Incorporation of Am into the superconductor-related phase Pr2CuO4
S. Skanthakumar, C. W. Williams, L. Soderholm
DOI 10.1103/PhysRevB.68.064510 · Physical Review B
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Abstract
Pr1.85Am.15CuO4 has been synthesized and found to have a structure consistent with the T′-phase electron superconductors. X-ray diffraction, x-ray-absorption spectroscopy studies, and magnetic-susceptibility results are all used to conclude that Am is tetravalent in this Cu-oxide host. Despite the hole doping of the parent Pr2CuO4 compound by Am4+, magnetic measurements show that the Pr1.85Am.15CuO4 sample does not superconduct, despite the observation that a Ce-doped sample made under the same condition exhibits a diamagnetic signal at low temperatures and small applied fields. The absence of superconductivity in the Am-doped sample is discussed in terms of a magnetic model for the suppression of Tc. The presence of Am4+ in this sample precludes the formation of Am1.85Ce.15CuO4, which has been predicted to superconduct.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | unknown |
| Pr1.85Am0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Am2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24 | Pressure not reported | unknown |
| La1.85Ba0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Cm1.85Th0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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