Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy
In this study we present the results on structural relaxation of the Co70Fe5Si10B15 amorphous alloy investigated by measuring the thermo-electromotive force (TEMF) during isothermal annealing (for 600 s). A mechanical junction of the investigated alloy and a copper conductor has been constructed for...
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International Institute for the Science of Sintering, Beograd
2004-01-01
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doaj-d94ab3604f0241d1bc9315f294c0a17d2020-11-24T23:44:00ZengInternational Institute for the Science of Sintering, BeogradScience of Sintering0350-820X2004-01-0136319720310.2298/SOS0403197MInfluence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloyMaričić Aleksa M.Minić-Popović Dragica M.Zak T.In this study we present the results on structural relaxation of the Co70Fe5Si10B15 amorphous alloy investigated by measuring the thermo-electromotive force (TEMF) during isothermal annealing (for 600 s). A mechanical junction of the investigated alloy and a copper conductor has been constructed for measuring the thermo-electromotive force (ε). Annealing was performed at temperatures T1 = 430˚C, T2=460˚C and T3=480˚C which are about 50 to 100˚C lower than the crystallization temperature. At these temperatures structural relaxation occurred only in the amorphous alloy. The activation energy E=224 kJ/mol and rate constants k1=6.66·10-5 s-1 k2=33·10-5 s-1 and k3=76·10-5 s-1 at temperatures T1, T2 and T3 respectively, have been determined for the process. Each isothermal annealing has been followed by determination of the relative change of the electronic state density at the Fermi level as Dn1/n=2.36%, Dn2/n =3.21% and Dn3/n= 9.80%, respectively. . http://www.doiserbia.nb.rs/img/doi/0350-820X/2004/0350-820X0403197M.pdfAmorphous alloyFree electron densityElectrical propertiesMagnetic properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maričić Aleksa M. Minić-Popović Dragica M. Zak T. |
spellingShingle |
Maričić Aleksa M. Minić-Popović Dragica M. Zak T. Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy Science of Sintering Amorphous alloy Free electron density Electrical properties Magnetic properties |
author_facet |
Maričić Aleksa M. Minić-Popović Dragica M. Zak T. |
author_sort |
Maričić Aleksa M. |
title |
Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy |
title_short |
Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy |
title_full |
Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy |
title_fullStr |
Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy |
title_full_unstemmed |
Influence of the changes of free electron density on electrical and magnetic properties of the CO70Fe5Si10B15 amorphous alloy |
title_sort |
influence of the changes of free electron density on electrical and magnetic properties of the co70fe5si10b15 amorphous alloy |
publisher |
International Institute for the Science of Sintering, Beograd |
series |
Science of Sintering |
issn |
0350-820X |
publishDate |
2004-01-01 |
description |
In this study we present the results on structural relaxation of the Co70Fe5Si10B15 amorphous alloy investigated by measuring the thermo-electromotive force (TEMF) during isothermal annealing (for 600 s). A mechanical junction of the investigated alloy and a copper conductor has been constructed for measuring the thermo-electromotive force (ε). Annealing was performed at temperatures T1 = 430˚C, T2=460˚C and T3=480˚C which are about 50 to 100˚C lower than the crystallization temperature. At these temperatures structural relaxation occurred only in the amorphous alloy. The activation energy E=224 kJ/mol and rate constants k1=6.66·10-5 s-1 k2=33·10-5 s-1 and k3=76·10-5 s-1 at temperatures T1, T2 and T3 respectively, have been determined for the process. Each isothermal annealing has been followed by determination of the relative change of the electronic state density at the Fermi level as Dn1/n=2.36%, Dn2/n =3.21% and Dn3/n= 9.80%, respectively. . |
topic |
Amorphous alloy Free electron density Electrical properties Magnetic properties |
url |
http://www.doiserbia.nb.rs/img/doi/0350-820X/2004/0350-820X0403197M.pdf |
work_keys_str_mv |
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