Demagnetizing the Superconducting Part of the Magnetic Cloak

With a focus on magnetic shielding techniques, this article discusses the compensation and control of magnetic fields based on superconducting and ferromagnetic materials. The magnetic cloak combines superconducting and ferromagnetic materials to achieve internal magnetic field suppression without notable deformation of the magnetic flux lines in surrounding space. Magnetic shielding deflects unwanted magnetic fields away from shielded objects, although complete blocking of magnetic flux is not possible. One of the cases of shielding is a magnetic cloak. Demagnetization of such cloak involves using the effect of dynamic magnetoresistance to reduce the remnant magnetic field in the shielded space by applying an axial alternating magnetic field. The demagnetization process consists of alternating demagnetization and relaxation periods. The results show that optimizing measurement parameters improves demagnetization efficiency, with a notable reduction in the remnant magnetic field. However, the process may be affected by various factors, and future steps aim to improve its reproducibility.