Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries

Y. Zhao, D. X. Huang, Y. Feng, C. H. Cheng, T. MacHi, N. Koshizuka, M. Murakami

研究成果: Article査読

77 被引用数 (Scopus)

抄録

The microstructure of the Ti-doped MgB2 which shows a significantly improved critical current density, Jc [Appl. Phys. Lett. 79, 1154 (2001)], is investigated. It is found that Ti does not occupy the atomic site in the MgB2 crystal structure, but forms a thin TiB 2 layer (with a thickness about one unit cell of TiB2) in the grain boundaries of MgB2. Besides, MgB2 grains are greatly refined by Ti doping, forming a strongly coupled nanoparticle structure. It is argued that the unique microstructure of the MgB2 nanoparticles with TiB2 nanograin boundaries may take responsibility for the enhancement of Jc in the Ti-doped MgB2 bulk superconductor.

本文言語English
ページ(範囲)1640-1642
ページ数3
ジャーナルApplied Physics Letters
80
9
DOI
出版ステータスPublished - 2002 3 4
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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