Dynamic pressure effect on robust critical temperature (Tc) of MgB2 superconductor

IF 2.5 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-05-13 DOI:10.1016/j.jmmm.2025.173181

Rajkumar Sokkalingam , Abhishek Panghal , Susanta Sinha Roy , Arumugam Sonachalam

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引用次数: 0

Abstract

Highly versatile superconducting magnets find extensive use in numerous industries, such as industry, medicine, and research. Identification of materials that display outstanding stability in high temperatures and pressures is vital for practical applications, as most functional materials cannot keep their crystalline structure in such environments. To investigate this, experiments were conducted to recover shock waves on the MgB₂ superconductor. This work examined the material’s structural, morphological, and magnetic characteristics about three different shock pulse quantities: 0 (pristine), 50 shocks, and 100 shocks. The compounds had a hexagonal crystal structure with the P6/mmm space group, as shown by the powder X-ray diffraction (PXRD) pattern. In addition, the sample was analyzed using field emission scanning electron microscopy, which exhibited a distinct microstructure characterized by irregularly shaped hexagonal grains that can be attributed to the MgB₂ phase. Energy-dispersive X-ray spectroscopy (EDX) was employed to verify the elemental composition. Magnetic properties investigations were carried out on the superconducting MgB₂ material, with a critical temperature (T_c) of 39 K, using different magnetic fields and across a temperature spectrum from 2 to 45 K. The superconducting transition temperature (T_c = 39 K) of MgB₂ was proven to be persistent by observing hysteresis loops of magnetization at various temperatures.

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动态压力对MgB2超导体鲁棒临界温度（Tc）的影响

用途广泛的超导磁体广泛应用于许多行业，如工业、医药和研究。鉴定在高温高压下表现出优异稳定性的材料对于实际应用至关重要，因为大多数功能材料在这样的环境下无法保持其晶体结构。为此，对MgB2超导体进行了冲击波恢复实验。这项工作检查了三种不同的冲击脉冲量：0（原始），50和100冲击下材料的结构，形态和磁性特征。粉末x射线衍射（PXRD）结果表明，化合物具有P6/mmm空间基团的六方晶体结构。此外，利用场发射扫描电子显微镜对样品进行了分析，发现样品具有明显的微观结构，其特征是不规则形状的六角形晶粒，可归因于MgB2相。利用能量色散x射线光谱（EDX）对元素组成进行了验证。在临界温度（Tc）为39 K的条件下，在2 ~ 45 K的温度范围内，对超导MgB2材料进行了磁性能研究。通过观察不同温度下的磁化磁滞回线，证明了MgB2的超导转变温度（Tc = 39 K）是持续存在的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.