铁电相Tb_2(MoO-4)_3晶体的生长和缺陷研究  

Study on Growth and Defects of Ferroelectric Tb_2(MoO_4)_3 Crystal

作　　者：徐民[1] 于永贵[1] 张怀金[1] 于晓强[1] 王继扬[1] Xu, Min[1]; Yu, Yong-Gui[1]; Zhang, Huai-Jin[1]; Yu, Xiao-Qiang[1]; Wang, Ji-Yang[1]

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100

出　　处：《人工晶体学报》2008年第6期1415-1419,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金重大项目(No.50590401)

摘　　要：钼酸铽[Tb2(MoO4)3]是一种具有铁电、铁弹和顺磁等多种性质的功能晶体。采用提拉法,沿[001]方向生长了Φ25mm×20mm的铁电相Tb2(MoO4)3晶体。采用化学腐蚀法、扫描电子显微镜(SEM)观察了晶体中的缺陷,结果显示,晶体中的主要缺陷是位错、镶嵌物。高分辨X射线衍射(摇摆曲线)实验表明所生长的Tb2(MoO4)3晶体具有很好的晶格完整性。Terbium molybdate [Tb2（M0O4）3] paramagnetie properties at room temperature. is a functional crystal with ferroelectric, ferroelastic and Ferroelectric Tb2（M0O4）3 crystal has been grown along [001 ] direction by Czochralski method. Defects in the Tb2（M0O4）3 crystal were observed by using chemical etching method and SEM topography. The results show that the main defects in the as-grown Tb2 （MoO4）3 crystal are dislocations and inclusions. High-resolution X-ray diffraction was used to check the quality of the as-grown Tb2（M0O4）3 crystal, and the result indicates that the as-grown crystal is of high quality.

关 键 词：Tb2(M0O4)3 晶体 位错 镶嵌物 摇摆曲线 

分 类 号：O78[理学—晶体学]