Magnetic Force Microscopy Study of ${\text{Zr}}_{\text{2}}{\text{Co}}_{\text{11}}$ -Based Nanocrystalline Materials: Effect of Mo Addition

Journal Article · Thu Jan 01 00:00:00 EST 2015 · Journal of Nanomaterials

DOI:https://doi.org/10.1155/2015/151740· OSTI ID:1209153

Yue, Lanping ; Jin, Yunlong ; Zhang, Wenyong; Sellmyer, David J.

The addition of Molybdenum was used to modify the nanostructure and enhance coercivity of rare-earth-free Zr₂Co₁₁-based nanocrystalline permanent magnets. The effect of Mo addition on magnetic domain structures of melt spun nanocrystalline Zr₁₆Co_84-xMo_x( $x=0$, 0.5, 1, 1.5, and 2.0) ribbons has been investigated. It was found that magnetic properties and local domain structures are strongly influenced by Mo doping. The coercivity of the samples increases with the increase in Mo content ( $x\le 1.5$). The maximum energy product ${\left(BH\right)}_{\text{max}}$increases with increasing $x$from 0.5 MGOe for $x=0$to a maximum value of 4.2 MGOe for $x=1.5$. The smallest domain size with a relatively short magnetic correlation length of 128 nm and largest root-mean-square phase shift ${\Phi }_{\text{rms}}$value of 0.66° are observed for the $x=1.5$. The optimal Mo addition promotes magnetic domain structure refinement and thus leads to a significant increase in coercivity and energy product in this sample.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-07CH11358
• OSTI ID: 1209153
• Journal Information: Journal of Nanomaterials, Journal Name: Journal of Nanomaterials Vol. 2015; ISSN 1687-4110
• Publisher: Hindawi Publishing Corporation
• Country of Publication: Egypt
• Language: English