Synthesis of superconducting hcp-ZrH3 under high hydrogen pressure
Mikhail A. Kuzovnikov, Vladimir E. Antonov, Valery I. Kulakov, Vitaly D. Muzalevsky, Nikita S. Orlov, Andrey V. Palnichenko, Yury M. Shulga
DOI 10.1103/PhysRevMaterials.7.024803 · Physical Review Materials
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Abstract
Zirconium trihydride and, for comparison, trideuteride with hexagonal close-packed (hcp) metal lattices were synthesized at a hydrogen/deuterium pressure of 9 GPa and a temperature of 873 K using toroid-type high-pressure chambers. After a rapid cooling (quenching) to 100 K and lowering the pressure to atmospheric, the quenched sample was removed from the chamber and studied by hot extraction analysis, powder x-ray diffraction, and ac magnetic susceptometry. The hot extraction showed that thermal decomposition of both hcp-ZrH3 and hcp-ZrD3 in vacuum begins after heating at a rate of 10 K/min to ∼200 K and almost ceases at 270 K, leaving tetragonal ɛ−ZrH2/ɛ−ZrD2 as a result. The x-ray diffraction study at 85 K gave lattice parameters a=3.443(2)Å and c=5.964(4)Å for hcp-ZrH3 and somewhat smaller values of a=3.430(5)Å and c=5.947(5)Å for hcp-ZrD3. The measurements of magnetic susceptibility revealed superconductivity with an onset at 11.6(1) K for hcp-ZrH3 and 9.5(2) K for hcp-ZrD3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| ZrH3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.6 | Pressure unresolved | onset |
| ZrD3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.5 | Pressure unresolved | onset |
| CeH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 57 | Pressure not reported | unknown |
| CeH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 115 | Pressure not reported | unknown |
| ThH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 146 | Pressure not reported | unknown |
| ThH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 160 | Pressure not reported | unknown |
| CaH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 215 | Pressure not reported | unknown |
| YH6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 220 | Pressure not reported | unknown |
| YH9 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 243 | Pressure not reported | unknown |
| LaH10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 255 | 150 GPa | unknown |
| PdH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
| TiH0.71 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.3 | Pressure not reported | unknown |
| MoH1.2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.92 | Pressure not reported | unknown |
| Th4H15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.2 | Pressure not reported | unknown |
| Zr4H15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | 40 GPa | unknown |
| ZrH3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.4 | 40 GPa | unknown |
| ZrH3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.7 | Pressure not reported | unknown |
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