9(VO 4) 7 crystals]]>

摘要

AbstractSingle crystals of YCa9(V1?xNbxO4)7were grown using the Czochralski method. Their structure and the second-harmonic generation (SHG) were investigated. Structural refinements of these crystals show that when x is equal to 0.04, the {VO4} tetrahedra are most distorted. The SHG measurements reveal that the SHG intensity increases with increasing the Nb concentration until the formation of Y3NbO7phase, and the optimum concentration of Nb substituting for V in the crystal is 4?mol%, which provides the maximal SHG efficiency and allows the realization of phase-matching for a Nd:YAG 1.064?μm laser. Nb doping makes YCa9(V1?xNbxO4)7crystals potential for nonlinear optical applications.Graphical abstractDisplay OmittedHighlights?Nb doping results in larger distortion of the {VO4} tetrahedra in YCa9(V1?xNbxO4)7than their counterparts in YCa9(VO4)7.?Nb doping results in the SHG intensities enhancement of YCa9(V1?xNbxO4)7crystals.?Enhanced SHG efficiency of the crystal is, most likely, due to structural deformation, introduced by Nb doping.]]>