Patent ID: 6069395
Filing Date: 2000-05-30
Classification: H01F,Y10S

Abstract:
Current leads comprising a first current lead and a second current lead connecting a power supply placed in a room-temperature environment and a superconducting coil placed in an ultra-low-temperature environment so as to form a current circuit wherein a current from the power supply flows through the first current lead, the superconducting coil and the second current lead and returns to the power supply, wherein:said first current lead comprises:a room-temperature N-type thermoelectric semiconductor selected from the group consisting of Bi.sub.2 Te.sub.3 including an N-type dopant and (BiSb).sub.2 Te.sub.3 including an N-type dopant,a low-temperature N-type thermoelectric semiconductor consisting of BiSb with an N-type dopant, anda Bi--Sr--Ca--Cu--O-based high-temperature superconductor; andsaid second current lead comprises:a room-temperature P-type thermoelectric semiconductor selected from the group consisting of (BiSb).sub.2 Te.sub.3 including a P-type dopant and (L3iSb).sub.2 Te.sub.3 including a P-type dopant,a low-temperature P-type thermoelectric semiconductor consisting of BiSb with an N-type dopant, anda Bi--Sr--Ca--Cu--O-based high temperature superconductor.