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Magnetic and microstructure studies of boron-enriched (Nd0.95 La0.05)11Fe76.5$ -xCo xTi2B10.5 (x=0-15) melt-spun ribbons

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4 Author(s)
Chang, W.C. ; Dept. of Phys., Chung Cheng Univ., Ming-Hsiung, Taiwan ; Wang, S.H. ; Chang, S.J. ; Chen, Q.

The magnetic properties and microstructures of rare earth lean and boron-rich (Nd0.95La0.05)11 Fe76.5-xCoxTi2B10.5 (x=0-15) melt-spun ribbons have been investigated. Two magnetic phases, namely α-Fe and R2Fe14B, were found, by thermal magnetic analysis (TMA), in all the ribbons studied. High intrinsic coercivity (iHc) and maximum energy product [(BH)max] values in the range of 14-18.7 kOe and 13.9-18.3 MGOe, respectively, have been achieved in these nanocomposites. Among compositions studied, the Co-substitutions, x⩽10, were found to be effective in increasing the Br and (BH)max, while keeping a high value of iHc. It was evidenced from transmission electron microscopy that the homogeneity, fine grain size, and high volume fraction of the R2Fe14B phase led to an increase in the iHc and maximum energy product of nanocomposites studied. The optimum magnetic properties of Br=9.4 kG, iHc=16.1 kOe and (BH)max=18.3 MGOe have been obtained on (Nd0.95La0.05 )11Febal.Co10Ti2B 10.5 ribbons after an optimum treatment

Published in:

Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )

Date of Publication:

Sep 2000

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