人工晶体学报2024，Vol.53Issue(10)：1699-1704,6.
GaFeO3∶Mg晶体的生长及磁学性能研究
Growth and Magnetic Properties of GaFeO3∶Mg Crystals
摘要
Abstract
Multiferroic materials can realize the mutual coupling between force,electricity,magnetism and other physical fields,and have important application prospects in the field of small size,fast response and low power consumption of magnetoelectric devices.GaFeO3 is a highly promising multiferroic material featuring high spontaneous magnetization and polarization beyond room temperature.In this study,Ferroelectric MgxGa1_xFeO3(x=0.02,0.05,0.07 and 0.10)single crystals with a diameter of about 7 mm were grown by light floating zone method.The effect of Mg2+on the saturation magnetization and magnetic transition temperature of GaFeO3(GFO)crystals were studied.The structure and phase of the crystal were analyzed through XRD,the results show that all the prepared samples correspond to the diffraction characteristics of the standard crystal card library GFO(PDF#76-1005),and no other heterophase appears.The XRD refinement results indicate that,the crystal structure is orthogonal and its space group is Pna21.As the concentration of Mg2+rises,the lattice constant and cell volume initially increase and subsequently decrease.Additionlly,the magnetic properties of the crystal were studied through a comprehensive physical property measurement system,the magnetic transition temperature and saturation magnetization of the grown crytals also increase firstly and then decrease with the increase of Mg2+doping content.When the Mg2+doping amount is 0.07,the magnetic transition temperature and saturation magnetization reach the maximum values of 187.82 K and 8.75 emu/g,respectively,which achieves the purpose of doping modification.关键词
铁电单晶/GaFeO3∶Mg/光学浮区法/饱和磁化强度/磁性转变温度/矫顽场Key words
ferroelectric single crystal/GaFeO3∶Mg/optical floating zone method/saturation magnetization/magnetic transition temperature/coercive field分类
数理科学引用本文复制引用
王文凯,潘秀红,胡雨青,刘学超,陈小红,陈锟,方婧红,贺欢,倪津崎..GaFeO3∶Mg晶体的生长及磁学性能研究[J].人工晶体学报,2024,53(10):1699-1704,6.基金项目
国家重点研发计划(2021YFA0716304) （2021YFA0716304）
中国载人航天项目(YYMT1201-EXP02) （YYMT1201-EXP02）
上海市科技项目(22511100300,23DZ2201500) （22511100300,23DZ2201500）
