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The formation of single-phase equiatomic MnBi by rapid solidification

Published online by Cambridge University Press:  31 January 2011

X. Guo ,
A. Zaluska ,
Z. Altounian  and
J. O. Ström-Olsen
X. Guo
Affiliation:
Centre for the Physics of Materials and Department of Physics, McGill University, 3600 University Street, Montréal, Québec, Canada, H3A 2T8
A. Zaluska
Affiliation:
Centre for the Physics of Materials and Department of Physics, McGill University, 3600 University Street, Montréal, Québec, Canada, H3A 2T8
Z. Altounian
Affiliation:
Centre for the Physics of Materials and Department of Physics, McGill University, 3600 University Street, Montréal, Québec, Canada, H3A 2T8
J. O. Ström-Olsen
Affiliation:
Centre for the Physics of Materials and Department of Physics, McGill University, 3600 University Street, Montréal, Québec, Canada, H3A 2T8
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Abstract

The low temperature phase (LTP) of MnBi, which is of interest because of its large magnetic anisotropy, has been obtained in almost single-phase form (>95%) by rapid solidification, followed by thermal annealing. X-ray and electron microscope studies indicate that the melt-spun ribbons are amorphous, contrary to the accepted rules for glass formation. The transformation of the amorphous phase is a complex process. The amorphous phase crystallizes first into Bi, Mn3Bi, and ferrimagnetic MnBi. The formation of the LTP begins immediately after the eutectic melting of these phases around 540 K.

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Type
Articles
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Journal of Materials Research , Volume 5 , Issue 11 , November 1990 , pp. 2646 - 2651
Copyright
Copyright © Materials Research Society 1990

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References

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