Maximizing flux pinning in YBCO coated conductor films for high-field applications

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI:10.1016/j.physc.2024.1354565

T. Vaimala , M.M. Aye , E. Rivasto , Y. Zhao , H. Huhtinen , P. Paturi

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引用次数: 0

Abstract

Our study explores the relationship between BZO nanorod density and magnetic flux pinning in YBCO thin films on coated conductor templates. We identified an optimal BZO doping level of 8%–10%, which maximizes flux pinning and enables the highest critical current densities to be achieved across various temperatures and magnetic field ranges, especially in new types of multilayer structures. Additionally, the formation of a $c$ -axis peak in the angular-dependent critical current curves at high BZO concentrations underscores the significance of collective pinning mechanisms. These results are discussed using a simple pinning model that considers the effects of nanorod spacing and fragmentation. Overall, our findings contribute to the development of high-performance coated conductor layer structures for future power applications, where maximizing flux pinning is essential.

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最大化 YBCO 涂层导体薄膜中的磁通钉，用于高电场应用

我们的研究探讨了涂覆导体模板上的 YBCO 薄膜中 BZO 纳米棒密度与磁通钉之间的关系。我们确定了 8%-10%的最佳 BZO 掺杂水平，它能最大限度地抑制磁通，并能在各种温度和磁场范围内实现最高临界电流密度，特别是在新型多层结构中。此外，在高浓度 BZO 的情况下，随角度变化的临界电流曲线中形成了一个 c 轴峰值，这凸显了集体引脚机制的重要性。我们使用一个简单的钉扎模型讨论了这些结果，该模型考虑了纳米棒间距和碎裂的影响。总之，我们的研究结果有助于为未来的电力应用开发高性能涂层导体层结构，在这种结构中，最大限度地实现磁通钉扎是至关重要的。

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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.