Tuning of the ferromagnetic and superconducting transitions by tin-doping in RuSr2GdCu2O8
A. C. McLaughlin, J. P. Attfield
DOI 10.1103/PhysRevB.60.14605 · Physical Review B
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Abstract
Solid solutions Ru1−xSnxSr2GdCu2O8 with nominal compositions x=0–0.4 have been prepared, although some secondary phases are also present. Powder x-ray diffraction and physical measurements show that Sn4+ substitutes only at the Ru sites in this layered material. Sn-doping suppresses the ferromagnetic moment in the ruthenate layers, and the Curie temperature decreases from 138 K in the undoped material to 78 K for x=0.4. This enhances the conductivity of the CuO2 planes and the onset of superconductivity increases from 36 K at x=0 to 48 K at x=0.2, but falls thereafter. This may reflect the increase in hole transfer to the CuO2 planes and the reduction of ferromagnetic order within the ruthenate layers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | onset |
| Ru0.9Sn0.1Sr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
| Ru0.8Sn0.2Sr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 48 | Pressure not reported | onset |
| Ru0.7Sn0.3Sr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
| Ru0.6Sn0.4Sr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | onset |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | unknown |
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