title: 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-xMo1.5Bxribbons prepared by arc melting and melt spinning is investigated. Microstructure analysis show that the ribbons consist of a hard-magnetic rhombohedral Zr2Co11phase 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 Zr2Co11unit 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 forx= 1, are a saturation magnetization of 7.8 kG, a coercivity of 5.4 kOe, and a maximum energy product of 4.1 MGOe.
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Nebraska Center for Materials and Nanoscience, University of Nebraska , Lincoln, NE 68588, USA.
authors.forename: Wenyong
authors.initials: W
authors.lastname: Zhang
authors.forename: Parashu R
authors.initials: PR
authors.lastname: Kharel
authors.affiliation: Nebraska Center for Materials and Nanoscience, University of Nebraska , Lincoln, NE 68588, USA.
authors.forename: Shah R
authors.initials: SR
authors.lastname: Valloppilly
authors.affiliation: Nebraska Center for Materials and Nanoscience, University of Nebraska , Lincoln, NE 68588, USA.
authors.forename: Ralph
authors.initials: R
authors.lastname: Skomski
authors.forename: David J
authors.initials: DJ
authors.lastname: Sellmyer