MgB2 films with very high critical current densities due to strong grain boundary pinning

H. Kitaguchi, A. Matsumoto, H. Kumakura, T. Doi, H. Yamamoto, K. Saitoh, H. Sosiati, S. Hata

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)

Abstract

The production of critical current density (Jc) by 20-30 nm diameter columnar grains of MgB2 was analyzed. It was observed that 20-30 nm diameter columnar grain structure produced Jc exceeding 5×106 A/cm2. It was also observed that strongest pinning ocurred when the field was aligned parallel to the grain boundaries. The results show that grain boundaries in MgB2 do not obstruct current flow as in the high-temperature cuprate superconductors, but act like those in intermetallic superconductors such as Nb3Sn.

Original languageEnglish
Pages (from-to)2842-2844
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number14
DOIs
Publication statusPublished - Oct 4 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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