【摘要】 用提拉法沿a轴和c轴成功生长出质量优良的Nd:YbVO4新型单晶。采用HRXRD-D5005型高分辨X射线衍射仪测得晶体的摇摆曲线,可以测得(400)面的半峰宽为70.92〃,(004)面的半峰宽为19.80〃。测得掺杂浓度为1%原子分数Nd:YbVO4晶体中Nd离子的有效分凝系数Keff为0.54。在298.15~573.15K温度范围内测量了晶体的热膨胀系数,αa=2.6×10-6/K,αb=2.5×10-6/K,αc=8.7×10-6/K;测得比热值为0.45~0.65 J/g.K。测量了晶体的热扩散系数a,从而得到了其热导率λ。更多还原

【Abstract】 A new crystal Nd:YbVO₄ has been successfully grown by the Czochralski method.The rocking curves from（004） and（400） diffraction planes of the as-grown Nd:YbVO₄ crystal were measured by the high-resolution X-ray diffractometer（HRXRD）-D5005,and the full-width values at half-maximum were（19.80）^〃 for（004） face and 70.92^〃 for（400） face,respectively.The measured effective segregation coefficients were 0.54 for Nd³⁺ and near 1 for V³⁺ and Yb³⁺ by the X-ray fluorescence method.The measured thermal expansion coefficients are α_a=2.6×10^-6/K,α_b=2.5×10^-6/K and α_c=8.7×10^-6/K from 298.15 to 573.15K along its crystallographic a,b and c axes,respectively.The measured specific heat is 0.45-0.65J/g·K in the temperature range from 298.15 to 573.15K.The thermal diffusion coefficients of Nd:YbVO₄ were measured and the thermal conductivities were also calculated.更多还原