Anisotropic properties of the layered superconductor Cu0.07 Ti Se2

E. Morosan, Lu Li, Nai Phuan Ong, Robert Joseph Cava

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Abstract

The anisotropic superconducting properties of single crystals of Cu0.07 Ti Se2 were studied by measurements of magnetization and electrical resistivity. Tc is around 3.9 K, and the measured upper critical field (Hc2) values are ∼1.25 and 0.8 T, for applied field parallel and perpendicular to the Ti Se2 planes, respectively. The anisotropy ratio γanis = H c2 ab H c2 c is close to 1.6 and nearly temperature independent. The lower critical field (Hc1) values are much smaller (∼32 Oe for H ab and 17 Oe for H c); demagnetizing corrections for field perpendicular to the thin plate crystals are required for the determination of H c1 c. The anisotropy of the critical fields is described well by the anisotropic Ginzburg-Landau (GL) theory, and the characteristic GL parameters are determined and discussed.

Original languageEnglish (US)
Article number104505
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number10
DOIs
StatePublished - Mar 12 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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