skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains formed by molecular beam epitaxy

Abstract

The relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains was investigated. Two kinds of as-grown MgB{sub 2} thin films were prepared with or without inclination of columnar grain growth with respect to the substrate plane by using molecular beam epitaxy. In a magnetic field, maximum J{sub c} was obtained when the field angle matched the direction of columnar grain growth. The fabricated MgB{sub 2} thin films showed a high critical current density of J{sub c}=1.3x10{sup 5} A/cm{sup 2} in 14 T at 4.2 K. The present results give a direct proof of flux pinning originating in columnar grain boundaries for MgB{sub 2} thin films.

Authors:
; ; ; ;  [1];  [2];  [2]
  1. Advanced Research Laboratory, Hitachi Ltd., 1-280, Higashi-Koigakubo, Kokubunji-shi, Tokyo 185-8601 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20960196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 14; Other Information: DOI: 10.1063/1.2720272; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRITICAL CURRENT; CRYSTAL GROWTH; CURRENT DENSITY; GRAIN BOUNDARIES; GRAIN GROWTH; LAYERS; MAGNESIUM BORIDES; MAGNETIC FIELDS; MAGNETIC FLUX; MOLECULAR BEAM EPITAXY; SUBSTRATES; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Yamamoto, H., Tsukamoto, A., Saitoh, K., Okada, M., Kitaguchi, H., Material Research Laboratory, Hitachi Ltd., 7-1-1, Omika-cho, Hitachi-shi, Ibaraki-ken 319-1292, and National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047. Relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains formed by molecular beam epitaxy. United States: N. p., 2007. Web. doi:10.1063/1.2720272.
Yamamoto, H., Tsukamoto, A., Saitoh, K., Okada, M., Kitaguchi, H., Material Research Laboratory, Hitachi Ltd., 7-1-1, Omika-cho, Hitachi-shi, Ibaraki-ken 319-1292, & National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047. Relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains formed by molecular beam epitaxy. United States. doi:10.1063/1.2720272.
Yamamoto, H., Tsukamoto, A., Saitoh, K., Okada, M., Kitaguchi, H., Material Research Laboratory, Hitachi Ltd., 7-1-1, Omika-cho, Hitachi-shi, Ibaraki-ken 319-1292, and National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047. Mon . "Relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains formed by molecular beam epitaxy". United States. doi:10.1063/1.2720272.
@article{osti_20960196,
title = {Relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains formed by molecular beam epitaxy},
author = {Yamamoto, H. and Tsukamoto, A. and Saitoh, K. and Okada, M. and Kitaguchi, H. and Material Research Laboratory, Hitachi Ltd., 7-1-1, Omika-cho, Hitachi-shi, Ibaraki-ken 319-1292 and National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047},
abstractNote = {The relationship between flux pinning and microstructure in MgB{sub 2} thin films with columnar grains was investigated. Two kinds of as-grown MgB{sub 2} thin films were prepared with or without inclination of columnar grain growth with respect to the substrate plane by using molecular beam epitaxy. In a magnetic field, maximum J{sub c} was obtained when the field angle matched the direction of columnar grain growth. The fabricated MgB{sub 2} thin films showed a high critical current density of J{sub c}=1.3x10{sup 5} A/cm{sup 2} in 14 T at 4.2 K. The present results give a direct proof of flux pinning originating in columnar grain boundaries for MgB{sub 2} thin films.},
doi = {10.1063/1.2720272},
journal = {Applied Physics Letters},
number = 14,
volume = 90,
place = {United States},
year = {Mon Apr 02 00:00:00 EDT 2007},
month = {Mon Apr 02 00:00:00 EDT 2007}
}