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Saturation puts a practical limit on the maximum magnetic fields achievable in ferromagnetic-core electromagnets and transformers of around 2 T, which puts a limit on the minimum size of their cores. This is one reason why high power motors, generators, and utility transformers are physically large; to conduct the large amounts of magnetic flux ...
The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains.In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it doesn't.
Ferromagnetism is a property of certain materials ... To demagnetize a saturated magnet, a magnetic field must be applied. ... This definition is still in common use. [3]
The downward curve after saturation, along with the lower return curve, form the main loop. The intercepts h c and m rs are the coercivity and saturation remanence . When ferrimagnets are exposed to an external magnetic field, they display what is called magnetic hysteresis , where magnetic behavior depends on the history of the magnet.
However, it might be in a single-domain state except during reversal. Often particles are considered single-domain if their saturation remanence is consistent with the single-domain state. More recently it was realized that a particle's state could be single-domain for some range of magnetic fields and then change continuously into a non ...
The article Ferromagnetic material properties is intended to contain a glossary of terms used to describe ... After magnetization to saturation, a value of field ...
Coercivity in a ferromagnetic material is the intensity of the applied magnetic field (H field) required to demagnetize that material, after the magnetization of the sample has been driven to saturation by a strong field. This demagnetizing field is applied opposite to the original saturating field.
In this case, the interaction field is = where is the saturation magnetization at 0K. Later, the quantum theory made it possible to understand the microscopic origin of the Weiss field. The exchange interaction between localized spins favored a parallel (in ferromagnets) or an anti-parallel (in anti-ferromagnets) state of neighboring magnetic ...