Superconductivity in Ti67Zr19Nb11.5Sn2.5 shape memory alloy
M. Egilmez, O. Batal, W. Abuzaid, Z. Salman, M. Alkhader, H. Akamine, M. Nishida, J. W. A. Robinson
DOI 10.1103/PhysRevMaterials.5.074802 · Physical Review Materials
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Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ti67Zr19Nb11.5Sn2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.65 | Pressure not reported | onset |
| Ti67Zr19Nb11.5Sn2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.65 | Pressure not reported | onset |
| Ti67Zr19Nb11.5Sn2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.65 | Pressure not reported | onset |
| Ti67Zr19Nb11.5Sn2.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.65 | Pressure not reported | onset |
| AuZn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.21 | Pressure not reported | unknown |
| InTl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | unknown |
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