Pr4Fe2As2Te1−xO4: A layered FeAs-based superconductor
S. Katrych, K. Rogacki, A. Pisoni, S. Bosma, S. Weyeneth, R. Gaal, N. D. Zhigadlo, J. Karpinski, L. Forró
DOI 10.1103/PhysRevB.87.180508 · Physical Review B
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Abstract
We report crystal growth at high pressure, structure determination, and magnetic and transport studies of an oxypnictide superconductor Pr4Fe2As2Te1−xO4. Its structure resembles the known 1111 phase except for the considerably larger c lattice constant and intercalated tellurium atoms and it crystallizes in a tetragonal lattice [a = 4.0165(2) Å, c = 29.8572(16) Å, and space group I4/mmm (no. 139)]. The electrical resistivity ρ(T) and magnetization measurement show a transition at Tc≈25 K. The lower (Hc1) and upper (Hc2) critical fields are 2 mT and 6.5 T, respectively. The Ginzburg-Landau parameter of κ ≈ 80 places this compound in the family of strong type-II superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr4Fe2As2Te1-xO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
| Pr4Fe2As2Te1-xO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
| Pr4Fe2As2Te0.88O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
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