magnetic dipole moment
Noun: - (Physics) A fundamental property of a magnetic object or system: The magnetic dipole moment is a vector quantity that measures the strength and orientation of a magnetic dipole. It is the primary source of an object's external magnetic field and determines the torque it experiences in an external magnetic field. For a simple current loop, its magnitude is the product of the current and the area of the loop.
The term magnetic dipole moment is used to quantify and describe the magnetic characteristics of systems ranging from subatomic particles to planets. - The magnetic dipole moment of a bar magnet points from its south to its north pole. - Calculating the magnetic dipole moment is essential for understanding how a material will behave in a magnetic field. - An electron possesses an intrinsic spin magnetic dipole moment.
- In Quantum Mechanics: The of a particle, like an electron or proton, is directly related to its intrinsic angular momentum (spin). This is a key concept in explaining phenomena like nuclear magnetic resonance (NMR).
- In Geophysics: The Earth's is used to model the planet's magnetic field, which is generated by dynamo action in its molten outer core.
- Magnetic Moment: Often used interchangeably with , though in some contexts "magnetic moment" can be a more general term.
- Dipole Moment: A broader term that can refer to either an electric or a magnetic dipole moment. The prefix "magnetic" specifies the type.
- Orbital Magnetic Dipole Moment: The arising from the orbital motion of an electron around an atomic nucleus.
- Magnetic Moment (in the context of a dipole)
- Torque on a Dipole: The torque (τ) experienced by a magnetic dipole in an external field B is given by τ = μ × B, where μ is the vector.
- Potential Energy: The potential energy (U) of a magnetic dipole in an external field is U = -μ · B.
- (physics) a current loop gives rise to a magnetic field characteristic of a magnetic dipole
- An orbiting electron in an atom will have a magnetic dipole moment