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ferromagnetism

A Dictionary of Earth Sciences | 1999 | | © A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

ferromagnetism In the strict sense, magnetism occurring in substances in which the electron spins are coupled by quantum-mechanical exchange forces so that, within a single volume element, all electron-spin vectors are in the same direction. Typical materials are pure iron, nickel, and iron-nickel alloys found in meteorites and lunar samples. See also FERRIMAGNETISM; andANTIFERROMAGNETISM.

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