DEVELOPMENT OF CONDUCTIVE La_(0.7)Sr_(0.3)MnO_3 BUFFER LAYERS FOR Cu-BASED RABiTS

摘要

For the development of YBa_2Cu_3O_(7-δ)(YBCO)-based coated conductors for electric power applications, it is desirable to electrically and thermally stabilize the high temperature superconducting (HTS) coating during its operation. In addition, use of non-magnetic substrates is an equally important consideration in conductor configurations, in order to reduce ferromagnetic hysteresis energy loss in ac applications. We have developed a conductive buffer layer of Lao.7Sr0,3Mn03 (LSMO) on biaxially textured non-magnetic Cu substrates to electrically couple the HTS layer to the underlying metal substrate. Property characterizations of YBCO films on LSMO/Ni/Cu multilayer architecture revealed good electrical connectivity over the entire structure.