Diva, K. and Chauhan, R. S. and Kumar, Sarvesh and Chakraborty, B. R. (2011) Swift heavy ion-induced interface mixing in a Si–Nb thin film system. In: International Conference on Swift Heavy Ions in Materials Engineering and Characterization (SHIMEC 2010), OCT 06-09, 2010, Inter Univ Accelerator Ctr (IUAC), New Delhi, INDIA.

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In this work, we report the study of swift heavy ion-induced mixing at the interface of an a-Si/Nb/ a-Si (a-Si=amorphous silicon) thin film system at different fluences using two different characterization techniques: secondary ion mass spectroscopy and Rutherford backscattering spectrometry. The depth profiles of the samples of this system showed significant changes in the interface region when irradiated by 120 MeV Au ions. The fluence range was varied from 1×1013 to 1×1014 ions/cm2. Significant interface mixing has been observed in this range and was found to increase linearly with the increase in the ion fluence. Atomic force microscopy of the samples was also performed to confirm that there is no significant contribution of surface roughness. Mixing has been quantified in terms of mixing rate (k). This high energy-induced mixing effect has been explained in the framework of the thermal spike model which verifies the hypothesis of melt-phase diffusion across the interface.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Copyright for this article belongs to M/s Taylor & Francis Group.
Uncontrolled Keywords: ion beam mixing; swift heavy ions; electronic energy loss
Subjects: Nuclear Science Technology
Depositing User: Mr. Abhishek Yadav
Date Deposited: 18 Oct 2012 13:00
Last Modified: 18 Oct 2012 13:00
URI: http://npl.csircentral.net/id/eprint/724

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