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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Effects of the thermal driving forces on the distribution of critical current densities in high-T-c superconductors
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Effects of the thermal driving forces on the distribution of critical current densities in high-T-c superconductors

机译：热驱动力对高T-c超导体中临界电流密度分布的影响

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The dependence of the critical current density on the temperature and magnetic field of a dip-coated Bi2Sr2CaCu2O8+delta (Bi-2212) superconducting tape was calculated. The model took into account the effects of the thermal driving forces and the disordered nature of the pinning centres on the pinning potentials and consequently on the critical current densities. An expression for the effective pinning range in terms of the material parameters was derived and found to be d(pin) approximate to xi(1+delta(0)lambda(delta 0)/l(44)) where the quantity delta(0) is the ratio of the magnetic interaction energy to the elastic energy of the vortex lattice. The analysis provides the possibility that physically observed potentials controlling the motion of the vortices are temperature and field dependent and vary in different temperature ranges. The results of the model were compared with recent reported measurements on the Bi-2212 superconducting tape and good agreements are reproduced. [References: 12]
机译：计算了临界电流密度对浸涂Bi2Sr2CaCu2O8 +δ（Bi-2212）超导带的温度和磁场的依赖性。该模型考虑了热驱动力的影响以及钉扎中心的无序特性，从而影响了钉扎电势，进而影响了临界电流密度。根据材料参数得出有效钉扎范围的表达式，发现它是d（pin）近似于xi（1 + delta（0）lambda（delta 0）/ l（44）），其中数量delta（0） ）是涡旋晶格的磁性相互作用能与弹性能之比。该分析提供了控制涡旋运动的物理观察到的电势与温度和场有关并且在不同温度范围内变化的可能性。将模型的结果与Bi-2212超导带上最近报告的测量值进行了比较，并复制了良好的协议。 [参考：12]

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