Synthesis of superconductor MgCNi3 with carbon nanotubes |
| |
Authors: | Xia Qing-Lin Yi Jian-Hong Peng Yuan-Dong Luo Shu-Dong Wang Hong-Zhong Li Li-Ya |
| |
Affiliation: | School of Physical Science and Technology and State KeyLaboratory for Powder Metallurgy, Central South University,Changsha 410083, China |
| |
Abstract: | MgCNi3, an intermetallic compound superconductor with a cubicperovskite crystal structure, has been synthesized using fine Mg andNi powders and carbon nanotubes (CNTs) as starting materials by theconventional powder metallurgy method. The composition,microstructure and superconductivity are characterized using x-raydiffraction (XRD), energy dispersive x-ray (EDX) analysis, scanningelectron microscopy (SEM), and superconducting quantum interferencedevice (SQUID) magnetometer. The results indicate that the phases ofthe synthesized samples are MgCNi3 (major phase) and traces of Cand MgO. The MgCNi3 particle sizes range from several hundredsof nanometres to several micrometres. The onset superconductingtransition temperature Tc of the MgCNi3 sample is about7.2,K. The critical current density Jc is about 3.44×104A/cm2 calculated according to the Bean model from themagnetization hysteresis loop of the slab MgCNi3 sample at 5Kand zero applied field. |
| |
Keywords: | MgCNi3 superconductor synthesis carbon nanotubes |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|