Loading reported materials and source evidence.
Compare preparation groups and their superconducting reports, with each paper's criteria and fitted quantities retained.
The papers describe nominal Nb:Sc:Ti:Zr = 1:1:1:1 and bcc/hcp phases. Annealed groups are held for four days in an evacuated quartz tube. As-cast has no annealing temperature. These labels describe processing conditions.
5 Oe · 800 Hz · measurement range 3-20 K. The source lists no 600 °C row.
| Preparation label | Reported Tc (K) |
|---|---|
| as-cast | 7.9 |
| 400 °C | 8.4 |
| 800 °C | 9.0 |
| 1000 °C | 8.7 |
Table 2 retains the upper-critical-field analysis context. Its Tc values are not assigned the calorimetry midpoint criterion.
| Preparation label | Tabulated Tc (K) |
|---|---|
| as-cast | 8.11 |
| 400 °C | 8.71 |
| 600 °C | 9.36 |
| 800 °C | 9.13 |
| 1000 °C | 9.03 |
These are distinct source reports. Matching preparation labels does not establish identical physical specimens across editions or assign a selected catalogue Tc to either phase. Measurement pressure is not supplied.
The authors fit magnetization onset (M) and resistivity onset (ρ) separately with WHH. Hc2(0) is an extrapolated source fit, rather than a measurement at 0 K.
| Preparation label | μ0 Hc2ᴹ(0) (T) | μ0 Hc2ρ(0) (T) |
|---|---|---|
| as-cast | 13.1 | 12.8 |
| 400 °C | 14.1 | 12.7 |
| 600 °C | 14.6 | 14.5 |
| 800 °C | 13.9 | 15.0 |
| 1000 °C | 14.3 | 14.5 |
γel and β include both bcc and hcp contributions. Hc1 uses a GL extrapolation; ξ, λGL and κ are source-derived GL estimates. λGL is a magnetic penetration depth in nm. Vickers hardness uses a 2.94 N load for 10 s.
| Source parameter | as-cast | 400 °C | 600 °C | 800 °C | 1000 °C |
|---|---|---|---|---|---|
| Tabulated Tc K | 8.11 | 8.71 | 9.36 | 9.13 | 9.03 |
| γel mJ/(mol·K²) | 6.47 | 6.79 | 5.77 | 5.46 | 6.62 |
| β mJ/(mol·K⁴) | 0.150 | 0.127 | 0.127 | 0.129 | 0.145 |
| μ0 Hc1(0) mT | 29.1 | 32.9 | 22.9 | 22.2 | 4.46 |
| μ0 Hc2ᴹ(0) T | 13.1 | 14.1 | 14.6 | 13.9 | 14.3 |
| αMᴹ | 1.7 | 1.8 | 1.4 | 1.3 | 1.3 |
| μ0 Hc2ρ(0) T | 12.8 | 12.7 | 14.5 | 15.0 | 14.5 |
| αMρ | 1.7 | 1.9 | 1.4 | 1.3 | 1.3 |
| ξGLᴹ(0) nm | 5.0 | 4.8 | 4.8 | 4.9 | 4.8 |
| λGLᴹ(0) nm | 137 | 128 | 159 | 161 | 405 |
| κGLᴹ | 27 | 27 | 33 | 33 | 84 |
| ξGLρ(0) nm | 5.1 | 5.1 | 4.8 | 4.7 | 4.8 |
| λGLρ(0) nm | 137 | 127 | 159 | 162 | 405 |
| κGLρ | 27 | 25 | 33 | 34 | 84 |
| Vickers hardness HV | 336(1) | 345(4) | 264(6) | 239(2) | 230(2) |
Original values are retained; unit typography is formatted for reading. Metadata keeps original unit tokens. Parentheses remain uninterpreted uncertainty notation; symbols without printed units retain no unit in the metadata.
Composition units are not printed in these tables. SEM phase volume fractions are separate from superconducting volume fractions. Shared composition values cited across papers do not count as independent experiments.
Separate 2023 source rows; chemical coefficients, lattice parameters, SEM volume fractions and source-derived VEC are retained independently.
| Preparation label | Reported phase | Nb | Sc | Ti | Zr | a Å | c Å | Phase volume vol.% | VEC |
|---|---|---|---|---|---|---|---|---|---|
| as-cast | bcc | 26.6(4) | 22.3(5) | 25.5(5) | 25.6(4) | 3.359(2) | Not listed | 57 | 4.04 |
| as-cast | hcp | 21.3(4) | 30(1) | 23.0(7) | 25.8(5) | 3.262(3) | 5.152(3) | 43 | 3.91 |
| 400 °C | bcc | 27.9(3) | 21.6(2) | 25.3(3) | 25.2(2) | 3.308(2) | Not listed | 57 | 4.06 |
| 400 °C | hcp | 22.1(5) | 32.3(9) | 21.3(5) | 24.2(2) | 3.252(1) | 5.131(1) | 43 | 3.90 |
| 800 °C | bcc | 33(1) | 15(1) | 32(1) | 20(1) | 3.325(1) | Not listed | 50 | 4.18 |
| 800 °C | hcp | 13(1) | 39.1(9) | 15.1(4) | 32.6(6) | 3.252(2) | 5.138(3) | 50 | 3.74 |
| 1000 °C | bcc | 39.0(8) | 4.2(6) | 38.0(6) | 18.9(8) | 3.360(1) | Not listed | 50 | 4.35 |
| 1000 °C | hcp | 2.6(7) | 56(1) | 7.3(7) | 34.1(5) | 3.260(1) | 5.141(2) | 50 | 3.47 |
Original phase composition coefficients and parenthetical uncertainty notation; no stoichiometric conversion or catalogue sample equivalence.
The 2024 text attributes bcc compositions to preceding study [46]. Its table is a source report, not an independently repeated composition measurement; 600 °C is not listed in the captured 2023 v1 Table 1.
| Preparation label | Reported phase | Nb | Sc | Ti | Zr | a Å | c Å |
|---|---|---|---|---|---|---|---|
| as-cast | bcc | 26.6(4) | 22.3(5) | 25.5(5) | 25.6(4) | 3.359(2) | Not listed |
| as-cast | hcp | 21.3(4) | 30(1) | 23.0(7) | 25.8(5) | 3.262(3) | 5.152(3) |
| 400 °C | bcc | 27.9(3) | 21.6(2) | 25.3(3) | 25.2(2) | 3.308(2) | Not listed |
| 400 °C | hcp | 22.1(5) | 32.3(9) | 21.3(5) | 24.2(2) | 3.252(1) | 5.131(1) |
| 600 °C | bcc | 29.1(6) | 19.1(4) | 29.8(9) | 22(1) | 3.314(1) | Not listed |
| 600 °C | hcp | 18.0(5) | 32(1) | 19(1) | 30.8(7) | 3.254(1) | 5.133(2) |
| 800 °C | bcc | 33(1) | 15(1) | 32(1) | 20(1) | 3.325(1) | Not listed |
| 800 °C | hcp | 13(1) | 39.1(9) | 15.1(4) | 32.6(6) | 3.252(2) | 5.138(3) |
| 1000 °C | bcc | 39.0(8) | 4.2(6) | 38.0(6) | 18.9(8) | 3.360(1) | Not listed |
| 1000 °C | hcp | 2.6(7) | 56(1) | 7.3(7) | 34.1(5) | 3.260(1) | 5.141(2) |
Four annealed groups have exponential gap fits and a residual γ term. The heat-jump normalization uses a calorimetry midpoint Tc. The as-cast transition is too broad for the source gap-ratio analysis.
| Source parameter | 400 °C | 600 °C | 800 °C | 1000 °C |
|---|---|---|---|---|
| Δ(0) meV | 1.16 | 1.73 | 1.84 | 1.66 |
| Residual γel′ mJ/(mol·K²) | 2.8 | 2.7 | 2.8 | 2.6 |
| 2Δ(0)/(kB Tc) | 3.22 | 4.43 | 4.85 | 4.56 |
| ΔCel/[(γel−γel′)Tc] | 1.63 | 2.83 | 3.97 | 2.68 |
Source fit and model-ratio estimates. Author discussion of possible strong coupling does not establish a global pairing classification or electron–phonon λ.
Read the gap-fit analysisRead the heat-jump analysisThe metadata includes 210 source-value cells, 9 explicitly unlisted cells and exact text-window locators. Repeated reports remain separate source cells. Selected catalogue properties and sample associations are unchanged.
Metadata SHA-256: e7422f5af6df9113db17c593b37bbe1509fe4bcb64cadf20ccafc2fa29133f27
Captured PDF SHA-256: 5ada9ca574ae87d4cb4f8004a77a1504ce483b26642fe93d941e2c5d28ebd257
Captured PDF SHA-256: 2640697191af7398cbd39cd16cf5bf5b89514ccfbe56b40ce9c79103b5415119
Current publication status, supplements and equivalence to retained ingestion bytes have not been checked.
Arc melting in argon on a water-cooled copper hearth; nominal Nb:Sc:Ti:Zr atomic ratio 1:1:1:1. Heat treatment at 400, 800 or 1000 °C for four days in an evacuated quartz tube.
Arc melting in argon on a water-cooled copper hearth; nominal Nb:Sc:Ti:Zr atomic ratio 1:1:1:1. Annealing at 400, 600, 800 or 1000 °C for four days in an evacuated quartz tube.
Figure 3(a) identifies Tc at ac-susceptibility diamagnetic onset. The ac setup uses 5 Oe at 800 Hz over 3–20 K. Resistivity zero is separately confirmed. The Table 1 values remain independent source expressions.
Cu-Kα XRD with least-squares lattice parameter evaluation. The source attributes chemical composition to EDX coupled with field-emission SEM and cites the preceding study. Table 1 prints composition coefficients without an explicit composition unit.
The text describes refined Tc from upper-critical-field analysis and M(T) diamagnetic-onset datasets analyzed with WHH. Resistivity transition onset yields a separate WHH channel. Table 2 values retain that Hc2-analysis context without assigning calorimetric midpoint or a common criterion across all probes.
The source extrapolates Hc1(0) with a Ginzburg–Landau model. Coherence length is calculated from Hc2(0); penetration depth uses Hc1(0) and the matching coherence-length channel; κ is their ratio. These are source-derived estimates, not direct length measurements or electron–phonon coupling.
Normal-state C/T versus T² fitting yields γel and β with both bcc and hcp contributions. Four annealed specimens receive exponential electronic-specific-heat gap fits plus a residual γ term attributed by the authors to hcp. The normalized heat-jump analysis explicitly uses transition midpoint Tc; this does not assign midpoint to the whole Table 2 Tc row.
Vickers indentation is measured on polished surfaces with a 2.94 N load for ten seconds. Parentheses in source hardness and lattice values are preserved without interpreting uncertainties.
The source obtains phase volume fractions from SEM images and phase compositions from EDX. Its Table 1 lists composition-derived valence electron concentration separately. These are source phase reports, not superconducting volume fractions or catalogued atomic models.