Magnetization

In classical electromagnetism, magnetization or magnetic polarization is the vector field that expresses the density of permanent or induced magnetic dipole moments in a magnetic material. The origin of the magnetic moments responsible for magnetization can be either microscopic electric currents resulting from the motion of electrons in atoms, or the spin of the electrons or the nuclei. Net magnetization results from the response of a material to an external magnetic field, together with any unbalanced magnetic dipole moments that may be inherent in the material itself; for example, in ferromagnets. Magnetization is not always homogeneous within a body, but rather varies between different points. Magnetization also describes how a material responds to an applied magnetic field as well as the way the material changes the magnetic field, and can be used to calculate the forces that result from those interactions. It can be compared to electric polarization, which is the measure of the corresponding response of a material to an electric field in electrostatics. Physicists and engineers define magnetization as the quantity of magnetic moment per unit volume. It is represented by a vector M.

Other articles related to "magnetization":

Magnetization Reversal By Circularly Polarized Light
... in Physical Review Letters this effect is generally called all-optical magnetization reversal ... This magnetization reversal technique refers to a method of reversing magnetization in a magnet simply by circularly polarized light and where the magnetization direction is controlled by the ... In particular, the direction of the angular momentum of the photons would set the magnetization direction without the need of an external magnetic field ...
Magnetic Anisotropy - Anisotropy Energy of A Single-domain Magnet
... is single-domain in the strictest sense the magnetization is uniform and rotates in unison ... moment is and the volume of the particle is, the magnetization is, where is the saturation magnetization and are direction cosines (components of a unit ...
Curie's Law - Derivation With Quantum Statistical Mechanics - Two-state (spin-1/2) Particles
... If so, then such a particle has only two possible energies and When one seeks the magnetization of a paramagnet, one is interested in the likelihood of a particle to align itself with the ... In other words, one seeks the expectation value of the magnetization where the probability of a configuration is given by its Boltzmann factor, and the partition function provides the necessary normalization ... Let's see what happens to the magnetization as we specialize it to large and small ...
Magnetization Reversal
... Magnetization reversal, or switching, represents the process that leads to a 180° reorientation of the magnetization vector with respect to its initial direction, from one stable orientation to the ... As it is known today, there are only few possible ways to reverse the magnetization of a metallic magnet magnetization reversal in an applied magnetic field magnetization ...