Title: Enhancement of Levitation Force Characteristics in High Tc Superconducting Levitation.
Abstract: Two methods for superconducting magnetic levitation are investigated to enhance levitation characteristics such as levitation force and horizontal stability. In one of the investigated methods, not only a repulsive force between a permanent magnet and a superconductor but also the force between two permanent magnets is utilized to achieve strong levitation force and horizontal stability. In an other method, a high Tc superconductor was preliminarily magnetized by a permanent magnet via a field-cooling process. Levitation forces and horizontal stability in the proposed system were numerically evaluated using a computer program based on the critical state model.