管内粉末法制备Bi:2223/ag带在30k下的剩余磁化和磁弛豫

IF 2.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Physics A Pub Date : 2025-09-24 DOI:10.1007/s00339-025-08948-3

İbrahim Düzgün, Selahattin Çelebi

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引用次数: 0

摘要

本文研究了采用管内粉末（PIT）法制备的Bi-2223/Ag超导带的剩余磁化和磁弛豫行为。测量在30 K的固定温度下进行，在不同的磁场循环振幅和恒定磁场条件下进行，以分析随时间变化的磁化强度。将全磁循环后的剩余磁化强度归一化，并与基于扩展临界状态模型的理论预测结果进行了比较。此外，在30 K下记录磁松弛曲线以评估磁流变特性。观察到磁化强度的明显对数衰减，表明至少存在两种不同的钉住机制。这些结果有助于深入了解实际超导应用中Bi-2223/Ag PIT带的通量动力学和磁稳定性。

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Remanent magnetization and magnetic relaxation in Bi:2223/ag tapes fabricated by the Powder-in-Tube (PIT) method at 30 K

In this study, the remanent magnetization and magnetic relaxation behaviour of Bi-2223/Ag superconducting tapes fabricated using the Powder-In-Tube (PIT) method were investigated. Measurements were conducted at a fixed temperature of 30 K, both under various field cycling amplitudes and in constant magnetic field conditions to analyse time-dependent magnetization. The remanent magnetization values obtained after full magnetic cycles were normalized and compared with theoretical predictions based on the extended critical state model. Additionally, magnetic relaxation curves were recorded at 30 K to evaluate flux creep characteristics. A clear logarithmic decay in magnetization was observed, indicating the coexistence of at least two distinct pinning regimes. These results contribute to a deeper understanding of flux dynamics and magnetic stability in Bi-2223/Ag PIT tapes for practical superconducting applications.

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.