Superconducting Properties of MgB_(2) Prepared by High Pressure and Ambient Pressure  

作　　者：REN Zhi-An CHE Guang-Can ZHAO Zhong-Xian CHEN Hong DONG Cheng NI Yong-Ming JIA Shun-Lian WEN Hai-Hu 任治安;车广灿;赵忠贤;陈红;董成;倪泳明;贾顺莲;闻海虎(National Laboratory for Superconductivity,Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080)

机构地区：[1]National Laboratory for Superconductivity,Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080

出　　处：《Chinese Physics Letters》2001年第4期589-591,共3页中国物理快报（英文版）

基　　金：Supported by the Ministry of Science and Technology of China(NKBRSF-G19990646);the National Natural Science Foundation of China under Grant No.19825111。

摘　　要：The new superconductor MgB_(2) has been prepared by two ways: high pressure and ambient pressure synthesis. Their superconducting properties were measured and compared. It is found that the sample prepared by high pressure is much denser than that prepared under ambient pressure. Accordingly the high pressure sample has a very narrow transition width and a much higher bulk critical current density.

关 键 词：synthesis. AMBIENT SUPERCONDUCTOR 

分 类 号：TB3[一般工业技术—材料科学与工程]