Phonon, optical and dielectric properties of RbNd(WO 4) 2 laser crystal

• Published in: Optical materials Vol. 32; no. 11; pp. 1463 - 1470
• Main Authors: Mączka, M., Macalik, L., Macalik, B., Majchrowski, A., Świrkowicz, M., Hanuza, J.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 2010; Elsevier
• Subjects: Absorption spectra; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conductivity; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Infrared and raman spectra and scattering; Laser material; Laser materials; Optical materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optics; Other nonmetallic inorganics; Phonon properties; Physics; Tungstate; Conductivity; Phonon properties; Absorption spectra; Laser material; Tungstate; Rubidium Tungstates; Raman spectra; Dielectric materials; Laser materials; Infrared spectra; Monocrystals; Potassium tungstates; Optical materials; Quaternary compounds; Neodymium Tungstates
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2010.06.001

Polarized Raman, IR, optical and dielectric studies of RbNd(WO 4) 2 single crystal have been performed. Symmetries of the observed Raman and IR modes have been established and their assignment to respective motions of atoms has been proposed. We have shown that the phonon properties of RbNd(WO 4) 2 are very similar to the phonon properties of KGd(WO 4) 2 but significantly different from properties of isostructural KLu(WO 4) 2 and KYb(WO 4) 2. The intensity parameters determined for RbNd(WO 4) 2 by means of the Judd–Ofelt theory are the most similar to those reported for KLu(WO 4) 2:Nd 3+. Dielectric measurements have revealed that this crystal exhibits low DC conductivity with the activation energy 1.02 eV up to 773 K and 1.22 eV at higher temperatures.