Title :
Anomalous dielectric effect of La/sub 2-x/Sr/sub x/CuO/sub 4/
Author :
Sugahara, M. ; Wu, S.-B. ; Han, X.-Y. ; Lu, H.-F. ; Haneji, N. ; Kaneda, H. ; Yoshikawa, N.
Author_Institution :
Fac. of Eng., Yokohama Nat. Univ., Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
The dielectric response of c-axis oriented La/sub 2-x/Sr/sub x/CuO/sub 4/ film is experimentally studied using Pd/La/sub 2-x/Sr/sub x/CuO/sub 4//(100)SrTiO/sub 3//Pd multi-layer structure. Anomalous capacitance increase is observed at Sr doping level x/spl ap/1/2/sup n/, where the drop of resistivity in bulk La/sub 2-x/Sr/sub x/CuO/sub 4/ in normal state has been reported.
Keywords :
capacitance; dielectric thin films; high-temperature superconductors; lanthanum compounds; strontium compounds; superconducting thin films; La/sub 2-x/Sr/sub x/CuO/sub 4/ film; Pd-(LaSr)/sub 2/CuO/sub 4/-SrTiO/sub 3/-Pd; Pd/La/sub 2-x/Sr/sub x/CuO/sub 4//(100)SrTiO/sub 3//Pd multilayer; capacitance; dielectric response; doping; normal state; resistivity; Atmosphere; Capacitance measurement; Dielectric substrates; Dielectric thin films; Doping; Electrodes; Frequency; Sputtering; Strontium; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
