Magnetic Saturation

magnetic saturation

[mag′ned·ik ‚sach·ə′rā·shən]
(electromagnetism)
The condition in which, after a magnetic field strength becomes sufficiently large, further increase in the magnetic field strength produces no additional magnetization in a magnetic material. Also known as saturation.

Magnetic Saturation

 

the state of a paramagnet or ferromagnet in which its magnetization J has reached a maximum value J, the saturation magnetization, which does not change upon further increase in the intensity of the magnetizing field.

For ferromagnets J is reached upon completion of the processes of “technical magnetization”: (1) growth of domains whose magnetic moments are oriented along the direction of easy magnetization as a result of displacement of the domain boundaries; (2) rotation of the magnetization vector of a specimen in the direction of the magnetizing field (the rotation process); (3) the paraprocess, which is the increase, under the influence of a strong external field, in the number of spins oriented along the field at the expense of spins that have an antiparallel orientation. In practice, technical magnetic saturation is usually produced (at 20°C in fields ranging from several oersteds to about 104 oersteds), since very strong fields are required to produce the paraprocess (far from the Curie point). A condition close to magnetic saturation is reached for paramagnets in fields of the order of 10 kilooersteds (about 103 kiloamperes per meter) at temperatures of the order of 1°K.

REFERENCES

Kirenskii, L. V. Magnetizm, 2nd ed. Moscow, 1967.
Vonsovskii, S. V. Magnetizm. Moscow, 1971.
References in periodicals archive ?
With increasing external magnetic field, the particle eventually will reach magnetic saturation thereafter the magnetic force will be proportional only to the magnetic field gradient [6].
4 (c), the torque ripple mainly include the 6-th and the 12-th harmonic components due to the cogging torque and magnetic saturation.
Numerical methods for the calculation of the magnetic fields are removed restrictions on the account of actual constructive shapes of electric machines as a whole and their elements, on account of the magnetic saturation.
Linarite was a good choice for experimental purposes because it is a single crystal and reaches magnetic saturation (Msat) at 10 Tesla (T), a much lower field than the Msat of 44 T for lithium copper vanadate.
But too large flux density in PM will make the ferromagnetic pole pieces subject to magnetic saturation and interfere with the overall electromagnetic compatibility of GMM devices [13]; moreover, specimen of PM with larger remanent flux density is not so easy to approach in commercial market; the aspect ratio of GMM relates to the field evenness, but this factor is determined by the total strain and block force requirement of GMM devices.
8, the MR effects increased with increasing magnetic flux density and magnetic saturation was reached at about 560 mT.
To minimize magnetic saturation we have to fix the same values of magnetic flux during each switching time interval.
In addition to high magnetic saturation properties, the produced nanoparticles have perfect chemical stability and very good corrosion resistance.
Fe3O4 nanoparticles (NPs) have been the most widely used adsorbents in MSPE because of their super paramagnetism high magnetic saturation and simple preparation process [5].
At the top of the curve, at magnetic saturation, if the magnetizing current is stopped, the curve does not trace itself back to the origin.
The geometry of the initial design is imported from a SAT file; then electrical properties of the materials, such as permittivity and dielectric loss tangent, permeability and magnetic loss tangent, bulk electrical conductivity, and magnetic saturation are defined.

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