Journal
JOURNAL OF APPLIED PHYSICS
Volume 105, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3075581
Keywords
amorphous magnetic materials; atomic force microscopy; boron alloys; coercive force; ion beam effects; ion-surface impact; iron alloys; magnetic thin films; molybdenum alloys; nickel alloys; surface magnetism; surface roughness; vacuum deposition; X-ray diffraction
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Funding
- Inter University Accelerator Centre New Delhi, India through UGC Funded University Project (UFUP) [35306]
- CSIR, New Delhi
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Fe-Ni based amorphous thin films were prepared by thermal evaporation. These films were irradiated by 108 MeV Ag8+ ions at room temperature with fluences ranging from 1x10(12) to 3x10(13) ions/cm(2) using a 15 UD Pelletron accelerator. Glancing angle x-ray diffraction studies showed that the irradiated films retain their amorphous nature. The topographical evolution of the films under swift heavy ion (SHI) bombardment was probed using atomic force microscope and it was noticed that surface roughening was taking place with ion beam irradiation. Magnetic measurements using a vibrating sample magnetometer showed that the coercivity of the films increases with an increase in the ion fluence. The observed coercivity changes are correlated with topographical evolution of the films under SHI irradiation. The ability to modify the magnetic properties via SHI irradiation could be utilized for applications in thin film magnetism.
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