Superconductivity inTi67Zr19Nb11.5Sn2.5shape memory alloy,Physical Review Materials

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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,

{Ti}_{67} {Zr}_{19} {Nb}_{11.5} {Sn}_{2.5}

(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

H_{c 1} = 13.7 mT

and

H_{c 2} = 9.2 T

. 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，