Y3Ba5Cu8O18-δ/Co复合超导体的相干长度和输运临界电流密度

IF 1.4 3区物理与天体物理 Q4 PHYSICS, APPLIED

Journal of Low Temperature Physics Pub Date : 2025-07-11 DOI:10.1007/s10909-025-03320-4

Ipsita Mukherjee, Ajay Kumar Ghosh

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引用次数: 0

摘要

我们研究了多层Y3Ba5Cu8O18-δ (Y358)超导体晶间网络中低浓度的铁磁性co纳米颗粒如何影响绝对零度温度下的相干长度（ξc）和超导相变区附近的临界电流密度（Jc）。波动诱导电导率（FIC）用于提取ξc(0)。随着Co浓度的增加，其ξc(0)有增大的趋势，这是由于超导性能的恶化。我们从相变区域的电流-电压（IV）特征中提取了Jc。随着co纳米颗粒浓度的增加，也观察到Jc的减少。

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Coherence Length and Transport Critical Current Density in Y3Ba5Cu8O18-δ/Co Composite Superconductor

We have investigated how the low concentrations of ferromagnetic Co-nanoparticles in intergranular networks of multi-layered Y₃Ba₅Cu₈O_18-δ (Y358) superconductor affect the coherence length (ξ_c) at absolute zero temperature and critical current density, J_c, near the superconducting phase transition region. Fluctuation-induced conductivity (FIC) is used to extract ξ_c (0). An increasing trend of ξ_c (0) with increasing concentration of Co is observed, attributed to the deterioration of the superconducting properties. We have extracted J_c from current–voltage (IV) characteristics in the phase transition region. Reduction in J_c has also been observed with increasing the concentration of Co-nanoparticles.

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来源期刊

Journal of Low Temperature Physics 物理-物理：凝聚态物理

CiteScore

3.30

自引率

25.00%

发文量

245

审稿时长

1 months

期刊介绍： The Journal of Low Temperature Physics publishes original papers and review articles on all areas of low temperature physics and cryogenics, including theoretical and experimental contributions. Subject areas include: Quantum solids, liquids and gases; Superfluidity; Superconductivity; Condensed matter physics; Experimental techniques; The Journal encourages the submission of Rapid Communications and Special Issues.