Electrical transport properties of bulk MgB2 materials synthesized by electrolysis on fused mixtures of MgCl2, NaCl, KCl and MgB2O4
Electrical transport properties of bulk MgB2 materials synthesized by electrolysis on fused mixtures of MgCl2, NaCl, KCl and MgB2O4
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MgCl2、NaCl、KCl 和 MgB2O4 熔融混合物电解合成块状 MgB2 材料的电传输特性
DOI：
10.1088/0953-2048/15/10/101
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Abe
中科院分区：
文献类型：
--
作者：
K. Yoshii;H. Abe
块状 MgB2 材料是在 600 °C 的 Ar 流下由 MgCl2、NaCl、KCl 和 MgB2O4 的熔融混合物通过电化学合成的。样品的电阻率测量显示，在没有施加磁场的情况下，超导转变在约 37 K 时开始。该温度与磁测量观察到的温度非常接近。电阻率在约 32 K 以下降至零。根据电阻率的外加场依赖性，计算出 0 K 时的上临界场和相干长度分别为 9.7 T 和 5.9 nm。
Bulk MgB2 materials have been synthesized electrochemically from fused mixtures of MgCl2, NaCl, KCl and MgB2O4 under an Ar flow at 600 °C. Electrical resistivity measurements for the samples show an onset of superconducting transition at ~37 K in the absence of an applied magnetic field. This temperature is quite close to that observed from magnetic measurements. The resistivity decreases to zero below ~32 K. From the applied-field dependence of resistivity, the upper critical field and the coherence length were calculated to be 9.7 T and 5.9 nm at 0 K, respectively.