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A Comparative Study of Pulsed Laser And Electron Beam Irradiation Effects In Fe81B13.5Si3.5C2 Glass

Published online by Cambridge University Press:  21 February 2011

Monica Sorescu ,
E. T. Knobbe  and
D. Barb
Monica Sorescu
Affiliation:
Oklahoma State University, Department of Chemistry, Stillwater, Oklahoma 74078-0447
E. T. Knobbe
Affiliation:
Oklahoma State University, Department of Chemistry, Stillwater, Oklahoma 74078-0447
D. Barb
Affiliation:
Institute of Atomic Physics, P.O. Box MG/7, R 76900 Bucharest-Magurele, Romania
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Abstract

Samples of Fe81B13.5Si3.5C2 metallic glass were irradiated with a pulsed excimer laser (λ=308 nm, τ=10 ns), with a high-energy electron beam (W=7 MeV), and with low-energy electron beams (W=30 and 50 keV). Irradiation-driven changes in the magnetic anisotropy and phase equilibrium of alloy samples were studied by Mössbauer spectroscopy and scanning electron microscopy. Pulsed-excimer-laser irradiation was found to induce controlled magnetic anisotropy without onset of bulk crystallization in the Fe81B13.5Si3.5C2 amorphous system. High-energy electron-beam irradiation determined an out-of-plane magnetic anisotropy due to changes in the chemical short-range order. Low-energy electron-beam irradiation resulted in the formation of crystalline regions, in which α-Fe, Fe-Si, Fe3B, Fe2B, and clusters of γ-Fe were identified. Interpretation of these results is given in terms of radiation-enhanced diffusion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 354: Symposium A – Beam Solid Interactions for Materials Synthesis and Characterization , 1994 , 693
Copyright
Copyright © Materials Research Society 1995

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