Superconducting State of Silver-Oxide Clathrate Ag6O8AgNO3
Superconducting State of Silver-Oxide Clathrate Ag6O8AgNO3
复制标题
氧化银笼形物Ag6O8AgNO3的超导态
DOI：
10.1143/jpsj.77.024707
复制
发表时间：
2008
影响因子：
1.7
通讯作者：
Y. Maeno
中科院分区：
文献类型：
--
作者：
K. Kawashima;M. Ishii;H. Okabe;J. Akimitsu;M. Kriener;H. Takatsu;S. Yonezawa;Y. Maeno
我们报道了氧化银笼形物Ag 6 O 8阿尼奥3的正常态和超导性质.电阻率，比热，直流和交流磁化率测量作为磁场和温度的函数显示在90和185 K附近的相变。结果表明，Ag 6 O 8阿尼奥3是块体超导体，超导转变温度Tc = 1.04K.我们观察到一个明确的扭结结构的真实的部分的交流磁化率的场依赖性，这表明在涡旋状态的变化。此外，我们给出了该化合物的H-T相图，并估计了其上临界场Hc ~ 2（0）约为770 Oe，还在Ginzburg-Landau框架下讨论了其超导性质。
We report the normal-state and superconducting properties of the silver-oxide clathrate Ag 6 O 8 AgNO 3 . Electrical resistivity, specific heat, and DC and AC susceptibility measurements as functions of magnetic field and temperature show phase transitions near 90 and 185 K. We find that Ag 6 O 8 AgNO 3 is a bulk superconductor with the superconducting transition temperature T c =1.04 K. We observe a clear kink structure in the field dependence of the real part of AC susceptibility, suggesting a change in vortex state. Furthermore, we present the H – T phase diagram of this compound and estimate the upper critical field H c2 (0) to be about 770 Oe. We also discuss the superconducting properties in a Ginzburg–Landau framework.