Bridgman growth and characterization of langanite(La_3Ga_(5.5)Nb_(0.5)O_(14),LGN)single crystal  

作　　者：Chengkai Ren Libin Yin Shuai Wang Weirong Chen Sheng Wang Kainan Xiong Xiaoniu Tu Ningzhong Bao Yanqing Zheng Jun Chen Erwei Shi 

机构地区：[1]Institute of Ceramics,Chinese Academy of Sciences,Shanghai,201800 China [2]State Key Laboratory of Material-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing,210009,China [3]The State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology,School of Microelectronics,Xidian University,Xi'an,710071,China [4]College of Materials Science and Chemical Engineering,Ningbo University,Ningbo,315211,China [5]Beijing Advanced Innovation Center for Materials Genome Engineering,Department of Physical Chemistry,University of Science and Technology Beijing,Beijing,100083,China [6]Hainan University,Haikou,570228,China

出　　处：《Journal of Rare Earths》2025年第3期584-590,I0006,共8页稀土学报(英文版)

基　　金：Project supported by the National Key R&D Program of China(2022YFB3204000);National Natural Science Foundation of China(51832009)。

摘　　要：As a promising optical and piezoelectric crystal,efficient growth of LGN single crystal is crucial for its practical applications.Herein,a langanite(La_(3)Ga_(5.5)Nb_(0.5)O_(14),LGN)crystal with high quality was successfully grown by the Bridgman method along the Z direction.In order to prepare high-purity polycrystalline precursors for LGN crystal growth,the sintering conditions of LGN polycrystalline precursors were studied in detail.The melting point of LGN was also measured to provide a reference for the crystal growth temperature.For the[001]oriented wafer,the full width at half maximum(EWHM)value of the nigh-resolution X-ray diffraction(HRXRD)analysis is 38.52",demonstrating that the LGN crystal exhibits excellent crystalline quality.In addition,we also measured the thermal properties and transmission spectrum of the as-grown LGN crystal.It is found that the absorption peak at 1.85μm of the LGN crystal grown in air using the Bridgman method disappears compared with previous reports(grown in N_(2+)(1-3)vol%O_(2)atmosphere),which is attributed to the oxygen-enriched growth environment.Similar phenomenon also occurs in other LGS-type disordered crystals.It is believed that these findings may expand the potential applications of LGS series crystals at 1.85μm.

关 键 词：Langanite Rare earths Bridgman method Oxygen-enriched growth Optical materials 

分 类 号：O78[理学—晶体学]