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What is the difference between electromagnets and permenant magnets?

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What is the difference between electromagnets and permenant magnets?

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Electromagnets have a magnetic field only when current runs through them (through their circuits) and permanent magnets have a magnetic field all the time. Normal pieces of matter are composed of particles such as protons, neutrons, and electrons; and all of these have the fundamental property of quantum mechanical spin. Spin gives each one of these particles an associated magnetic field. Because of this, and the fact that the average microscopic piece of matter contains huge numbers of these particles, it would be expected that all matter would be magnetic. Even antimatter would have magnetic characteristics. However, everyday experience shows that many materials do not. Within each atom and molecule, the spin of each of these particles is highly ordered as a result of the Pauli Exclusion Principle. However, there is no long-range ordering of these spins between atoms and molecules. Without long-range ordering, there is no net magnetic field because the magnetic moment of each one of

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