光学浮区法生长高质量EuFeO_3单晶  

Optical-floating-zone Growth of High Quality EuFeO_3 Single Crystal

作　　者：詹晟[1] 曹世勋[1] 袁淑娟[1] 张金仓[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《材料导报》2012年第20期30-32,49,共4页Materials Reports

基　　金：国家自然科学基金重点项目(50932003;11074163);上海市自然科学基金(10ZR1411000);上海市教育委员会科研创新项目(12YZ018)

摘　　要：通过光学浮区法生长了直径约为6mm、长度约为45mm的高质量EuFeO3晶体。对所获得的晶体沿着生长方向进行切片并抛光,使用扫描电镜(SEM)观察不同切片表面的形貌,以了解晶体的生长过程,同时使用EDS能谱分析晶体成分,结果显示通过光学浮区法获得的EuFeO3晶体具有良好的成分一致性,铁元素与稀土铕元素物质的量比为1∶1。摇摆曲线结果显示晶体具有良好的结晶质量。对EuFeO3晶体进行磁性测量,发现EuFeO3晶体在不同方向上表现出强烈的磁各向异性,c轴方向上奇特的分步磁化现象可能是由于晶体内磁化难轴和易轴的改变所致。The EuFeO3 crystal with good quality was successfully grown using the optical-floating-zone me- thod. The diameter of the crystal is about 6mm and the length is about 45mm. The whole crystal rod was cut into se- veral parts along the growth direction. SEM was employed to observe the morphology of the polished cross-sections, and EDS was employed to detect the content of the single crystal. The results show that the composition ratio between Fe and Eu is 1 ： 1. The Xray rocking wave indicates the high integrality of crystal structure. The magnetic magneti- zation of EuFeOa along different directions shows strong anisotropy. The novel step-like magnetization along the c di- rection is discussed in terms of the change of the magnetization easy axis and the magnetization hard axis in the EuFeO3 crystal.

关 键 词：光学浮区法 EuFeO3晶体 SEM EDS 

分 类 号：O78[理学—晶体学]