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The magnetic moment of a magnet is a quantity that determines the force that the magnet can exert on electric currents and the torque that a magnetic field will exert on it. A loop of electric current, a bar magnet, an electron, a molecule, and a planet all have magnetic moments.
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Curie and „magnetism way to strong for known physics“ (at that time)
While Pierre Curie did undertake an early experimental study of ferromagnetism, as far as I can tell it was actually Pierre Weiss who first introduced the concept of this large magnetic field.
Weiss d …
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What is the motivation behind the Heisenberg Hamiltonian?
The Heisenberg Hamiltonian was developed as an effective model of ferromagnetism. By this I mean that it emulates the known behaviour of ferromagnetic materials without explaining the underlying cause …