Effect of boron doping on nanostructure and magnetism of rapidly quenched Zr2Co11-based alloys

Abstract

The role of B on the microstructure and magnetism of Zr16Co82.5-xMo1.5Bx ribbons prepared by arc melting and melt spinning is investigated. Microstructure analysis show that the ribbons consist of a hard-magnetic rhombohedral Zr2Co11 phase and a minor amount of soft-magnetic Co. We show that the addition of B increases the amount of hard-magnetic phase, reduces the amount of soft-magnetic Co and coarsens the grain size from about 35 nm to 110 nm. There is a monotonic increase in the volume of the rhombohedral Zr2Co11 unit cell with increasing B concentration. This is consistent with a previous theoretical prediction that B may occupy a special type of large interstitial sites, called interruption sites. The optimum magnetic properties, obtained for x = 1, are a saturation magnetization of 7.8 kG, a coercivity of 5.4 kOe, and a maximum energy product of 4.1 MGOe.

Boron‐Doped Ni‐Ru Supported on Nitrogen‐Doped Ordered Mesoporous Carbon as Effective Electrocatalyst for Methanol Electrooxidation

“…The broad amorphous nature of the obtained peaks can be associated with the existence of amorphous boron doping as recorded in previous literature. [25][26][27] Moreover, since no additional peaks corresponding to the precursors are obtained in the diffraction pattern, it confirms the complete conversion of the precursors to form products.…”

Synergistic computational and experimental discovery of novel magnetic materials

“…11D. 21,[80][81][82][83][84][85][86] The saturation magnetic polarization of these bulk alloys decreases upon alloying with boron, but H c increases significantly (Fig. 11D), and this subsequently improves their energy products as discussed in Section 4.…”

Рентгенодифракционное исследование тонких металлических пленок с магнитными слоями сплава Fe-Cr-Co

“…Fe-Cr-Co alloys can be mechanically shaped or cut. The production of Fe-Cr-Co based magnets involves thermal treatment in a magnetic fi eld, during which crystalline anisotropy of the a 1 -phase develops, which results in high coercivity [7]. The higher the magnetic fi eld during the annealing in a magnetic fi eld, the higher the coercivity during the subsequent stepped annealing [8].…”