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Properties of strong-coupled MgB2 nanobridges fabricated by focused ion beam

Authors
Hong, Sung-HakLee, Soon-GulSeong, Won KyungKang, Won Nam
Issue Date
Dec-2010
Publisher
ELSEVIER
Keywords
MgB2 superconductor; Inter-grain nanobridge
Citation
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, v.470, pp.S1038 - S1040
Indexed
SCIE
SCOPUS
Journal Title
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume
470
Start Page
S1038
End Page
S1040
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/115210
DOI
10.1016/j.physc.2009.11.134
ISSN
0921-4534
Abstract
We have studied extremely strong-coupled MgB2 inter-grain nanobridges prepared by using focused ion beam. Nominal width and length of the bridges were 200 nm. The superconducting transition temperature and the critical current density of the bridges were the same as those of unpatterned film. Current-voltage (I-V) curves showed large excess currents, which is believed to be due to the flux-flow effect. Nevertheless, I-V curves showed substantial amount of Josephson coupling effect near T-c. The temperature-dependent critical current was I-c similar to (T-c - T)(1.5), similar to that of a thin superconducting film in Ginzburg-Landau theory. (C) 2009 Published by Elsevier B.V.
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College of Science and Technology > Semiconductor Physics in Division of Display and Semiconductor Physics > 1. Journal Articles

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