Raman and infrared spectroscopic investigations on the crystal structure and phonon modes of LaYbO3 ceramics

MOREIRA, R L, FETEIRA, Antonio and DIAS, A (2005). Raman and infrared spectroscopic investigations on the crystal structure and phonon modes of LaYbO3 ceramics. Journal of Physics - Condensed Matter, 17 (17), 2775-2781.

Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0953-8984/17/17/027
Link to published version:: 10.1088/0953-8984/17/17/027

Abstract

LaYbO3 is a highly distorted perovskite with orthorhombic structure. However, its exact space group has been a matter of debate. Both the polar Pna2(1) and the centrosymmetric Pnma space groups, with Z = 4, have been proposed to describe its structure at room temperature. In this work we present optical spectroscopic investigations by Raman scattering and infrared reflectivity of LaYbO3 ceramics sintered at 1600 degrees C. The results allowed us to propose a new centrosymmetric Cmcm space group for this compound, and to show which phonons give the main contributions to its dielectric constant and quality factor at microwave frequencies.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1088/0953-8984/17/17/027
Depositing User: Hilary Ridgway
Date Deposited: 07 Jun 2012 11:50
Last Modified: 07 Jun 2012 11:50
URI: http://shura.shu.ac.uk/id/eprint/5355

Actions (login required)

View Item

Downloads

Downloads per month over past year

View more statistics