2/25/2024 0 Comments Magnetic dipole momentExamples of objects that have magnetic moments include loops of electric current, permanent magnets, elementary particles, composite particles, various molecules, and many astronomical objects. The magnetic moment is typically expressed as a vector. Clearly the field points out of the dipole on one end, and into it on the other, following the direction of the dipole moment. In electromagnetism, the magnetic moment is the magnetic strength and orientation of a magnet or other object that produces a magnetic field. The SI unit for magnetic moment is clearly N m T1 N m T 1. We'll start with a simple part of the field – along the axis defined by the dipole moment. As with the results above, we want our final answer in terms of the dipole moment, not the charge and separation. Okay, so what do they look like if we look at them from far away? Well, to determine this, we need to look at them as two charges (sigh, again), and look at the field they create at a distance much greater than their separation, \(d\). ![]() The geometry allows for a very uniform magnetic field to be established in the ring. If we are to treat dipoles as "packages," then we have to stop looking at them so closely. The g 2 storage-ring magnet at Fermilab, which was originally designed for the Brookhaven g 2 experiment. ![]() Note that the energy is a minimum when the dipole moment aligns with the external electric field. Metastable magnetic configurations of a periodic kagome lattice with N 27 dipole-coupled NPs in the unit cell. However, there is no such equivalent in magnetostatics. In electrostatics, electric charge can exist as single (monopole) charges. ![]() The propensity of a current distribution to experience torque in a magnetic field (and also create its own magnetic field) is characterized by its magnetic (dipole) moment. = -\overrightarrow p \cdot \overrightarrow E\] If placed at an angle in a magnetic field, a current loop will experience torque and rotate.
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