YbBi_2单晶的合成及其X射线衍射的实验研究

PREPARATIONS OF YbBi_2 SINGLE CRYSTAL AND ITS XRD PATTERNS

利用 flux法成功合成了高纯的 Yb Bi2 单晶 .实验发现本文合成的 Yb Bi2 单晶是片状晶体 ,平均面积为 4 8mm2 ,厚度 1 mm,在常温下处于亚稳态 ,容易氧化 .利用粉末法仅有一个衍射峰可以明确判定为 Yb Bi2 的衍射峰 ;利用 Yb Bi2 单晶进行射线衍射实验 ,仅能获得 ( 0 1 0 )面的一系列衍射峰 ,其它衍射峰却很难获得 .本文首次采用了对尺度逐渐减小的晶粒进行 X射线衍射的方法 ,成功获得 Yb Bi2 的 XRD谱 .

High purity of YbBi 2 single crystal was prepared by flux way. YbBi 2 is layered structure material and it is easily oxidized. Not all of its picks can be getting by usual X-ray powder diffraction. Using small pieces of YbBi 2 single crystals which diameters were decreased gradually for X-ray diffraction, XRD patterns of YbBi 2 single crystal that include independent picks were gotten successfully.