Cryogenically enhanced magneto-Archimedes levitation

The application of both a strong magnetic field and magnetic field gradient to a diamagnetic body can produce a vertical force which is sufficient to counteract its weight due to gravity. By immersing the body in a paramagnetic fluid, an additional adjustable magneto-buoyancy force is generated which enhances the levitation effect. Here we show that cryogenic oxygen and oxygen–nitrogen mixtures in both gaseous and liquid form provide sufficient buoyancy to permit the levitation and flotation of a wide range of materials. These fluids may provide an alternative to synthetic ferrofluids for the separation of minerals. We also report the dynamics of corrugation instabilities on the surface of magnetized liquid oxygen.

[1]  Shoogo Ueno,et al.  Magneto-Archimedes separation and its application to the separation of biological materials , 2004 .

[2]  M. Ataka,et al.  High-quality crystallization of lysozyme by magneto-Archimedes levitation in a superconducting magnet , 2004 .

[3]  P. King,et al.  Surface instabilities on liquid oxygen in an inhomogeneous magnetic field. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[4]  P. J. King,et al.  Magnetic levitation: Floating gold in cryogenic oxygen , 2003, Nature.

[5]  Yasuhiro Ikezoe,et al.  Separation of feeble magnetic particles with magneto-Archimedes levitation , 2002 .

[6]  A. Geim,et al.  Magnet levitation at your fingertips , 1999, Nature.

[7]  Michael V Berry,et al.  Of flying frogs and levitrons , 1997 .

[8]  K. Nishigaki,et al.  Deformation of the Liquid Oxygen Meniscus Induced by Magnetic Field , 1994 .

[9]  Measurements of the Surface Tension of Liquid Oxygen in High Magnetic Fields , 1992 .

[10]  R. Tournier,et al.  Levitation of organic materials , 1991, Nature.

[11]  M. Date,et al.  Liquid Oxygen under High Magnetic Field , 1988 .

[12]  A. Gailītis.  Formation of the hexagonal pattern on the surface of a ferromagnetic fluid in an applied magnetic field , 1977, Journal of Fluid Mechanics.

[13]  James R. Melcher,et al.  Dynamics and stability of ferrofluids: surface interactions , 1969, Journal of Fluid Mechanics.

[14]  R. E. Rosensweig,et al.  The interfacial stability of a ferromagnetic fluid , 1967, Journal of Fluid Mechanics.