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Swift heavy ion irradiation of MgB2 thin films: a comparison between gold and silver ion irradiations

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dc.contributor.author Narayan, Himanshu
dc.contributor.author Agrawal, H. M.
dc.contributor.author Kushwaha, R. P. S.
dc.contributor.author Kishan, H.
dc.contributor.author Bhatt, Ravindra K.
dc.date.accessioned 2016-12-08T16:40:37Z
dc.date.available 2016-12-08T16:40:37Z
dc.date.issued 2007
dc.identifier.uri http://dx.doi.org/10.1088/0953-8984/19/13/136209
dc.identifier.uri http://repository.tml.nul.ls/handle/123456789/1146
dc.description.abstract The effect of 200 MeV Au ion irradiation on the temperature and field dependence of the critical current density, Jc, of MgB2 thin films on sapphire substrates is reported. The results have been presented in comparison with those obtained after 200 MeV Ag ion irradiation of a similar film. After irradiation, the critical temperature Tc decreased for all samples except for the one with a higher dose of gold ions, where it increased marginally. This observation was also confirmed from measurements of magnetization as a function of temperature with a constant applied field of 10−2 T. The critical current density, Jc, was estimated from the widths of magnetization loops using Bean’s critical state model. It has been found that Jc increases after irradiation, the enhancement being more pronounced for the Au ion irradiation. The higher enhancement of Jc by Au ion irradiation may be attributed to higher flux-pinning efficiency of the irradiated samples. It has been concluded that, although the flux-line shear (FLS) model satisfactorily explains the silver ion irradiation induced enhancement of Jc, some other mechanisms also seem to play a role in the Jc enhancement by gold ion irradiation. en_ZA
dc.language.iso en en_ZA
dc.rights © 2007 IOP Publishing Ltd en_ZA
dc.source Journal of Physics: Condensed Matter, Volume 19 (2007) 136209 (11pp) en_ZA
dc.title Swift heavy ion irradiation of MgB2 thin films: a comparison between gold and silver ion irradiations en_ZA
dc.type Article en_ZA


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