Temperature-dependent thermo-mechanical and Raman spectroscopy study of the SRS-active melilite-type crystal Ca2ZnSi2O7 (hardystonite) at its incommensurate-commensurate phase transition

✍ Scribed by Becker, Petra ;Libowitzky, Eugen ;Bohatý, Ladislav ;Liebertz, Josef ;Rhee, Hanjo ;Eichler, Hans-Joachim ;Kaminskii, Alexander A.

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 622 KB
• Volume: 209
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127415

✦ Synopsis

Abstract

Stimulated Raman scattering (SRS) active crystals of Ca~2~ZnSi~2~O~7~ (hardystonite) adopt a melilite‐type structure at temperatures above ca. 402 K, while at ambient conditions they show a two‐dimensionally incommensurate structure modulation. To study the influence of the incommensurability of the structure on SRS‐based χ^(3)^‐nonlinear lasing of the crystals temperature‐dependent Raman spectroscopy investigations at the commensurate–incommensurate phase‐transition and comparative SRS measurements in the high‐temperature and in the low‐temperature phase of Ca~2~ZnSi~2~O~7~ are reported. In addition, the commensurate–incommensurate phase transition is characterised by caloric and dilatometric measurements, and linear optical properties of the crystals are given.