节点文献

超导体MgB₂中临界电流密度与磁场和温度之间的关系（英文）

DEPENDENCE OF CRITICAL CURRENTDENSITY ON MAGNETIC FIELD ANDTEMPERATURE IN SUPERCONDUCTOR MgB₂

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 Xie Xu+1 Feng Qing-rong+1 Gao Zheng-xiang+{1,2} Gan Zi-zhao+1Zhang Xi-xiang+2 Wen Ge-hui+2 Zheng Rong-kun+2 +1Department of Physics and National Laboratory of Mesoscopic Physics, Peking University, Beijing 100871 +2Department of Physics and Institute

【机构】北京大学物理系；人工微结构和介观物理国家重点实验室；香港科技大学物理系；纳米科学技术研究所；纳米科学技；

【摘要】用SQUID磁强计测量了在不同温度一直到 5T的MgB2 磁滞回线 ,确定了下临界磁场和样品的退磁因子 .临界电流密度对磁场和温度的关系可以用一个简单的函数拟合 .钉扎力密度符合Kramer标度律 ,但是峰值位置随温度移动 .更多还原

【Abstract】 Magnetic hysteresis loops of MgB-2 up to 5T were measured at different temperatures using a SQUID magnetometer. The lower critical magnetic field and demagnetization factor are determined. The excellent fitting to a simple function can well describe the dependence of the critical current density on the magnetic field and temperature. The pinning force densities follow Kramer scaling law, but peak positions shift with temperature.更多还原