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Interaction of Alpha Particle Beams with Fe-Based and FeNi-Based Glassy Ferromagnets

Published online by Cambridge University Press:  21 February 2011

Monica Sorescu  and
D. Barb
Monica Sorescu
Affiliation:
Duquesne University, Physics Department, Pittsburgh, Pennsylvania 15282
D. Barb
Affiliation:
Institute of Atomic Physics, Bucharest-Magurele, Romania 76900
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Abstract

Samples of Fe78B13Si9 and Fe40Ni38Mo4B18 metallic glasses were irradiated with alpha particle beams (W=2.8 MeV) using radiation doses of 1016 and 1017 cm-2. Irradiation-induced effects on the magnetic texture and phase composition of alloy samples were studied by Mössbauer spectroscopy. Related morphological changes and resultant crystalline precipitates were characterized by scanning electron microscopy. The evolution of phases and microstructure during the radiation-induced amorphous-to-crystalline transformation was found to depend on the particle flux and sample composition. The lowest radiation dose employed was found to be more effective in inducing amorphous-to-crystalline transformations in both ferromagnetic alloys studied. In addition, the FeNi-based amorphous system investigated was found to be more stable than the Fe-based metallic glass, exposed to the same particle-beam irradiation conditions. By stimulating unconventional pathways for the crystallization process, the interaction of alpha particle beams with glassy ferromagnets offers unique opportunities to understand the fundamentals of nucleation and growth in amorphous magnets.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 396: Symposium A – Ion-Solid Interactions for Materials Modification and Processing , 1995 , 185
Copyright
Copyright © Materials Research Society 1996

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