Mössbauer investigation of amorphous-to-crystalline transformation of Fe62Ni16B14Si8 by isothermal annealing
| Autor: | M. Sorescu, I. Bibicu, D. Barb, M. S. Rogalski |
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| Rok vydání: | 1994 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Magnetic moment Annealing (metallurgy) Condensed Matter Physics Atomic and Molecular Physics and Optics Amorphous solid law.invention Magnetic anisotropy Crystallography law Ribbon Mössbauer spectroscopy Physical and Theoretical Chemistry Crystallization Hyperfine structure |
| Zdroj: | Hyperfine Interactions. 94:2187-2192 |
| ISSN: | 1572-9540 |
| DOI: | 10.1007/bf02063760 |
| Popis: | Room temperature transmission Mossbauer spectra of Fe62Ni16B14Si8 ribbons, annealed in vacuum for time periods ranging from 5 to 60 minutes at the crystallization temperatureT x=720 K, have been used to investigate the crystallization mechanism by isothermal annealing. Reorientation of the magnetic anisotropy almost normal to the ribbon plane was observed and correlated to the annealing time dependence of the mean hyperfine field (HF) of the amorphous component. Crystallization started at the surface before the bulk and was found to occur in two steps: a metastable equilibrium of the amorphous phase with (FeNi), (FeNi)Si and t-(FeNi)3B, followed by the decomposition of t-(FeNi)3B into t-(FeNi)2B and (FeNi). The increase of the mean magnetic moment at the Fe sites as compared to related iron-based alloys was attributed to compositional small Ni additions. |
| Databáze: | OpenAIRE |
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