Impedance Spectroscopy and XPS Comparative Investigations of the State of Boron Atoms in an Amorphous Metallic Matrix
✍ Scribed by Iovka Dragieva; Zdravko Stoynov; Iveta Nikolaeva; Vesselin Krastev
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 251 KB
- Volume
- 133
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
The purpose of this study is to compare the investigations of amorphous magnetic ribbons combining the usual structural methods with physical impedance spectroscopy (PIS) and X-ray photoelectron spectroscopy (XPS). The samples are commercially available rapidly quenched ribbons for torroidal transformers. Two types of ribbons were thermally treated below the temperature of amorphous-crystalline phase transition. Two binding energies of B 1s electrons are determined by XPS in one of the as-quenched ribbons, which show impedance time constant spectra without dispersion. The other ribbon, possessing only one value of binding energy of the B 1s electron (B I state) in a rapidly as-quenched state, undergoes transition to a still amorphous state but acquires high electromagnetic losses and show another value of the binding energy of the B 1s electron (B II state) after the heat-treatment procedure. This latter type of ribbons show structural impedance spectra containing various time constant values.