2016年7月
Large Upper Critical Field of Superconductivity in the Single Crystal U6Co
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- ,
- ,
- 巻
- 85
- 号
- 7
- 開始ページ
- 073713 1
- 終了ページ
- 073713 4
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7566/JPSJ.85.073713
- 出版者・発行元
- PHYSICAL SOC JAPAN
We grew single crystals of U6Co by the self-flux method and measured the magnetic susceptibility, resistivity, and specific heat. The magnetic susceptibility shows very small anisotropy and weak temperature dependence, indicating small spin-susceptibility. Superconductivity was clearly observed in the resistivity, susceptibility, and specific heat at T-c similar to 2.3 K. The upper critical field was remarkably large, 7.9 and 6.6 T for H parallel to [001] and [110], respectively, in the tetragonal structure, indicating that the ellipsoidal Fermi surface is slightly suppressed along the [001] direction according to the effective mass model. The specific heat shows a large jump at T-c with Delta C/gamma T-c = 1.58, and the field dependence of the specific heat at low temperatures shows an almost linear increase. These experimental results are well explained by the BCS model in the dirty limit condition. U6Co is most likely a conventional s-wave superconductor with a full superconducting gap.
- リンク情報
- ID情報
-
- DOI : 10.7566/JPSJ.85.073713
- ISSN : 0031-9015
- Web of Science ID : WOS:000378729500014