLZST ceramics. Softing of A(1)(TO1) mode and dramatic changes of relative strength from E(TO2) mode are observed at morphotropic phase boundary (MPB). Moreover, it was found that MPB characteristic shows a wider and lower trend of temperature region with increasing La composition. This could be ascribed to the diminishment of the energy barrier and increment of A-cation entropy. (C) 2013 AIP Publishing LLC.
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