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首页> 外文期刊>Physica, C. Superconductivity and its applications >Superconductivity and critical fields in undoped and Sn-doped MoSr _2YCu_2O_(8-δ)
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Superconductivity and critical fields in undoped and Sn-doped MoSr _2YCu_2O_(8-δ)

机译：未掺杂和锡掺杂的MoSr _2YCu_2O_（8-δ）中的超导和临界场

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摘要

Samples with nominal compositions MoSn_xSr_2YCu _2O_(8-δ) (0 ≤ x ≤ 0.075) were synthesized and their superconducting and magnetotransport properties were investigated. It was established that the optimum Sn-doping (x = 0.02 and 0.03) increases the T_c of the undoped MoSr_2YCu_2O _(8-δ). The upper critical fields of the samples were determined using magnetization, susceptibility and resistivity measurements. It was established that the Sn-doping weakly affects the first and the intragrain second critical field of Mo-1212 but enhances the extrapolated to T = 0 (i.e. the intergrain) upper critical field. The observed phenomena were discussed on the basis of the Josephson-junction-arrays model. A phenomenological expression describing the temperature dependency of the susceptibility of Mo-1212 was found.
机译：合成了标称成分为MoSn_xSr_2YCu _2O_（8-δ）（0≤x≤0.075）的样品，并研究了它们的超导和磁传输性能。已经确定，最佳的Sn掺杂（x = 0.02和0.03）会增加未掺杂的MoSr_2YCu_2O _（8-δ）的T_c。使用磁化，磁化率和电阻率测量确定样品的上临界场。已确定，Sn掺杂对Mo-1212的第一和第二晶粒内临界场产生微弱影响，但会增强外推至T = 0（即晶粒间）上临界场。在约瑟夫森结阵列模型的基础上讨论了观察到的现象。发现了描述Mo-1212磁化率的温度依赖性的现象学表达。

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