@article{c39fad589ff14745a88afa7e1f86adb2,
title = "MgB2 films with very high critical current densities due to strong grain boundary pinning",
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.",
author = "H. Kitaguchi and A. Matsumoto and H. Kumakura and T. Doi and H. Yamamoto and K. Saitoh and H. Sosiati and S. Hata",
note = "Funding Information: We thank D.C. Larbalestier (University of Wisconsin) for reviewing the manuscript, his suggestions, and encouragement. We thank N. Kuwano and Y. Tomokiyo (both in Kyushu University) for their valuable comments on the microstructure observations and analyses. This work was supported in part by Research Promotion Bureau, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, under the Contract Nos. 15-213 and 15-332 (H. Ki. and A. M.). TEM analyses were carried in “Nanotechnology Support Project” of the MEXT, Japan (H.S. and S.H.).",
year = "2004",
month = oct,
day = "4",
doi = "10.1063/1.1805195",
language = "English",
volume = "85",
pages = "2842--2844",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "14",
}