skip to main content

SciTech ConnectSciTech Connect

Title: Lifetime of the phonons in the PLT ceramic

The lifetimes at higher temperatures on lanthanum-modified lead titanate (PLT) are mainly due to the anharmonic decay of optical phonons into low-energy phonons. The temperature-independent contributions from inherent crystal defects and from boundary scattering become comparable to the phonon scattering contribution at lower temperatures. The thermal interaction is large at higher temperatures which decreases the phonon mean free path, and so the decay lifetime decreases as the temperature of the system is increased. This leads to the increased line width at higher temperatures. We made an estimate of the lifetimes for different concentrations and temperatures in PLT.
Authors:
;  [1] ;  [2]
  1. Departamento de Física, Universidad Nacional de Colombia, carrera 30 # 45-03, Bogotá 1149 (Colombia)
  2. Instituto de Física, Universidad de Antioquia, Calle 67 #53-108 Of.6-105, Medellin (Colombia)
Publication Date:
OSTI Identifier:
22390539
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1627; Journal Issue: 1; Conference: 14. Electroceramics Conference, Bucharest (Romania), 16-20 Jun 2014; Other Information: (c) 2014 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; CERAMICS; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; CRYSTAL DEFECTS; LANTHANUM COMPOUNDS; LEAD COMPOUNDS; LIFETIME; LINE WIDTHS; MEAN FREE PATH; PHONONS; SCATTERING; TEMPERATURE DEPENDENCE; TITANATES