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Huge magnetic hardening ascribed to metastable crystallites during first stages of devitrification of amorphous FeSiBNbSn alloys

Published online by Cambridge University Press:  31 January 2011

V. Cremaschi ,
B. Arcondo ,
H. Sirkin ,
M. Vázquez ,
A. Asenjo ,
J. M. Garcia ,
G. Abrosimova  and
A. Aronin
V. Cremaschi
Affiliation:
Fac. Ingenieria, Universidad de Buenos Aires, Paseo Colon 850, 1063 Capital Federal, Argentina
B. Arcondo
Affiliation:
Fac. Ingenieria, Universidad de Buenos Aires, Paseo Colon 850, 1063 Capital Federal, Argentina
H. Sirkin
Affiliation:
Fac. Ingenieria, Universidad de Buenos Aires, Paseo Colon 850, 1063 Capital Federal, Argentina
M. Vázquez
Affiliation:
Instituto de Magnetismo Aplicado and Instituto de Ciencia de Materiales, P.O. Box 155, 28230 Las Rozas (Madrid), Spain
A. Asenjo
Affiliation:
Instituto de Magnetismo Aplicado and Instituto de Ciencia de Materiales, P.O. Box 155, 28230 Las Rozas (Madrid), Spain
J. M. Garcia
Affiliation:
Instituto de Magnetismo Aplicado and Instituto de Ciencia de Materiales, P.O. Box 155, 28230 Las Rozas (Madrid), Spain
G. Abrosimova
Affiliation:
Institute of Solid State Physics, RAS 142432, Chernogolovka, Russia
A. Aronin
Affiliation:
Institute of Solid State Physics, RAS 142432, Chernogolovka, Russia
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Abstract

A huge magnetic hardening (i.e., increase of coercivity from 5 A/m up to 4.4 kA/m) was reported for Fe75Si11B10Nb3Sn alloy ribbons during their very first stage of crystallization from an initial amorphous state. In contrast, Fe78Si11B10Sn1 showed no such hardening, while a moderate hardening was observed for Fe76Si11B10Nb3. This outstanding change was ascribed to the generation of metastable nanocrystallites that disappear upon heating at higher temperatures. A noticeable softening was then recovered (with a decrease of coercivity down to 0.8 kA/m) once the optimum homogeneous conventional nanocrystalline phase was achieved. Both structure and magnetic evolutions are followed by different techniques.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 9 , September 2000 , pp. 1936 - 1942
Copyright
Copyright © Materials Research Society 2000

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References

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