Phase separation in carbon-doped MgB2 superconductors

I. Maurin, S. Margadonna, K. Prassides*, T. Takenobu, T. Ito, D. H. Chi, Y. Iwasa, A. Fitch

*この研究の対応する著者

研究成果: Article査読

32 被引用数 (Scopus)

抄録

High-resolution synchrotron X-ray powder diffraction measurements have been carried out on superconducting MgB2-xCx (0 ≤ x ≤ 0.1) phases. The carbon miscibility in the hexagonal AlB2-type structure is very small, x < 0.04. At higher carbon contents, macroscopic phase separation occurs leading to the coexistence of at least two phases, isostructural with the parent MgB2 compound. The coexisting phases differ mainly in their in-plane lattice constants, suggesting that boron is substituted by carbon in the boron layers, but in different concentrations. The multiphase samples still show a clear one-step superconducting transition and full shielding, χ = -1/4π.

本文言語English
ページ(範囲)392-397
ページ数6
ジャーナルPhysica B: Condensed Matter
318
4
DOI
出版ステータスPublished - 2002 6
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学

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