Unusual Hall effect in superconducting MgB2 films -: art. no. 220506

被引：47

作者：

Jin, R ^{[1
]}

Paranthaman, M ^{[1
]}

Zhai, HY ^{[1
]}

Christen, HM ^{[1
]}

Christen, DK ^{[1
]}

Mandrus, D ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.64.220506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB2 films (T-c0 = 38.0 K) in both the normal and superconducting states. Our results show that the normal-state Hall coefficient R-H is positive and increases with decreasing temperature, independent of the applied magnetic field (to 8 T). We find that R(H)(-1)proportional to T(40-300 K) and cot OH proportional toT(2)(100-300 K). As the sample is cooled below T-c(H), R-H decreases rapidly with temperature and changes sign before it reaches zero. The position and magnitude at which R-H shows a minimum depends on the applied field.

引用

页数：4

共 33 条

[1] Superconductivity - Is kinky conventional? [J].