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Modeling of vortex dynamics in HTSs with defects under the impact of pulsed magnetic field
Journal of Physics: Condensed Matter ( IF 2.7 ) Pub Date : 2021-02-05 , DOI: 10.1088/1361-648x/abdce7
A N Moroz 1 , V A Kashurnikov 1 , I A Rudnev 1 , A N Maksimova 1
Affiliation  

By means of the Monte Carlo method, a numerical study of the vortex system in a high-temperature superconductor under the impact of pulses of magnetic field has been conducted. Various shapes and amplitudes of pulses have been considered. Samples with random and regular distributions of three different numbers of defects have been compared from the viewpoint of efficiency of flux trapping. The low-temperature behaviour of vortices and their penetration into samples have been shown to be independent of the pulse shape but strongly dependent of the type of pinning distribution. Saturating dependences of density of trapped magnetic flux on the pulse amplitude have been obtained. The samples with random pinning demonstrated higher efficiency of flux trapping at lower pulse amplitudes, and the samples with a triangular lattice of defects - at higher amplitudes. If the amplitude exceeded the saturation field of both samples, the trapped field was almost equal. The increasing number of defects has lead to an increase in trapped field within the considered range of concentrations.

中文翻译:

脉冲磁场影响下具有缺陷的 HTS 中的涡流动力学建模

采用蒙特卡罗方法,对磁场脉冲作用下高温超导体中的涡旋系统进行了数值研究。已经考虑了各种形状和幅度的脉冲。从通量捕获效率的角度比较了三种不同数量缺陷的随机分布和规则分布的样品。涡流的低温行为及其对样品的渗透已被证明与脉冲形状无关,但强烈依赖于钉扎分布的类型。已经获得了捕获的磁通量密度对脉冲幅度的饱和依赖性。具有随机钉扎的样品在较低脉冲幅度下表现出更高的通量捕获效率,以及具有三角形缺陷晶格的样品 - 在更高的幅度。如果幅度超过两个样品的饱和场,则捕获场几乎相等。缺陷数量的增加导致所考虑的浓度范围内的俘获场增加。
更新日期:2021-02-05
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