coercivity


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Related to coercivity: retentivity

co·er·civ·i·ty

 (kō′ər-sĭv′ĭ-tē)
n.
The magnetic field intensity needed to reduce the magnetization of a ferromagnetic material from complete saturation to zero, usually measured in teslas.

coercivity

(ˌkəʊɜːˈsɪvɪtɪ)
n
(General Physics) the magnetic-field strength necessary to demagnetize a ferromagnetic material that is magnetized to saturation. It is measured in amperes per metre. Compare coercive force

co•er•civ•i•ty

(ˌkoʊ ərˈsɪv ɪ ti)

n.
the magnetic intensity needed to reduce to zero the magnetic flux density of a fully magnetized magnetic specimen or to demagnetize a magnet.
[1895–1900]
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References in periodicals archive ?
The resultant Sm-Fe-N/Co-B composite powder acted as one single hard magnetic powder and exhibited a larger coercivity of 0.45 MA/m and a higher remanence of 93.1 Am /kg than the mixture of Sm-Fe-N powder and Co-B powder.
Dividing both sides by [[parallel][S.sup.2]x[parallel].sup.2.sub.A] yields the desired coercivity bound,
Moreover, our analysis requires that the operator L, or more exactly the bilinear form (Lu, v), satisfies the coercivity condition
Assuming that the identification of easy axes by maxima in the coercivity is universal and can thus be used for all cases under examination, even an exchange of easy and hard axes of the systems, resulting from different couplings between the pairs of nanowires, can be recognized.
Similar with those by P123, the magnetic properties of Ni nanotube arrays assisted by PEG2000 show an enhanced coercivity in comparison to bulk nickel (around 0.7 Oe for Ni), indicating that the polymers used do not have significant influence on the magnetic behaviors of Ni nanotubes.
Tape media to date has had the magnetic coating somewhat thick (0.5[micro]m or more) compared to these dimensions combined with moderate magnetic coercivity which yields broad written transitions due to the generation of transitions curving into the depth of the magnetic coating and the demagnetizing effect of sizeable opposing magnetic regions.
With the applied field oriented in the [1,1,1] direction relative to the principle axes of the bar, the problem is to calculate the remnant magnetization and coercivity of the bar as a function of the bar width.
The [Sm.sub.2][Co.sub.17] alloy with 2:17R or 1:7H structure almost has no coercivity and remanence.
It can be found that the saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) are 13.6emu/g, 0.016 emu/g and 92.6 Oe, respectively, showing soft ferromagnetic behaviour.
This yields a large difference in coercivity between two FM electrodes.
In its latest breakthrough, Toshiba has now developed a high-iron samarium-cobalt magnet that realizes high level demagnetization resistance at 180C, outperforms neodymium magnets at 140C, and that, due to application of Toshiba-developed heat treatment, offers 30% better coercivity than the magnet developed in 2012.
The Ag/Co multilayer nanowires had almost the same coercivity Hc of 210 Oe but showed obvious magnetic anisotropy and lower saturation magnetization (Ms) than the pure Co nanowires.