关于 MgB2 和 CaKFe4As4 中 Tc 附近的滞留通量蠕变

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2024-03-22 DOI:10.1016/j.physc.2024.1354487

Sergey L. Bud’ko, Mingyu Xu , Paul C. Canfield

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引用次数: 0

摘要

我们介绍了在不同温度下对已知的常压超导体 CaKFe4As4 和 MgB2 的单晶体进行磁通量蠕变的数据，这些数据是使用困磁通量测量的常用协议获得的。我们的研究结果表明，H3S 中磁矩的时间依赖性与在常温常压下的成熟超导体中观察到的磁化弛豫速率非常相似，在后一种情况下，磁矩的时间依赖性可以明确归因于磁通蠕变。

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On creep of trapped flux near Tc in MgB2 and CaKFe4As4

We present flux creep data taken at different temperatures on single crystals of known, ambient pressure, superconductors, CaKFe₄As₄ and MgB₂, taken using the protocol that is common for trapped flux measurements. Using our results, we show that the time dependence of the magnetic moment in H₃S is remarkably similar to the magnetization relaxation rates observed in established superconductors at ambient pressure, where in the latter cases this can be unambiguously assigned to flux creep.

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.