TY - JOUR
T1 - Grain boundaries as weak links
T2 - The case of (formula presented) with reference to (formula presented)
AU - Samanta, S. B.
AU - Narayan, H.
AU - Gupta, A.
AU - Narlikar, A. V.
AU - Muranaka, T.
AU - Akimitsu, J.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - The grain boundaries (GB’s) in the intermetallic superconductor (formula presented) 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 (formula presented) 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 (formula presented) having GB’s (average width 30 Å) that are quasi-insulating in nature have also been presented and compared with the former.
AB - The grain boundaries (GB’s) in the intermetallic superconductor (formula presented) 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 (formula presented) 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 (formula presented) having GB’s (average width 30 Å) that are quasi-insulating in nature have also been presented and compared with the former.
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U2 - 10.1103/PhysRevB.65.092510
DO - 10.1103/PhysRevB.65.092510
M3 - Article
AN - SCOPUS:85038285253
SN - 1098-0121
VL - 65
SP - 1
EP - 3
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
ER -