Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8157909 | Journal of Magnetism and Magnetic Materials | 2013 | 4 Pages |
Abstract
Effect of elemental substitution of M (M=C, Cu, Ga, Al and Si) for Zr on the magnetic properties, phase evolution, and microstructure of melt spun Co80Zr18âxMxB2 (x=0-2) ribbons have been investigated. The x-ray diffraction (XRD) and thermal magnetic analysis (TMA) results showed that two magnetically soft phases, namely fcc-Co and Co23Zr6, coexisted with hard phase Co5Zr in Co80Zr17M1B2 ribbons with M=Cu, Ga, Al and Si, while an extra unknown magnetic phase was present in ribbons with M=C. The ribbons with M=C and Si were found to improve the remanence (Ïr) of the Co80Zr17M1B2 ribbons. However, only M=Si could improve the whole magnetic properties, including Br, intrinsic coercivity (iHc) and energy product ((BH)max) of the above ribbons. The optimal magnetic properties of Br=5.2Â kG, iHc=4.5Â kOe, and (BH)max=5.3Â MGOe were obtained in Co80Zr17Si1B2 ribbons, which possessed Co5Zr and minor fcc-Co phases with much finer grain size (10-30Â nm) in comparison with its counterpart Co80Zr18B2 (20-60Â nm).
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H.W. Chang, C.F. Tsai, C.C. Hsieh, C.W. Shih, W.C. Chang, C.C. Shaw,