demagnetizing field

demagnetizing field

[dē′mag·nə‚tīz·iŋ ‚fēld]
(electromagnetism)
An additional magnetic field that is produced in a magnetic material subject to an applied magnetic field, due to the magnetic material itself.
References in periodicals archive ?
Also, a demagnetizing field prior to pulse excitation is necessary to prevent the accumulation of a magnetic field inside the core material.
This applies a strong demagnetizing field upon the magnet, which will tend to be demagnetized.
Local changes of the exchange coupling between grains and the decrease of the anisotropy field and demagnetizing field at/near intergranular phases considerably reduce the overall coercive field.
A proper design of a magnetofluidic device implies detailed data on various properties of magnetic fluids, including the static magnetic ones, studied by applying the demagnetizing field correction.
In addition, it is shown in [16] that errors arising due to approximate computation of field contributions like, e.g., the demagnetizing field, do not affect the unconditional convergence.
Gilbert pointed out in the appendix of [9,10] that H is not limited to the externally applied field and he gives the definitions of the demagnetizing field, the exchange fields, the anisotropy fields, and the magnetoelastic fields in terms of the concomitant energies.
One of the causes of body deformation is the effect of magnetostatics, which causes the sample to elongate along the applied magnetic field (a uniform field in this case) to minimize the demagnetizing field opposing the applied field.
Computationally the calculation of the demagnetizing field [H.sub.mag] is the most intensive part of the simulation.
Surface modification changes feature of the demagnetizing field as small naturally formed defect corresponding to rapid solidification are removed but new defects in the shape of indentations are formed.
The behavior of magnetic materials can be evaluated by graphical representation, which measures the magnetic induction and magnetization as a function of a magnetizing or demagnetizing field [15].