Ferroelectric transition and melting temperatures of new compounds: CsTiOAsO₄and Cs_xM_1-xTiOAs_yP_1-yO₄with M identical to K or Rb

Abstract

The authors have synthesised, by the flux-growth method, millimetric crystals of new isotype compounds of KTiOPO4 which also have nonlinear optical properties: cesium titanyl arsenate CsTiOAsO4 and the complete or incomplete solid solutions of general formula CsxM1-xTiOAsyP1-yO4 with M identical to K or Rb. The second harmonic generation test (SHG:1.064 mu m/0.532 mu m) is positive for all these compounds. The ferroelectric transition temperatures are determined by measuring the temperatures at which the SHG disappears. The melting points of the compounds are also determined.