Abstract: An iron ball suspending in a cylindrical permanent magnet is realized by modifying the magnetic field distribution with iron balls array. We use the solenoid model and the interaction of levitate iron ball and permanent magnet and the magnetize iron balls array to calculate the three-dimensional distribution of the permanent magnet. The energy minimum indeed existing in the energy carve drawn is presented numerically by the MatLab software in this magnetization system, which makes sure the iron ball to suspend in midair stably. Based on this foundation we do the experimental study and the experimental result is in agreement with the theoretical calculation. This may be applied in magnetic levitation fields in the room temperature.

Key words: permanent magnet, iron ball, magnetic levitation