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Browse Journals & Magazines > Applied Physics Letters ...> Volume:76 Issue:8 Help

Melt-spun precipitation-hardened Sm2(Co, Cu, Fe, Zr)17 magnets with abnormal temperature dependence of coercivity

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4 Author(s)
Goll, D. ; Max-Planck-Institut für Metallforschung, Heisenbergstr. 1, D-70569 Stuttgart, Germany ; Kleinschroth, I. ; Sigle, W. ; Kronmuller, H.

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Rapidly quenched Sm(CobalCu0.08Fe0.22Zr0.02)8.5 (Cu-/Fe-rich) and Sm(CobalCu0.05Fe0.10Zr0.03)8.5 (Cu-/Fe-poor) ribbons have been prepared by means of the melt-spinning technique. By applying an appropriate annealing procedure a microstructure similar to that of sintered magnets can be obtained. The energy dispersive x-ray microanalysis of the compositional dependence near the cell boundaries suggests a model for the profile of the crystal anisotropy constants responsible for the magnetic hardening. The Cu-/Fe-rich alloy shows a normal temperature dependence of coercivity with a negative temperature coefficient, but the Cu-/Fe-poor ribbons show a positive temperature coefficient in the temperature range from 400–700 K. The different temperature coefficients are discussed in terms of a pinning model. © 2000 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:76 ,  Issue: 8 )

Date of Publication: Feb 2000

Page(s):
1054 - 1056
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.125936
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Feb 2000

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