摘要
用电泳法在厚度为5mm×10mm×0.5mm的YBa2Cu3O7-δ上沉积厚约70μm的La0.8Te0.2MnO3形成La0.8Te0.2MnO3/YBa2Cu3O7-δ(F/S)双层结构。通过扫描电子显微镜观察双层结构剖面的形貌,采用标准的四引线法测量YBa2Cu3O7-δ层的电阻特性。在F/S双层结构中通入1mA的注入电流,无论电流从S层流入F层(+Iinj),或者电流从F层流入S层(-Iinj),正常电阻均比未加注入电流时的电阻低;超导转变温度均比未加注入电流的转变温度高。
La_(0.8)Te_(0.2)MnO_3/YBa_2Cu_3O_(7-δ) (F/S) bilayers were fabricated by electrophoretic technique. The thickness of La_(0.8)Te_(0.2)MnO_3 is ～70 μm, the dimensions of YBa_2Cu_3O_(7-δ) superconductor are 5 mm×10 mm×0.5 mm. The image of cross-sectional profile was measured by scanning electron microscopy (SEM). Standard four-probe method was used for YBa_2Cu_3O_(7-δ) superconducting resistance measurements. Either 1 mA current is injected from S layer to F layer (+I_(inj)) or from F layer to S layer (-I_(inj)), the normal resistance is lower than that without current injection. The critical transition temperature is higher than that without current injection.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2004年第5期719-721,共3页
Journal of the Chinese Society of Rare Earths
基金
国家973项目(G1999064604)
北京交通大学论文基金资助
关键词
金属材料
庞磁电阻
超导电性
注入电流
稀土
metal materials
colossal magnetoresistance
superconductivity
injection-current
rare earths
