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magnetic moment

magnetic moment

1 7.2
A measure of how strongly something turns near a magnet and which way it points
  • noun
  • /mæɡˈnɛtɪk ˈmoʊmənt/
  • Specialized
translation icon : momento magnético
  • In physics, the magnetic moment is crucial for understanding the torque experienced by a magnet in a magnetic field.
  • magnetic moment of an electron
  • magnetic moment of a proton
  • magnetic moment of a neutron

So for a neutron or a proton the magnetic moment is much much smaller.

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Examples

  • That base magnetic field aligns all of the tiny hydrogen nuclei or protons in your body which have a magnetic moment, which means they act like tiny magnets.

  • So for a neutron or a proton the magnetic moment is much much smaller.

  • Or really it's the dot product of the magnetic moment and the and the magnetic field.

  • A good example for this is the magnetic moment of the Muon.

  • But Rabi also wanted to measure the signs of the magnetic moments.

    Academic text (1993)
  • Two groups have now verified the fact that the Muon has a differing magnetic moment than predicted by the standard model.

  • The experiments were far more difficult than the original SGE because the magnetic moments of nuclei are a thousand times smaller than those for electrons.

    Academic text (2003)
  • The magnetic moment is due solely to a half unit of spin angular momentum, which accounts for the twofold splitting.

    Academic text (2003)
  • In both GMR devices and in MTJs, the resistance depends on the relative directions of the magnetic moments because the electrons occupy different energy states depending on their spin.

    Academic text (2004)
  • The interaction between rare earth magnetic moments in a metal (known as the RKKY interaction) is mediated by the conduction electrons.

    Academic text (1998)

Synonyms

moment of a magnet
vsmagnetic moment
  • Specialized
9.2

A measure of how strongly and in what direction a magnet turns in a magnetic field

defines the property that lets a magnet exert torque rather than the torque itself
magnetic dipole moment
vsmagnetic moment
  • Specialized
8.4

A number that shows how strongly and which way something acts like a tiny magnet

emphasizes ability to exert torque in a field rather than producing the field

Surface Forms

Morphology

magnetic + moment

The term combines 'magnetic' (relating to magnetism) with 'moment' (a measure of rotational effect or torque), so the meaning — a torque-like measure of a magnet's strength and orientation — is directly inferable from the parts. This noun–noun technical compound follows ordinary compositional patterns and is cross-linguistically transparent, so a learner who knows both constituent senses can understand the MWE.

Etymology

Magnetic moment paints a simple picture: imagine a tiny arrow inside a magnet that shows how strong it is and which way it points. The word magnetic points to magnets and moment here suggests the power to make that arrow 'turn', so the phrase means a measure of the magnet's 'strength' and 'direction' for turning in a magnetic field.