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Structural Modification in Amorphous Magnetic Alloys Under Thermotreatment

Published online by Cambridge University Press:  15 February 2011

Leonid V. Poperenko ,
Mykola V. Vinnichenko ,
Vasyl’ V. Vovchak ,
Iryna V. Yurgelevych  and
Sergei G. Zaichenko
Leonid V. Poperenko
Affiliation:
National Kyiv Taras Shevchenko University, Department of Physics, 6 Ave. Acad. Glushkov Kyiv 252022, Ukraine
Mykola V. Vinnichenko
Affiliation:
National Kyiv Taras Shevchenko University, Department of Physics, 6 Ave. Acad. Glushkov Kyiv 252022, Ukraine
Vasyl’ V. Vovchak
Affiliation:
National Kyiv Taras Shevchenko University, Department of Physics, 6 Ave. Acad. Glushkov Kyiv 252022, Ukraine
Iryna V. Yurgelevych
Affiliation:
National Kyiv Taras Shevchenko University, Department of Physics, 6 Ave. Acad. Glushkov Kyiv 252022, Ukraine
Sergei G. Zaichenko
Affiliation:
Institute for Metallurgy and Metal Physics, 9/23 2nd Baumanskaya St., Moscow 107005, Russian Federation
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Abstract

The experimental results of research of structural modifications in amorphous magnetic alloys (AMAs) under thermotreatment obtained by angular and spectroellipsometric methods are presented and discussed. The ductile-brittle transition was observed for the ribbons of some 3d-metal-based amorphous alloys. The relationship between the principal angle of incidence φ0 and annealing temperature Ta of alloys was obtained for the ribbons of AMAs. The observed behaviour of φ0 is connected with appearance of the novel amorphous phase’s clusters inside the surface’s layers of alloys.

The influence of melt’s overheating on the atomic and electronic structure of AMAs was studied. It was found that the increase of melt’s overheating temperature leads to the decrease of absorption index within the whole spectral range (ħω=0.5–4.38 eV). The structural anisotropy of AMAs and its changes after annealings were determined by reflectometric and ellipsometric measurements.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 335
Copyright
Copyright © Materials Research Society 1996

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