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Superconductivity inTi67Zr19Nb11.5Sn2.5shape memory alloy
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-07-21 , DOI: 10.1103/physrevmaterials.5.074802
M. Egilmez 1 , O. Batal 2 , W. Abuzaid 2 , Z. Salman 3 , M. Alkhader 2 , H. Akamine 4 , M. Nishida 4 , J. W. A. Robinson 5
Affiliation  

Shape memory alloys (SMAs) exhibit unique functionalities due to their superelastic and shape memory properties. The ability to program and alter their shapes following a thermomechanical stimulus makes them highly important materials for a vast number of applications in the aerospace, automotive, biomedical, and robotic sectors. Research on SMAs has largely focused on metallurgical, mechanical, structural, or phase transformation properties. Here, we investigate the electrical, magnetic, and thermodynamic properties of the biocompatible SMA, Ti67Zr19Nb11.5Sn2.5 (at. %). In particular, we report the discovery of a superconducting phase transition with a critical temperature of 4.65 K with 0 K critical magnetic fields of Hc1=13.7mT and Hc2=9.2T. From the temperature dependence of the specific heat and local magnetic field measurements using transverse field muon spin rotation, we also determine a superconducting coherence of 6 nm and a London penetration depth of 776 nm. The results are key towards the development of cryogenic electrical device applications of SMA materials.

中文翻译:

Ti67Zr19Nb11.5Sn2.5形状记忆合金的超导性

形状记忆合金 (SMA) 由于其超弹性和形状记忆特性而表现出独特的功能。在热机械刺激下编程和改变其形状的能力使它们成为航空航天、汽车、生物医学和机器人领域的大量应用中非常重要的材料。对 SMA 的研究主要集中在冶金、机械、结构或相变特性上。在这里,我们研究了生物相容性 SMA 的电、磁和热力学特性,671911.52.5(在。 %)。特别是,我们报告了临界温度为 4.65 K、临界磁场为 0 K 的超导相变的发现。HC1=13.7公吨HC2=9.2. 根据使用横向场μ子自旋旋转的比热和局部磁场测量的温度依赖性,我们还确定了 6 nm 的超导相干性和 776 nm 的伦敦穿透深度。结果是开发 SMA 材料低温电气设备应用的关键。
更新日期:2021-07-21
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