Single Crystal Growth of Bi2Sr2Can-1CunOy Superconductors by the Floating Zone Method
Single Crystal Growth of Bi2Sr2Can-1CunOy Superconductors by the Floating Zone Method
复制标题
浮区法单晶生长 Bi2Sr2Can-1CunOy 超导体
DOI：
10.2109/jcersj.97.1009
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发表时间：
1989
影响因子：
1.1
通讯作者：
K. Kitazawa
中科院分区：
文献类型：
--
作者：
N. Motohira;K. Kuwahara;T. Hasegawa;K. Kishio;K. Kitazawa
采用浮区技术制备了Bi2Sr2Can-1CunOy超导体晶体。考察了氧压和生长速率对其生长的影响。氧气压力范围为PO2=0.005 ~ 1atm，生长速率范围为60 ~ 0.8mm/h。结果表明，较高的氧压力对232 （n=2）相和221 （n=1）相的单相试样生长都有重要影响。实验还表明，形成232相和221相的单相试样都需要较低的生长速率。232相（4.1×1.3×0.1mm3）和221相（1.3×0.06×0.01mm3）的单晶生长速度分别为0.8mm/h和3mm/h。然而，用这种方法至今还没有得到243 （n=3）相的单晶。
Crystals of Bi2Sr2Can-1CunOy superconductors were grown by the floating zone technique. The effects of oxygen pressure and growth rate were investigated. Oxygen pressures were varied from PO2=0.005 to 1atm, and the growth rate from 60 to 0.8mm/h. It was found that higher oxygen pressures were important in growing single phase specimens of both the 232 (n=2) and the 221 (n=1) phases. It was also demonstrated that a lower growth rate was required to form single phase specimens of both the 232 and the 221 phases. Single crystals of the 232 phase up to 4.1×1.3×0.1mm3 and of the 221 phase up to 1.3×0.06×0.01mm3 were grown at growth rates of 0.8mm/h and 3mm/h, respectively. However, no single crystals of the 243 (n=3) phase have been obtained so far by the present method.