大型振动线圈磁力计用于批量超导体的磁性表征
A Arsenault1, B Charpentier-Pépin1, A Forcier1
1Polytechnique Montréal, Montreal, Quebec H3T 1J4, Canada.
The Review of scientific instruments
|December 8, 2023
概括
一种新型的振动线圈磁力计在批量超导体中非破坏性地测量了临界电流密度. 这种多功能设备还可以在多种材料中特征磁矩,最高可达5特斯拉.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 磁力学 磁力学 是一种
背景情况:
- 在散装超导体中描述临界电流密度 (Jc) 对应用至关重要.
- 现有的Jc测量方法往往具有破坏性.
- 需要一种非破坏性的,多功能性的磁性表征工具.
研究的目的:
- 设计和验证振动线圈磁力计 (VCM),用于非破坏性Jc表征.
- 评估VCM在各种磁性材料中测量磁矩的能力.
- 为破坏性Jc测量技术提供替代方案.
主要方法:
- 用于VCM优化的有限元模拟.
- 校准与商业振动样品磁力计相比.
- 对Nd2Fe14B和YBa2Cu3O7-x样本的基准测试与歇斯底里测量.
- 从磁性歇斯底里循环中推断和推断临界电流密度.
主要成果:
- 该VCM已经成功设计,优化和校准.
- 在VCM和商业歇斯底里图谱测量之间发现了良好的一致性.
- 在77K时,VCM测量了YBa2Cu3O7-x的1T透场和4T不可逆转场.
- 取决于场的Jc被推断出来,并被用来通过模拟重现磁化曲线.
结论:
- 开发的VCM是一种可行的,非破坏性的工具,用于表征散装超导体.
- 该VCM证明了广泛适用于多种材料的磁性表征,高达5T.
- 这项工作为超导体研究和磁性材料分析提供了重大进展.
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