Ti-Sn共掺杂对RHQT Nb3Al线超导性能的影响

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

Journal of Magnetism and Magnetic Materials Pub Date : 2025-06-15 DOI:10.1016/j.jmmm.2025.173305

Yuyao Zhang , Zhou Yu , Wenlong Li , Changkun Yang , Huaihao Zhang , Jiahao Ren , Hong Peng , Wentao Wang , Xiaguang Sun , Yong Zhao

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引用次数: 0

摘要

采用快速加热淬火相变（RHQT）法制备了Ti、Sn共掺杂Nb3Al超导导线。在前驱丝中掺杂不同数量的Ti和Sn，包括不同Ti/Sn比例的0.5%Ti - 1% Sn、1%Ti - 1% Sn、2%Ti - 1% Sn和固定Ti/Sn比例的0.25% Ti - 0.5% Sn、1%Ti - 2% Sn、2%Ti - 4% Sn。所有导线均由Nb3Al A15超导相组成，经RHQT处理后具有均匀的显微组织。纯样品相比,Jc Nb3Al样品掺杂0.5%钛1% Sn增加了52%,达到了最大值为1.1×105 a / cm2@4.2 K, 12 t .其他两个Nb3Al样品掺杂0.25% Ti Sn 0.5%和1%钛2% Sn Jc改善约50%在10 K, 8 t .钛的化学成分和Sn高度统一的原子比例接近1:2,这可能对应Ti6Sn5金属互化物基于Ti-Sn相图。在共掺Ti和Sn样品中，归一化通量钉扎力的峰值位置向更高的归一化场移动，表明点钉扎中心的贡献。因此，在Ti和Sn共掺Nb3Al样品中，Jc的改善可能是由于在超导基体中形成了纳米级的Ti6Sn5颗粒。在快速加热过程中，Ti和Sn原子溶解在Nb(Al)ss相中，然后在转变热处理过程中析出，在Nb3Al相中形成纳米级Ti6Sn5颗粒。

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Effect of Ti-Sn co-doping on the superconducting properties of RHQT Nb3Al wires

Nb₃Al superconducting wire co-doped with Ti and Sn elements was fabricated by rapid heating quenching, and transformation (RHQT) method. Various amounts of Ti and Sn were doped in the precursor wire, including 0.5%Ti 1% Sn, 1%Ti 1% Sn, 2%Ti 1% Sn with different Ti/Sn ratios, and 0.25% Ti 0.5% Sn, 1%Ti 2% Sn, 2% Ti 4% Sn with fixed Ti/Sn ratio. All the wires consist of Nb₃Al A15 superconducting phase and have a uniform microstructure after the RHQT process. Compared to the pure sample, the J_c of Nb₃Al sample doped with 0.5%Ti 1% Sn increased 52 %, reaching the maximum value of 1.1 × 10⁵A/cm²@4.2 K, 12 T. Other two Nb₃Al samples doped with 0.25% Ti 0.5 % Sn and 1% Ti 2% Sn showed J_c improvement of about 50 % at 10 K, 8 T. The chemical composition of Ti and Sn is highly uniform with the atomic ratio approximating 1:2, which might correspond to the Ti₆Sn₅ intermetallic compound based on the Ti-Sn phase diagram. In the Ti and Sn co-doped samples, the peak position of the normalized flux pinning force shifts to a higher normalized field, indicating the contribution of point pinning centers. Therefore, the improvement of J_c in the Ti and Sn co-doped Nb₃Al samples might be attributed to the formation of nano-sized Ti₆Sn₅ particles in the superconducting matrix. During the rapid heating process, the Ti and Sn atoms were dissolved in the Nb(Al)_ss phase, and then precipitated out during the transformation heat treatment to form nano-sized Ti₆Sn₅ particles in the Nb₃Al phase.

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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.