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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
In the range of [x.sub.p] = =0~1.1 mm, the reluctance increases due to the magnetic saturation near the valve's core cone.
The EPR spectra show that the value of the resonant field and line width corresponds to the value of the magnetic saturation. In this work, a new method of synthesis of combustion is the nanoferrite used to produce Ni-Zn.
Meanwhile, form the Figure.4 (c), the torque ripple mainly include the 6-th and the 12-th harmonic components due to the cogging torque and magnetic saturation. The error of ripple amplitudes and phases is controlled under 3%.
The paper is organized as follows: Section 2 describes the model of a series DC motor without magnetic saturation. Section 3 presents the identification of the series DC motor together with a description of the experimental setup based on the classical control transient response analysis.
A search algorithm for an optimum voltage vector that uses effective magnetic saturation without rotating the rotor was introduced in [23].
They suggested that the origins of the reduction may be due to a lack of magnetic saturation. However, this is unlikely to be the case for our study conducted in a field of 4 T.
[40] we assumed for the GB-phase a magnetic saturation polarization [J.sub.s] of 0.43 T and calculated an exchange stiffness constant A of 1.0 pJ/T.
In technical literature since the calculation method for different values of capacitors are known [1, 2], but these methods are not sufficient accuracy, since not adequately take into account factors such as asymmetry of power magnetic saturation and displacement current.
8, the MR effects increased with increasing magnetic flux density and magnetic saturation was reached at about 560 mT.
2, which is due to the negligible magnetic saturation, i.e., low value of the phase current.
To minimize magnetic saturation we have to fix the same values of magnetic flux during each switching time interval.

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