Superconducting properties of single-crystalline Ca(Al0.5,Si0.5)2:: A ternary silicide with the AlB2-type structure -: art. no. 064512

被引：38

作者：

Imai, M ^{[1
]}

Sadki, EHS ^{[1
]}

Abe, H ^{[1
]}

Nishida, K ^{[1
]}

Kimura, T ^{[1
]}

Sato, T ^{[1
]}

Hirata, K ^{[1
]}

Kitazawa, H ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.68.064512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Superconducting properties of single-crystalline Ca(Al-0.5,Si-0.5)(2), which is isostructural to MgB2, were studied by measurements of electrical resistivity, Hall coefficient, and magnetization. Ca(Al-0.5,Si-0.5)(2) is a type-II superconductor with a carrier density of 8.6x10(26) electrons/m(3) at 290 K. The lower critical field H-C1 has a parabolic temperature dependence typical for conventional superconductors. The upper critical field (H-C2) anisotropy ratio has a temperature-independent value of 2.3. The Ginzburg-Landau (GL) parameter kappa(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.

引用

页数：7

共 21 条

[1] Superconductivity of Ca(Al0.5,Si0.5)2, a ternary silicide with the AlB2-type structure
Imai, M
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APPLIED PHYSICS LETTERS, 2002, 80 (06) : 1019 - 1021
[2] Superconductivity of MI(MII0.5,Si0.5)2 (MI = Sr and Ba, MII = Al and Ga), ternary silicides with the AlB2-type structure
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[4] Identical superconducting gap on different Fermi surfaces of Ca(Al0.5Si0.5)2 with the AlB2 structure
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