EXAMINE THIS REPORT ON FE²�?ZNS CRYSTAL

KLuS two solitary crystal samples undoped and doped using a low (5 %) or large (38 %) concentration of trivalent thulium or ytterbium ions have been synthesized in the shape of thin hexagonal plates. The very low phonon Electrical power (�?20 cm ⁻�?) was confirmed applying Raman spectroscopy. Samples were studied also by using optical absorpt