TY - JOUR
T1 - Superconducting properties of single-crystalline Ca(Al0.5, Si0.5)2
T2 - A ternary silicide with the AlB2-type structure
AU - Imai, Motoharu
AU - Sadki, El Hadi S.
AU - Abe, Hideki
AU - Nishida, Kenji
AU - Kimura, Takashi
AU - Sato, Taku
AU - Hirata, Kazuto
AU - Kitazawa, Hideaki
PY - 2003
Y1 - 2003
N2 - Superconducting properties of single-crystalline Ca(Al0.5, Si0.5)2, which is isostructural to MgB2, were studied by measurements of electrical resistivity, Hall coefficient, and magnetization. Ca(Al0.5, Si0.5)2 is a type-II superconductor with a carrier density of 8.6×1026 electrons/m3 at 290 K. The lower critical field HC1 has a parabolic temperature dependence typical for conventional superconductors. The upper critical field (HC2) anisotropy ratio has a temperature-independent value of 2.3. The Ginzburg-Landau (GL) parameter κ(0) is equal to 12 and 5.2 in the ab-plane and c-axis directions, respectively. The anisotropy of the critical fields can be well described by the anisotropic GL theory.
AB - Superconducting properties of single-crystalline Ca(Al0.5, Si0.5)2, which is isostructural to MgB2, were studied by measurements of electrical resistivity, Hall coefficient, and magnetization. Ca(Al0.5, Si0.5)2 is a type-II superconductor with a carrier density of 8.6×1026 electrons/m3 at 290 K. The lower critical field HC1 has a parabolic temperature dependence typical for conventional superconductors. The upper critical field (HC2) anisotropy ratio has a temperature-independent value of 2.3. The Ginzburg-Landau (GL) parameter κ(0) is equal to 12 and 5.2 in the ab-plane and c-axis directions, respectively. The anisotropy of the critical fields can be well described by the anisotropic GL theory.
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U2 - 10.1103/PhysRevB.68.064512
DO - 10.1103/PhysRevB.68.064512
M3 - Article
AN - SCOPUS:4043118626
SN - 0163-1829
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
ER -