Comparative study of anisotropic superconductivity in CaAlSi and CaGaSi

T. Tamegai, K. Uozato, S. Kasahara, T. Nakagawa, M. Tokunaga

Research output: Contribution to journalConference articlepeer-review

14 Citations (Scopus)


In order to get some insight into the origin of the anomalous angular dependence of Hc2 in a layered intermetallic compound CaAlSi, electronic, superconducting, and structural properties are compared between CaAlSi and CaGaSi. The angular dependence of Hc2 in CaGaSi is well described by the anisotropic GL model. Parallel to this finding, the pronounced lattice modulation accompanying the superstructure along the c-axis in CaAlSi is absent in CaGaSi. A relatively large specific heat jump at the superconducting transition in CaAlSi compared with CaGaSi indicates the presence of strong electron-phonon coupling in CaAlSi, which may cause the superstructure and the anomalous angular dependence of Hc2.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue numberI
Publication statusPublished - Oct 1 2005
Externally publishedYes
EventProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
Duration: Nov 23 2004Nov 25 2004


  • Anisotropy
  • CaAlSi
  • CaGaSi
  • Superstructure
  • Upper critical field

ASJC Scopus subject areas

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


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