Precise determination of phonon constants in lead-free monoclinic (K0.5Na0.5)NbO3 single crystals
authors Rafiq, MA; Supancic, P; Costa, ME; Vilarinho, PM; Deluca, M
nationality International
journal APPLIED PHYSICS LETTERS
keywords RAMAN-SPECTROSCOPY; PIEZOELECTRIC PROPERTIES; PHASE-TRANSITION; CERAMICS; ORIENTATION; PBZR1-XTIXO3
abstract A polarized Raman analysis of ferroelectric (K0.5Na0.5)NbO3 (KNN) single crystals is presented. The Raman modes of KNN single crystals are assigned to the monoclinic symmetry. Angular-dependent intensities of A', A", and mixed A' + A" phonons have been theoretically calculated and compared with the experimental data, allowing the precise determination of the Raman tensor coefficients for (non-leaking) modes in single-domain monoclinic KNN. This study is the basis for non-destructive assessments of domain distribution by Raman spectroscopy in KNN-based lead-free ferroelectrics. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
publisher AMER INST PHYSICS
issn Mar-51
year published 2014
volume 104
issue 1
digital object identifier (doi) 10.1063/1.4860416
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000329838800020
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journal impact factor 3.597
5 year journal impact factor 3.4
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