A duo-coil device for absolute value measurement of magnetic field penetration distance of a large-area high-temperature superconductor thin film

摘要

The present invention relates to an apparatus for measuring the absolute magnitude of a magnetic penetration depth Of a large-area superconductor thin film using a weak magnetic field of a low frequency or a direct current. In the superconducting state, the magnetic field is completely blocked, State high-temperature superconductor thin film, which is a sample to be measured by making a sufficiently low transition temperature thin film having a characteristic of being transparent to a magnetic field when it is in a state, and a conventional two-coil apparatus ), It is possible to perform zero measurement of the twin-coil device and measurement of the sample film in a single measurement, thereby solving the mechanical problems caused by the zero adjustment.