Instead of the light being absorbed, energy is stored in the magnetic moment.

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The measured magnetic moment of the electron agrees with that predicted by the Standard Model to within four parts per billion.

ECONOMIST: Particle physics

His measurements suggest that muons also differ from electrons in a property called magnetic moment, which governs a particle's interaction with magnetic fields.

ECONOMIST: Particle physics

According to Dr Roberts, however, the magnetic moment of muons could deviate from the model's predictions by almost 1% a massive discrepancy as these things go.

ECONOMIST: Particle physics

So the amount of electro-magnetic (EM) energy it could produce in any given moment is tiny.

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At the moment the mass-storage medium of choice is magnetic tape, which has the advantage of being cheap.

ECONOMIST: Computing