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.
