MgPd2Sb: A Mg-based Heusler-type superconductor
M. J. Winiarski, G. Kuderowicz, K. Górnicka, L. S. Litzbarski, K. Stolecka, B. Wiendlocha, R. J. Cava, T. Klimczuk
DOI 10.1103/PhysRevB.103.214501 · Physical Review B
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Abstract
We report the synthesis and physical properties of a full Heusler compound, MgPd2Sb, which we found to show superconductivity below Tc=2.2K. MgPd2Sb was obtained by a two-step solid-state reaction method and its purity and cubic crystal structure [Fm−3m, a=6.4523(1)Å] were confirmed by powder x-ray diffraction. Normal and superconducting states were studied by electrical resistivity, magnetic susceptibility, and heat capacity measurements. The results show that MgPd2Sb is a type-II, weak coupling superconductor (λe−p=0.53). The observed pressure dependence of Tc (ΔTc/p≈–0.23K/GPa) is one of the strongest reported for a superconducting Heusler compound. The electronic structure, phonons, and electron-phonon coupling in MgPd2Sb were theoretically investigated. The obtained results are in agreement with the experiment, confirming the electron-phonon coupling mechanism of superconductivity. We compare the superconducting parameters to those of all reported Heusler-type superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.2 | Pressure not reported | onset |
| MgPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | zero_resistance |
| MgPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.15 | Pressure not reported | onset |
| MgPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | midpoint |
| MgPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.95 | Pressure not reported | midpoint |
| YPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| LiGa2Rh Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
| LiPd2Ge Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.96 | Pressure not reported | unknown |
| YPd2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.85 | Pressure not reported | unknown |
| LuPt2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.45 | Pressure not reported | unknown |
| ZrPd2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.4 | Pressure not reported | unknown |
| HfPd2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.66 | Pressure not reported | unknown |
| ZrPd2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.19 | Pressure not reported | unknown |
| HfPd2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.86 | Pressure not reported | unknown |
| ScPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | unknown |
| YPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.7 | Pressure not reported | unknown |
| LuPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.8 | Pressure not reported | unknown |
| ScPd2Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
| YPd2Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
| LuPd2Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
| ErPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.17 | Pressure not reported | unknown |
| TmPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.82 | Pressure not reported | unknown |
| YbPd2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.46 | Pressure not reported | unknown |
| TmPd2Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | unknown |
| YbPd2Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.8 | Pressure not reported | unknown |
| ZrNi2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.38 | Pressure not reported | unknown |
| HfNi2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.74 | Pressure not reported | unknown |
| ZrNi2Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.85 | Pressure not reported | unknown |
| HfNi2Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.12 | Pressure not reported | unknown |
| ScPdAuAl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| ScPtAuIn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.96 | Pressure not reported | unknown |
| YPdAuIn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.6 | Pressure not reported | unknown |
| ScAu2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.4 | Pressure not reported | unknown |
| NbNi2Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.15 | Pressure not reported | unknown |
| NbNi2Ga Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.54 | Pressure not reported | unknown |
| ScAu2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3 | Pressure not reported | unknown |
| YAu2In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.74 | Pressure not reported | unknown |
| YPd2Sb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.85 | Pressure not reported | unknown |
| NbNi2Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.9 | Pressure not reported | unknown |
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