Grain boundaries as weak links: The case of MgB2 with reference to YNi2B2C

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dc.contributor.authorSamanta, S. B.
dc.contributor.authorNarayan, Himanshu
dc.contributor.authorGupta, Anurag
dc.contributor.authorNarlikar, A. V.
dc.contributor.authorMuranaka, T.
dc.contributor.authorAkimitsu, J.
dc.date.accessioned2016-12-07T12:02:31Z
dc.date.available2016-12-07T12:02:31Z
dc.date.issued2002-02-20
dc.description.abstractThe grain boundaries ~GB’s! in the intermetallic superconductor MgB2 , interestingly, do not show suppression of supercurrent density. This unexpected behavior has been investigated by a scanning tunneling microscopy/spectroscopy technique at atomic resolution. The GB in MgB2 is seen as an amorphous region extending from ;50 to 200 Å and has a metallic character. This observation supports proximity coupling between the grains, which explains why supercurrent density does not degrade in this material. The results for another intermetallic superconductor YNi2B2C having GB’s ~average width ;30 Å! that are quasi-insulating in nature have also been presented and compared with the former.en_ZA
dc.identifier.urihttps://dx.doi.org/10.1103/PhysRevB.65.092510
dc.identifier.urihttp://repository.tml.nul.ls/handle/20.500.14155/961
dc.language.isoenen_ZA
dc.publisherThe American Physical Societyen_ZA
dc.rights2002 The American Physical Societyen_ZA
dc.sourcePhysical Review B, Volume 65, 092510en_ZA
dc.titleGrain boundaries as weak links: The case of MgB2 with reference to YNi2B2Cen_ZA
dc.typeArticleen_ZA
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