Voltage-current characteristics of two soldered 2G HTS tapes

Abstract

Most prospective 2G HTS are asymmetric in cross section due to technology feature. Superconducting layer is located more close to one side of a tape, while from the other side highly resistive substrate is located. Thus, it is possible to combine two 2G HTS tapes with different mutual orientations of superconducting layers. In this work we studied voltage current characteristics (VCC) of eight samples made of two soldered HTS tapes (copper coated SCS4050 tapes from Super Power Inc.). Connection of samples to terminations varied as well. VCC measured were different depending on tapes' combining method, joint to terminations and external magnetic fields. Peculiarities on VCC were indicated a current transfer between tapes. Possible explanation of the phenomenon is discussed also. © 2010 IOP Publishing Ltd.