Eur. Phys. J. B 51, 167-171 (2006)
https://doi.org/10.1140/epjb/e2006-00206-x

Far-infrared optical properties of YVO₄ single crystal

¹ National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, P.R. China
² Department of Physics, Wuhan University, Wuhan, Hubei, 430072, P.R. China

Corresponding author: ^a xgqiu@aphy.iphy.ac.cn

Received: 21 December 2005
Revised: 10 February 2006
Published online: 1 June 2006

Abstract

Near-normal incident infrared reflectivity spectra of a (001) YVO₄ single crystal have been measured at different temperatures in the frequency region between 100 and 6000 cm^-1. The reflectivity spectra are analyzed with the factorized form of the dielectric function, and the dielectric properties and optical conductivity of the YVO₄ crystal are obtained. From the TO/LO splitting, effective charges at different temperatures are calculated to study the ionicity of YVO₄. The internal modes of the VO₄^3- ion and the external modes of the Y(VO₄) lattice are compared with SiO₄^4- in zircon and with other rare-earth vanadates.