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coercivity

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coercivity

[‚kō·ər′siv·əd·ē]
(electromagnetism)
The coercive force of a magnetic material in a hysteresis loop whose maximum induction approximates the saturation induction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

coercivity

On magnetic media, the amount of electrical energy required to change the polarization of a bit. The coercivity of hard disks ranges from 500 to 2,000 Oersted. On magneto-optic media, it takes between 5,000 to 10,000 Oersted. See Oersted.
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References in periodicals archive
Missell, "The 5: 17 phase in Sm-Nd-Fe," in Proceeding of the 8th International Symposium on Magnetic Anisotropy and Coercivity, C.
Let us note that the coercivity and continuity conditions are sufficient but not necessary as is shown in the forthcoming examples.
Liu et al., "Exchange-coupling interaction, effective anisotropy and coercivity in nanocomposite permanent materials," Journal of Applied Physics, vol.
The boundedness of {[u.sup.n]} is a consequence of the decrease of {[THETA]([u.sup.n])}, the weak coercivity of [THETA], i.e., [THETA](u) [right arrow] [infinity] as [parallel]u[parallel] [right arrow] [infinity], and Condition 2 of Assumption 2.
Coercivity ([H.sub.C]) is the reverse field required to reduce the magnetization to zero from saturation magnetization.
Banks generally use lo-co tape for ATM cards, although many are now moving to medium coercivity (mid-co) for better data retention.
Since coercivity is measured and rated as a bulk property of magnetic media, it is an average property with contributions from individual particles of the media.
which is nonnegative because of the coercivity of [O.sup.n].
Neodymium plays an important role in maintaining high coercivity (the ability to maintain magnetization) and heat resistance.
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