| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,906,599,491 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Coercive Force |
Also found in: Dictionary/thesaurus, Wikipedia | 0.01 sec. |
|
|
coercive force [kō′ər·siv ′fȯrs]
(electromagnetism) The magnetic fieldHwhich must be applied to a magnetic material in a symmetrical, cyclicly magnetized fashion, to make the magnetic inductionBvanish. Also known as magnetic coercive force. Coercive Force one of the characteristics of the phenomenon of hysteresis. In magnetic hysteresis the coercive force is the magnetic field intensity at which a ferromagnetic specimen that has been initially magnetized to saturation becomes demagnetized. A distinction is made between the coercive force JHc (or Hc) and the force BHc, when the magnetization J of the specimen or the magnetic induction B in the specimen becomes zero. Coercive forces are measured by means of coercimeters. The values for ferromagnetic materials vary over a wide range, from 10-3 to 104 oersteds, or 8 x 10-2 to 8 x 105 amperes per meter (A/m). For a given magnetic material the coercive force depends to a large extent on the preparation of the specimen and on its treatment, as well as on external conditions, such as temperature. According to the magnitude of the coercive force, magnetic materials are customarily divided into magnetically soft materials (small Hc) and magnetically hard materials (large Hc). The value of the coercive force is determined by the factors that oppose remagnetization of the specimen. The presence of impurities, lattice defects, and various types of inhomogeneities in a specimen hinders the movement of domain walls and thus increases Hc. Particularly high values of coercive force (103–104 oersteds) are achieved by single-domain ferromagnetic particles (with substantial magnetic anisotropy). The coercive force of ferroelectric materials is considered to be like that of ferromagnetic materials. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Mentioned in | ? | References in periodicals archive | ? | Encyclopedia browser | ? | Full browser | ? | |||
|---|---|---|---|---|---|---|---|---|---|---|
No references found | Simultaneously, China aggressively modernized its military and fundamentally altered how it could apply coercive force against Taiwan and against any intervening forces. Have we, for example, fully faced the moral ambiguities involved in the establishment of Christianity as an imperial religion by the Theodosian Code--the accommodation of the lifestyles of the wealthy and powerful it required, the persecution of non-Christians deemed reasonable, and the sanctioning of coercive force in Jesus' name? It is not a question of whether people have a right to do immoral things, like use cocaine or LSD, but rather a question of whether the effort to use the coercive force of the law will be futile or even counterproductive. |
Coercive Force |
coercere coerces coerces coercible coercible coercimeter coercimeter coercing coercing coercion coercion coercion coercion Coercion (disambiguation) Coercion (disambiguation) coercionary coercionary coercionary coercionary coercions coercions coercions coercions coercitio Coercitive coercive coercive coercive coercive Coercive Acts Coercive Force Coercive functionCoercive labor system Coercive labor system Coercive labor system Coercive labor system coercive refusal to furnish work Coercive violene Coercive violene Coercive violene Coercive violene coercively coercively coerciveness coerciveness coercivity coercivity COERE Coereba Coerebidae Coerebidae Coeroeni COERR COERS Coersion Coersion Coersion Coersion coerulein coeruleolactite Coerulignone | |||||||
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|