Dielectric spectra of Li+(Na+) codoped CaF2:YbF3crystals

✍ Scribed by Pruna, Andreea ;Stef, Marius ;Nicoara, Irina

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 730 KB
• Volume: 206
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200824273

✦ Synopsis

Abstract

Calcium fluoride crystals doped with YbF~3~ and codoped with NaF, LiF were grown using the vertical Bridgman method. The effect of Na^+^ and Li^+^ ions on the optical and dielectric spectra was studied. The relaxation parameters (the activation energy for dipole reorientation and relaxation time constant) and the number of the dipoles, N~D~, that contribute to the dielectric relaxation have been determined from the dielectric spectra. The correlation between N~D~ and the optical spectra is also discussed. A comparison of our results with those obtained by other authors is also given. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)