Upper critical field of Ti and α−TiAl alloys: Evidence of an intrinsic type-II superconductivity in pure Ti
Liu Shumei, Zhang Dianlin, Jing Xiunian, Lu Li, Li Shanlin, Kang Ning, Wu Xiaosong, J. J. Lin
DOI 10.1103/PhysRevB.62.8695 · Physical Review B
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Abstract
The upper critical field Hc2 of α−Ti1−xAlx(0<~x<~0.1) alloys has been investigated in detail. The behaviors can well be described by the theory of type-II superconductors. The electronic specific heat deduced from the superconducting properties is in excellent agreement with previous calorimetric measurements. However, the Fermi velocity obtained here is substantially lower than predicted by band calculation. The present work gives clear evidence that pure Ti is an intrinsic type-II superconducting element due to its very low renormalized Fermi velocity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ti Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.41 | Pressure not reported | unknown |
| Ti0.971Al0.029 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.49 | Pressure not reported | midpoint |
| Ti0.947Al0.053 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | midpoint |
| Ti0.898Al0.102 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.735 | Pressure not reported | midpoint |
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