Electromagnetic properties of composite materials for the electrical power device.
The current-voltage characteristics and the mechanism of memorized magnetic effect of a BiSrCaCuO superconductor were studied to develop a superconductor device. An external magnetic field produced an out-put voltage across the superconducting sample which increased with increasing the applied magnetic flux. The out-put voltage was not completely disappeared after removal of the magnetic field at a temperature. The appearance of the voltage was ascribed to the trapping of magnetic flux. The magnetic effect arose from the interaction between a trapped magnetic flux and a weak link of the superconducting bulk. The type and distribution of second phases are important factors to control magnetic pinning effect for a precisely controlled device.
Sang Heon
SH
Lee