Pressure dependence of superconductivity in amorphous ZrxNi100−x alloys
F. Mahini, F. S. Razavi, Z. Altounian
DOI 10.1103/PhysRevB.39.4677 · Physical Review B
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Abstract
The pressure dependence of superconducting transition temperature Tc of amorphous ZrxNi100−x alloys (x=80, 71, 67, 63.5 60, 55) has been studied under quasihydrostatic pressure to 8 GPa. For amorphous samples having Zr concentration x>60, ∂Tc/∂p is possitive in sign and it decreases nonlinearly with increasing x, whereas ∂Tc/∂P is negative in sign for 55 at. % Zr concentration. These results were explained in terms of character change of the conduction carriers at the Fermi surface. In addition, for Zr80Ni20 we observed the formation of the ω-Zr phase for pressures greater than 2 GPa.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Zr80Ni20 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.97 | Pressure unresolved | midpoint |
| Zr71Ni29 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.24 | Pressure unresolved | midpoint |
| Zr67Ni33 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.88 | Pressure unresolved | midpoint |
| Zr63.5Ni36.5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.56 | Pressure unresolved | midpoint |
| Zr60Ni40 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.35 | Pressure unresolved | midpoint |
| Zr55Ni45 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.83 | Pressure unresolved | midpoint |
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