Influence of High Energy Heavy Ions on Magnetic Susceptibility of Soft Magnetic Metallic Glasses

M. Pavloviča, M. Miglierinia,b, E. Mustafinc, T. Seidlc,d, M. Šokae, W. Ensingerd aInstitute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovičova 3, 812 19 Bratislava, Slovakia bRegional Centre of Advanced Technologies and Materials, Palacky University, 17. listopadu 12, 771 46 Olomouc, Czech Republic cGSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 642 91 Darmstadt, Germany dDarmstadt University of Technology, Karolinenplatz 5, 642 89 Darmstadt, Germany eInstitute of Electrical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovičova 3, 812 19 Bratislava, Slovakia

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This contribution presents experimental data concerning the influence of fast heavy ions on magnetic susceptibility of VITROVAC®6025 and VITROPERM®800 metallic glasses. Samples of magnetic ribbons were irradiated with Au, and Ta ions at 11.1 MeV/A (energy per nucleon), and U ions at 5.9 MeV/A. The irradiation fluences varied from 5×1010 up to 1.2×1013 ions/cm2. Relative change of the samples' magnetic susceptibility after and before irradiation was measured and evaluated as a function of the irradiation fluence. Measurements were done with a commercial Kappa-bridge device. We observed that VITROPERM® showed less change of magnetic susceptibility in comparison with VITROVAC® and this change occurred at higher fluences. This indicates higher radiation hardness of VITROPERM® compared with VITROVAC® against high-energy heavy ions. In addition, heavier ions caused larger change of magnetic susceptibility than the lighter ones and the effect could be roughly scaled with the level of electronic stopping.

DOI: 10.12693/APhysPolA.126.54 PACS numbers: 61.80.Jh, 61.82.Bg, 75.30.Cr, 75.47.Np, 75.50.Kj