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[19a-A202-11] Magneto-Archimedes levitation of glass particles by permanent magnets
Keywords:Magneto-Archimedes, Permanent magnets, Self-organization
Magnetic levitation of diamagnetic material can be observed in an extremely strong magnet such as a hybrid magnet which consists of a Bitter type magnet and a (or multiple) superconducting magnet(s), However, if we utilize Magneto-Archimedes levitation technique, we can realize a magnetic levitation of objects even in a small magnet. For example, paramagnetic aqueous solution including MnCl2 boosts magnetic force acting on the object which is placed in the solution, and thus, plastic particles are levitated by NdFeB permanent magnet.
In this study, we tried to realize magnetic levitation of glass particles by using permanent magnets. Generally, magnetic levitation of plastic materials is not difficult because its density is very close to that of the aqueous solution; medium including paramagnetic ions. However, levitation of glass is quite difficult. It is because the density of glass is two times more than water and magnetic force is not strong to lift up glass particles. In order to realize the magnetic levitation of glass, we firstly investigated the magnetic field distribution between two magnets which are placed facing the different poles each other. The simulation shows that the magnetic force is almost same as that of a superconducting magnet when these two magnets are placed in a small distance, for example, less than 2 mm. In our study, two arch-shaped magnets were used to generate strong magnetic force, and glass particles with the diameter of 80 mm was introduced in the MnCl2 aqueous solution which was located between the two magnets. As a result, we found that glass particles levitated in MnCl2 aq with the concentration of more than 300 g/L.
In this study, we tried to realize magnetic levitation of glass particles by using permanent magnets. Generally, magnetic levitation of plastic materials is not difficult because its density is very close to that of the aqueous solution; medium including paramagnetic ions. However, levitation of glass is quite difficult. It is because the density of glass is two times more than water and magnetic force is not strong to lift up glass particles. In order to realize the magnetic levitation of glass, we firstly investigated the magnetic field distribution between two magnets which are placed facing the different poles each other. The simulation shows that the magnetic force is almost same as that of a superconducting magnet when these two magnets are placed in a small distance, for example, less than 2 mm. In our study, two arch-shaped magnets were used to generate strong magnetic force, and glass particles with the diameter of 80 mm was introduced in the MnCl2 aqueous solution which was located between the two magnets. As a result, we found that glass particles levitated in MnCl2 aq with the concentration of more than 300 g/L.