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arXiv 1202.4772cond-mat.supr-con
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YbSb2单晶的I型超导电性

Type I Superconductivity in YbSb2 Single Crystals

Liang L. Zhao, Stefan Lausberg, H. Kim, M. A. Tanatar, Manuel Brando, R. Prozorov, E. Morosan

摘要:

我们提出的证据I型超导YbSb 2单晶,从直流和交流磁化,热容量和电阻率测量。临界温度和临界场分别为$T_c\approx$ 1.3 K和$H_c\approx$ 55 Oe,小的Ginzburg-Landau参数κ= 0.05,具有典型的I型超导体的磁化等温线,小的临界场值,强的微分顺磁效应(DPE)信号,以及场诱导的二阶到一阶相变,证实了YbSb 2中超导性的I型性质。在射频(RF)磁化率测量中观察到可能的第二超导态,$T_{c}^{(2)}\approx$为0.41 K,$H_{c}^{(2)}\approx$为430 Oe。

英文摘要:

We present evidence of type I superconductivity in YbSb2 single crystals, from DC and AC magnetization, heat capacity and resistivity measurements. The critical temperature and critical field are determined to be $T_c\approx$ 1.3 K and $H_c\approx$ 55 Oe. A small Ginzburg-Landau parameter κ= 0.05, together with typical magnetization isotherms of type I superconductors, small critical field values, a strong Differential Paramagnetic Effect (DPE) signal, and a field-induced change from second to first order phase transition, confirm the type I nature of the superconductivity in YbSb2. A possible second superconducting state is observed in the radiofrequency (RF) susceptibility measurements, with $T_{c}^{(2)}\approx$ 0.41 K and $H_{c}^{(2)}\approx$ 430 Oe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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