Phase Transitions between Type-I, Type-II/1 and Type-II/2 Superconductivity
Phase Transitions between Type-I, Type-II/1 and Type-II/2 Superconductivity
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Type-I、Type-II/1 和 Type-II/2 超导之间的相变
DOI：
10.7567/jjaps.26s3.917
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
U. Klein
中科院分区：
文献类型：
--
作者：
H. Weber;M. Botlo;F. Sauerzopf;H. Wiesinger;U. Klein
为了研究低κ超导体磁化曲线上沿着的相变性质，研究了几种不同杂质含量的Ta-、Nb-和V-单晶，从而得到不同的Ginzburg-Landau参数κ（Tc）。最近的微观计算有效的任意杂质含量，但仅限于弱耦合各向同性限制的结果进行了比较。对于I型/II型/1型相界，理论与实验之间的差异归因于各向异性效应。在相图的II型侧，理论预测相边界对杂质浓度的显著依赖性，而实验落在相当均匀的边界曲线上。
In order to study the nature of phase transitions along the magnetization curve of low-κ superconductors, several Ta-, Nb- and V- single crystals of varying impurity content and, hence, different Ginzburg-Landau parameter κ (Tc) were investigated. The results are compared with recent microscopic calculations valid at arbitrary impurity content, but restricted to the weak-coupling isotropic limit. For the type-I/type-II/1 phase boundary, the differences between theory and experiment are attributed to anisotropy effects. On the type-II side of the phase diagram, theory predicts a significant dependence of the phase boundary on the impurity concentration, whereas the experiments fall on a rather uniform boundary curve.