The levitation force and stiffness enhancement of single domain GdBCO bulk superconductor by an axial background magnetic field

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-05-03 DOI:10.1016/j.physc.2024.1354516

Yijin Zhao, Jiaqi Wang, Wanmin Yang, Jing Chen, Jiarui Liu

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引用次数: 0

Abstract

How to improve the levitation force (F_L) and its stiffness between a permanent magnet and a REBCO bulk superconductor is one of the most key and attractive problems to be solved for practical applications. In this paper, we provided a novel hybrid magnet added superconductor system (HMS) to enhance the levitation force and the stiffness, the HMS sample is assembled by a single domain GdBCO bulk with an attached permanent magnet (PM) serving as an axial background magnetic field. The results indicate that (1) the F_L increased first and decreased then with the increase of the PM diameter (d_PM), the largest F_L is achieved when the d_PM approaches the diameter of the GdBCO bulk, F_L has been improved up to 152% with a thinner PM; (2) the F_L increased with the increase of the PM thickness and saturated at a certain value, F_L have been improved up to 168% with a thicker PM; (3) the stiffness of F_L has been improved up to 187% and 201% with the increase of the PM diameter and thickness; (4) the F_L and its stiffness enhancement dependent on the positive trapped field of the field cooled HMS samples. The results are of great significance to improve the performance and stability of maglev systems, the mechanism for enhancing the levitation force and stiffness property has been investigated in details.

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轴向背景磁场对单畴 GdBCO 块状超导体悬浮力和刚度的影响

如何提高永磁体与 REBCO 体块超导体之间的悬浮力（FL）及其刚度，是实际应用中亟待解决的最关键、最具吸引力的问题之一。本文提供了一种新型混合磁体添加超导体系统（HMS）来增强悬浮力和刚度，HMS 样品由单畴 GdBCO 块体与作为轴向背景磁场的附加永磁体（PM）组装而成。结果表明：（1）随着永磁体直径（dPM）的增大，浮力先增大后减小，当 dPM 接近 GdBCO 块体的直径时，浮力最大；永磁体变薄时，浮力提高了 152%；(3) 随着 PM 直径和厚度的增加，FL 的刚度分别提高了 187% 和 201%；(4) FL 及其刚度的提高取决于场冷却 HMS 样品的正陷场。这些结果对提高磁悬浮系统的性能和稳定性具有重要意义，并详细研究了磁悬浮力和刚度特性的增强机理。

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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.