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

Samanta, S. B.; Narayan, Himanshu; Gupta, Anurag; Narlikar, A. V.; Muranaka, T.; Akimitsu, J.

dc.contributor.author	Samanta, S. B.
dc.contributor.author	Narayan, Himanshu
dc.contributor.author	Gupta, Anurag
dc.contributor.author	Narlikar, A. V.
dc.contributor.author	Muranaka, T.
dc.contributor.author	Akimitsu, J.
dc.date.accessioned	2016-12-07T12:02:31Z
dc.date.available	2016-12-07T12:02:31Z
dc.date.issued	2002-02-20
dc.identifier.uri	https://dx.doi.org/10.1103/PhysRevB.65.092510
dc.identifier.uri	http://repository.tml.nul.ls/handle/20.500.14155/961
dc.description.abstract	The 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.language.iso	en	en_ZA
dc.publisher	The American Physical Society	en_ZA
dc.rights	2002 The American Physical Society	en_ZA
dc.source	Physical Review B, Volume 65, 092510	en_ZA
dc.title	Grain boundaries as weak links: The case of MgB2 with reference to YNi2B2C	en_ZA
dc.type	Article	en_ZA