Abstract: Diamagnetic levitation, whose compactness and simplicity are important, thas a bright application prospect. This paper presents a study of the magnetic material＇s suspension in magnetic field of 2×2 magnet array. First, we use MATLAB to get the magnetic field of any position near the magnet array. Then, we obtain quite clear figures of Hz,Hz, -HzHz at any height above the surface of the magnet array. The experimental results by virtue of a thin graphite piece levitating above the center of the 2×2 magnets array confirm the theoretical model. Due to Fz =-xVHzHz, -HzHz indicates the force of the material in the magnetic field. The results of the experiment and theory indicate that the steady levitation of diamagnetic materials above magnet arrays can be well realized. We also get the relationship between the suspension height of graphite pieces and the size of graphite pieces.

Key words: magnetic levitation, magnet array, MATLAB