Non-contact magnetic levitation is a unique property that was proposed early on when high-temperature superconductors were discovered. The magnetic field capture performance of HTS bulk magnets improves the lower the temperature they are cooled to, and the employing the cryocoolers improves the device structure simpler and operation of the device easier. Due to the decreasing specific heat in the cryogenic temperature ranges, the operating temperature of the bulk magnets does not need to be cryogenic, and a simple and easy-to-use refrigerator can be applicable in the certain devices, which leads the advantage of entire simple devices. Since the dimensions of the bulk magnet directly affect the magnetic levitation performance, the largest bulk magnet currently available industrially was selected, and a commercially available single-pole permanent magnet was nominated to evaluate its magnetic levitation performance. The drag force of 10 N was obtained in the space 10 mm above the magnetic pole with the bulk magnet installed. Based on these findings, application to a non-contact mixer has been proposed to be commercialized.

Keywords: Superconductor, Bulk magnet, Cryocooler, Levitation, Permanent magnet