Magnetic Force Microscopy Study of Zr2Co11-Based Nanocrystalline Materials: Effect of Mo Addition

Authors

Lanping Yue, University of Nebraska - LincolnFollow
Yunlong Jin, University of Nebraska - Lincoln
Wenyong Zhang, University of Nebraska - Lincoln
David J. Sellmyer, University of Nebraska - LincolnFollow

Date of this Version

2015

Citation

Journal of Nanomaterials Volume 2015, Article ID 151740, 5 pages

Comments

Copyright © 2015 Lanping Yue et al.

Open access

http://dx.doi.org/10.1155/2015/151740

Abstract

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 ≤ 1.5). The maximum energy product (𝐵𝐻)_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 Φ_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.