Correlation of the superconductivity with the multi-stack structure in MgB2-type superconductor CaAlSi

Hajime Sagayama, Yusuke Wakabayashi, Hiroshi Sawa, Takashi Kamiyama, Akinori Hoshikawa, Stefanus Harjo, Kentaro Uosato, Ajay K. Ghosh, Masashi Tokunaga, Tsuyoshi Tamegai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

CaAlSi is a superconductor with the AlB2-like structure. In this system, there are two types of multi-stack structures along c-axis, 5-fold structure and 6-fold structure. The 5-fold structure sample and the 6-fold structure sample have TC of 6 K and 8 K, respectively. To investigate the correlation of stack structure with the superconductivity, we determined the crystal structures accurately using synchrotron radiation X-ray diffraction and neutron diffraction measured at KEK. Al and Si atoms form slightly corrugated honeycomb layers and those are ordered in both stack structures. The difference of stacking structure is caused by phase relation among Al-Si layers.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages643-644
Number of pages2
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Keywords

  • CaAlSi
  • Multi-stack structure
  • Superconductivity

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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