Open AccessEffect of boron doping on nanostructure and magnetism of rapidly quenched Zr2Co11-based alloys
Author(s) -
Yunlong Jin,
Wenyong Zhang,
Parashu Kharel,
Shah Valloppilly,
Ralph Skomski,
D. J. Sellmyer
Publication year - 2016
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4942556
Subject(s) - coercivity , materials science , microstructure , magnetism , grain size , boron , condensed matter physics , magnetic hysteresis , magnet , phase (matter) , melt spinning , magnetization , antiferromagnetism , nuclear magnetic resonance , metallurgy , magnetic field , composite material , chemistry , spinning , physics , organic chemistry , quantum mechanics
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
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