Investigation of the thermodynamics of trapped magnetic flux in type-I and type-II superconductors using polarized neutron imaging

Abstract

Polarized neutron imaging was used to observe field cooling (FC) and zero field warming (ZFW) processes in type-I and type-II superconductors. ZFW is an irreversible magnetic process that cannot be described by formulas and therefore it was studied experimentally with polarized neutron imaging to visualize and quantify the trapped magnetic flux as a function of temperature.