单温区管式炉气相输运生长NbSe_2超导单晶

化学气相输运（CVT）生长单晶通常采用双温区管式炉。利用普通单温区管式炉中的温度梯度实现了化学气相输运,并成功生长出了Nb Se2单晶。运用扫描电子显微镜,X射线衍射仪等方法对制备的Nb Se2单晶进行了形貌和结构的表征,并测量了低温下Nb Se2单晶的磁化率和电阻性质。结果表明,实验上生长出来的Nb Se2单晶具有金属光泽,晶体尺寸约为2 mm×2 mm,超导转变温度和转变宽度分别为7.1 K和0.3 K,超导体积分数约为79%。因此,单温区管式炉生长晶体的方法也可用于其他功能材料单晶的制备。...

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Bibliographic Details
Published in河北科技大学学报 Vol. 36; no. 3; pp. 251 - 254
Main Author 任世伟 李傲雷 董成
Format Journal Article
LanguageChinese
Published 2015
Subjects
Nb
Se2
化学气相输运
单温区管式炉
晶体学
超导电性
Online AccessGet full text
ISSN1008-1542

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Summary:化学气相输运（CVT）生长单晶通常采用双温区管式炉。利用普通单温区管式炉中的温度梯度实现了化学气相输运,并成功生长出了Nb Se2单晶。运用扫描电子显微镜,X射线衍射仪等方法对制备的Nb Se2单晶进行了形貌和结构的表征,并测量了低温下Nb Se2单晶的磁化率和电阻性质。结果表明,实验上生长出来的Nb Se2单晶具有金属光泽,晶体尺寸约为2 mm×2 mm,超导转变温度和转变宽度分别为7.1 K和0.3 K,超导体积分数约为79%。因此,单温区管式炉生长晶体的方法也可用于其他功能材料单晶的制备。
Bibliography:REN Shiwei , LI Aolei , DONG Cheng （1. School of Science, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China; 2. Institute of Physics, Chinese Academy of Science, Beijing 100190, China）
13-1225/TS
crystallology; NbSez ; single temperature tube furnace; chemical vapor transport; superconductivity
Dual-temperature tube furnace is generally used to produce single crystal by chemical vapor transport （CVT）. The temperature gradient of single-temperature tube furnace is used to grow NbSez single crystal by CVT. The obtained single crystals are characterized via X-ray diffraction （XRD） and scanning electron microscopy （SEM）, and the magnetization and resistance of NbSez single crystal under low temperature are measured. The NbSe2 crystal has a metallic luster and typical dimension of about 2 ram× 2 mm. The single crystal NbSe2 shows superconducting transition temperature of 7.1 K and transi- tion width of 0.3 K. The estimated superconducting volume fraction is around 79%. The method employed
ISSN:1008-1542