Ca^(2+)/Mg^(2+)/Zr^(4+)不同化学计量比掺杂钆镓石榴石的性能  

Properties of Gadolinium Gallium Garnet Substituded with Different Stoichiometric Ratios of Ca^(2+)/Mg^(2+)/Zr^(4+)

作　　者：邵梅方 冯晋阳[1] 侯田江 马晓 SHAO Meifang;FENG Jinyang;HOU Tianjiang;MA Xiao(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Yangtze Optical Fibers and Cable Joint Stock Limited Company,Wuhan 430074,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]长飞光纤光缆股份有限公司,武汉430074

出　　处：《人工晶体学报》2025年第4期543-552,共10页Journal of Synthetic Crystals

基　　金：湖北省先进材料领域重点研发计划(2020BAB061)。

摘　　要：掺杂钆镓石榴石(SGGG)晶体是一种用于磁光单晶薄膜液相外延生长的重要衬底材料,结构均一、物性稳定的SGGG晶体是实现磁光单晶薄膜制备的基础。本文采用提拉法生长出4个不同Ca^(2+)/Mg^(2+)/Zr^(4+)化学计量比掺杂的钆镓石榴石晶体。X射线摇摆曲线测试表明:上述制备的晶体没有孪晶,结晶度高,半峰全宽(FWHM)分别为2.04′、2.07′、1.85′和1.98′,晶格常数为12.4404~12.4818,位错密度为53~161 cm^(-2);原子力显微镜(AFM)测试晶体(111)面的表面粗糙度为0.123~0.244 nm;晶体的热膨胀系数为8.27×10^(-6)~8.64×10^(-6);晶体在波长500~2500 nm具有良好的透过率。通过调节Ca^(2+)/Mg^(2+)/Zr^(4+)掺杂量制备的SGGG晶体可以满足磁光单晶薄膜外延生长用衬底材料的性能要求。Substituted gadolinium gallium garnet(SGGG)crystal is an important substrate material for liquid-phase epitaxial growth of magneto-optical single crystal thin films.SGGG crystals with uniform structure and stable physical properties are the basis for the preparation of magneto-optical single crystal thin films.This article reports the preparation of four different Ca^(2+)/Mg^(2+)/Zr^(4+)doped gadolinium gallium garnet crystals using the Czochralski method.The X-ray rocking curve test shows that the prepared crystals are high crystallinity without twinning,and full width at half maximum(FWHM)is 2.04′,2.07′,1.85′,1.98′,respectively,the lattice constant is 12.4404~12.4818.The number of dislocation density is 53~161 cm^(-2).The surface roughness of crystal surface(111)measured by atomic force microscopy(AFM)ranges from 0.123 nm to 0.244 nm.The thermal expansion coefficient of the crystal is 8.27×10^(-6)~8.64×10^(-6).The crystal has good transmittance in the wavelength range of 500~2500 nm.SGGG crystals prepared by adjusting the doping amount of Ca^(2+)/Mg^(2+)/Zr^(4+)can meet the performance requirements of substrate materials for epitaxial growth of magneto-optical single crystal thin films.

关 键 词：钆镓石榴石 钙镁锆掺杂 磁光晶体 衬底材料 提拉法 

分 类 号：O731[理学—晶体学]