Abstract
The modification in the magnetic anisotropy introduced by swift heavy ion irradiation has been investigated. Ferromagnetic metallic glasses Fe 78B 13Si 9 and Fe 40Ni 38Mo 4B 18 have been irradiated with 100 MeV 127I ions at different doses from 5×10 12 to 7.5×10 13 ions/cm 2. Magnetic anisotropy has been studied by measuring the relative intensity ratio D 23 of Mossbauer sextet. As received samples display orientation of the magnetic moments nearly parallel to the surface of the ribbon, which upon irradiation to a dose of 5×10 12 ions/cm 2 rotates to a nearly random orientation. At the dose of 7.5×10 13 ions/cm 2, the magnetic moments display completely random orientation.
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