Refrigeration Methods using Adiabatic Magnetization on Type-I and High Tc Superconductors

We will study solid state refrigeration methods using type-I superconductors and high Tc superconductors. We employ the formation of intermediate state in both types of the superconductors as the source for cooling. Type-I superconductors can act as a working substance on which work is applied through magnetic field to cool down a normal metal substrate. We look to optimize the refrigeration cycles in two different cases. The first case is when the substrate, the working substance and the reservoir are detachable. The second case is when all three are in contact with each other at all times. Our analysis suggests that it is possible to cool down the substrate to around 1 mK starting from 100 mK. A similar method for refrigeration will be studied using the high Tc superconductor, which has the benefit of a higher temperature range for the reservoir.