Superconducting and normal-state properties of the high-entropy alloy Nb-Re-Hf-Zr-Ti investigated by muon spin relaxation and rotation
K. Motla, P. K. Meena, Arushi, D. Singh, P. K. Biswas, A. D. Hillier, R. P. Singh
DOI 10.1103/PhysRevB.105.144501 · Physical Review B
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Abstract
Superconducting high entropy alloys (HEAs) are emerging as an exotic class of superconducting materials, providing a unique opportunity to understand the complex interplay of disorder and superconductivity. We report the synthesis and detail bulk and microscopic characterization of a Nb60Re10Zr10Hf10Ti10 HEA alloy using transport, magnetization, specific heat, and muon spin rotation/relaxation (μSR) measurements. Bulk superconductivity with transition temperature TC=5.7 K is confirmed by magnetization, resistivity, and heat capacity measurements. Zero-field μSR measurements confirm that the superconducting state preserves time-reversal symmetry, and transverse-field measurements show that the superfluid density is well described by an isotropic s-wave model.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb60Re10Zr10Hf10Ti10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.7 | Pressure not reported | unknown |
| Nb0.60Re0.10Zr0.10Hf0.10Ti0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | Pressure not reported | onset |
| Nb0.60Re0.10Zr0.10Hf0.10Ti0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.16 | Pressure not reported | midpoint |
| Nb0.60Re0.10Zr0.10Hf0.10Ti0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.03 | Pressure not reported | zero_resistance |
| Nb0.60Re0.10Zr0.10Hf0.10Ti0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.4 | Pressure not reported | unknown |
| Ta34Nb33Hf8Zr14Ti11 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.3 | Pressure not reported | unknown |
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