Superconducting gaps of nanocrystalline MgB2

B. Lorenz, O. Perner, J. Eckert, C. W. Chu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The superconducting gap structure of nanocrystalline MgB2 is investigated by heat capacity measurements. It is shown that the larger σ-gap decreases as a consequence of defects and impurities introduced by the specifics of the high-energy ball milling synthesis process. This explains the reduction of the critical temperature. The smaller π-gap slightly increases as compared to bulk MgB2 indicating an enhanced interband scattering in the nanocrystalline samples.

Original languageEnglish
Pages (from-to)553-554
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume460-462 I
Issue numberSPEC. ISS.
Publication statusPublished - 2007 Sept 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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