Magnetic fields in the 150‐kG range are being used at the MIT National Magnet Laboratory in an attempt to extract magnetic monopoles from ferromagnetic materials, where they may have been accumulating for geological periods of time. Although results are inconclusive so far, they are compatible with a charge one third the value predicted by P.A.M. Dirac in 1931.

Topics
Geological period, Ferromagnetic materials, Laboratories
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© 1967 American Institute of Physics.
1967
American Institute of Physics
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