Magnetic Behavior of High‐Temperature Superconducting Bulk Magnets and their Industrial Applications

Since the discovery of high‐temperature superconductivity, in addition to its widespread application in the superconducting coils and cables, there is a field known as, what we call, “bulk magnets,” in which the bulk crystals are grown from the powder materials by heat treatments. Bulk magnets are used as pseudo‐permanent magnets, and used for non‐contact magnetic levitation, which is unique to high‐temperature superconductivity, and are expected to have wide industrial applications in the future. This report introduces the pulsed field magnetizing method as a simple way to activate the bulk magnets, and refers to the research results. As for the application of strong magnetic field we refer to the studies on TD‐NMR using a single magnetic pole, the magnetic separation of Ni‐plating wastes, and the applications to rotating machines. As for the magnetic levitation, we take the human levitation models, the transport devices, and the non‐contact bearings. In all the above application, the important thing we would propose is to utilize not only liquid nitrogen but also small and easy‐to‐use cryocoolers, which could enhance the performance of the devices, broadening options into the technologies that are expected to have wide markets in the future. © 2025 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.