We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Nanocomposite R2Fe14B/α-Fe permanent magnets

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Hadjipanayis, G.C. ; Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA ; Withanawasam, L. ; Krause, R.F.

We have studied the crystallization, crystal structure, structure morphology, and magnetic properties of R6Fe87Nb 1B6 with R=Nd, Pr, Dy, Tb and Nd3.5Fe 91Nb2B3.5 melt-spun ribbons with a microstructure consisting of a mixture of exchange-coupled magnetically hard (R2Fe14B1) and soft (α-Fe) phases. The as-spun ribbons of R-rich composition crystallize in two steps; at first the Y3Fe62B14-type+α-Fe phases are formed for R=Nd, Pr, and Dy and subsequently they transform to 2:14:1 and α-Fe upon heating above 700°C. The intermediate phase in the case of Tb6Fe87Nb1B6 is of the TbCu7-type. Very high remanences up to 145 emu/g with reduced remanences, Mr/Ms, up to 0.8 were observed. The coercivity of the samples was found to vary with the R element and the content of the hard phase. The highest room temperature coercivity of 4.5 kOe was obtained in a Nd4Tb2Fe 36Nb2B6 sample. Electron microscopy reveals a grain size of 30-50 nm, which is much larger than the size (10 nm) predicted for optimum coupling

Published in:

Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 6 )