摘要
测量了Bi2 Sr2 CaCu2 O8单晶的ab面和c轴方向电阻 ,在其超导转变温度附近发现了反常的电阻峰出现 .其随外磁场 (>10 0Gs)和电流的增加而逐渐消失 .文章认为这个反常的电阻峰是由于单晶中超导相的不均匀分布而导致的准再进入行为 .
We have measured the resistance of some Bi\-2Sr\-2CaCu\-2O\-8 superconducting single crystals along ab plane and the c axis. In some single crystals, a remarkable resistivity anomaly near the superconducting transition temperature is observed in the ab plane. The peak is suppressed and vanishes gradually with increasing applied magnetic field (>100?Gs) or transport current. We proposed that the resistance peak is a quasi\|reentrant behavior due to the inhomogeneous distribution of the superconducting phase.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第10期2047-2050,共4页
Acta Physica Sinica
关键词
反常电阻峰
准再入行为
超导单晶
Bi\-2Sr\-2CaCu\-2O\-8, resistivity anomaly, quasi\|reentrant behavior
