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首页> 外文期刊>Physica, C. Superconductivity and its applications >First-order melting transition observed from resistivity measurements in ultra-pure YBa sub(2)Cu sub(3)O sub(7- delta ) single crystals with high twin boundary density
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First-order melting transition observed from resistivity measurements in ultra-pure YBa sub(2)Cu sub(3)O sub(7- delta ) single crystals with high twin boundary density

机译：从高双晶界密度的超纯YBa sub（2）Cu sub（3）O sub（7-delta）单晶电阻率测量中观察到的一级熔融转变

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摘要

R(T) measurements have been performed on optimally and overdoped heavily twinned high-purity YBa sub(2)Cu sub(3)O sub(7- delta ) single crystals, under a magnetic field B oriented parallel to the twin boundary planes (B parallel c). The characteristic feature attributed to the flux line lattice melting transition has been observed in the overdoped case for B greater than or equal to 5 T. The first-order transition was not found in the optimally doped sample, even when B was tilted with respect to the c-axis. Differences between these samples are discussed.
机译：在平行于孪晶边界平面（B）定向的磁场B的作用下，对最佳和过量掺杂的重孪晶高纯度YBa sub（2）Cu sub（3）O sub（7-delta）单晶进行了R（T）测量。 B平行c）。对于大于或等于5 T的B，在超掺杂情况下观察到归因于通量线晶格熔化转变的特征。即使当B相对于B倾斜时，在最佳掺杂样品中也未发现一阶转变。 c轴。讨论了这些样本之间的差异。

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