Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries

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

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)1640-1642
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number9
DOIs
Publication statusPublished - 2002 Mar 4
Externally publishedYes

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grain boundaries
nanoparticles
microstructure
critical current
current density
crystal structure
augmentation
cells

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Zhao, Y., Huang, D. X., Feng, Y., Cheng, C. H., MacHi, T., Koshizuka, N., & Murakami, M. (2002). Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries. Applied Physics Letters, 80(9), 1640-1642. https://doi.org/10.1063/1.1456969

Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries. / Zhao, Y.; Huang, D. X.; Feng, Y.; Cheng, C. H.; MacHi, T.; Koshizuka, N.; Murakami, Masato.

In: Applied Physics Letters, Vol. 80, No. 9, 04.03.2002, p. 1640-1642.

Research output: Contribution to journalArticle

Zhao, Y, Huang, DX, Feng, Y, Cheng, CH, MacHi, T, Koshizuka, N & Murakami, M 2002, 'Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries', Applied Physics Letters, vol. 80, no. 9, pp. 1640-1642. https://doi.org/10.1063/1.1456969
Zhao Y, Huang DX, Feng Y, Cheng CH, MacHi T, Koshizuka N et al. Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries. Applied Physics Letters. 2002 Mar 4;80(9):1640-1642. https://doi.org/10.1063/1.1456969
Zhao, Y. ; Huang, D. X. ; Feng, Y. ; Cheng, C. H. ; MacHi, T. ; Koshizuka, N. ; Murakami, Masato. / Nanoparticle structure of MgB2 with ultrathin TiB2 grain boundaries. In: Applied Physics Letters. 2002 ; Vol. 80, No. 9. pp. 1640-1642.
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