Superconductivity in BaCu_xSi_<2-x> (0.2≦x≦0.6) with AlB_2-type structure
Superconductivity in BaCu_xSi_<2-x> (0.2≦x≦0.6) with AlB_2-type structure
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AlB_2型结构的BaCu_xSi_<2-x>（0.2≤x≤0.6）中的超导性
DOI：
10.1016/j.phpro.2012.03.408
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
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作者：
K. Inoue;T. Muranaka;et al.
我们发现了BaCuxSi2-x的超导性（0.2≤x≤0.6），最大Tc为3k。合成的样品具有alb2型结构。我们测量了超导状态下BaCu0.3Si1.7的物理性质随温度和磁场的变化。磁化与磁场（M-H）曲线显示出典型的ii型超导行为。确定超导参数Hc1(0)、Hc2(0)、λ(0)、ξ(0)和κ眩光分别约为20 Oe、22 Oe、570 nm、12 nm和48。晶格常数a、c和Tc值与Cu浓度x有关，Tc随x的增加而减小。
We discovered superconductivity in BaCuxSi2-x (0.2 ≤x ≤ 0.6) with the maximum Tc of 3 K. The synthesized samples have AlB2-type structure. We measured the physical properties of BaCu0.3Si1.7 in the superconducting state as functions of temperature and magnetic field. Magnetization vs. magnetic field (M–H) curves show typical type-II superconducting behavior. Superconducting parameters Hc1(0), Hc2(0), λ(0), ξ(0), and κGLare determined to be about 20 Oe, 22 kOe, 570 nm, 12 nm, and 48, respectively. Lattice constants a and c and the Tc value depend on Cu concentration, x, Tc decreases with increasing x.