Towards universal magnetization curves in the superconducting state of RuSr2GdCu2O8
Thomas P. Papageorgiou, Hans F. Braun, Tobias Görlach, Marc Uhlarz, Hilbert v. Löhneysen
DOI 10.1103/PhysRevB.68.144518 · Physical Review B
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Abstract
The reported dc magnetization measurements on the magnetic (TM∼130K) superconductor (Tc∼30K) RuSr2GdCu2O8 (Ru-1212Gd) reveal a variety of behaviors below Tc. The fact that, for magnetometers which require sample motion during the measurements, artifacts can arise in the measured magnetic moment, when the movement of the sample is done in an inhomogeneous field, complicates even more the analysis of the existing data. In order to avoid the generation of artifacts, we did measurements on a stationary Ru-1212Gd sample employing a homemade magnetometer. The measured curves showed none of the suspicious “symptoms” present in the curves measured with a magnetometer employing sample movement, and if verified by measurements on stationary samples by other groups, a universal behavior in the superconducting state of Ru-1212Gd could be revealed by the dc magnetization measurements. Our considerations support the existence of bulk superconductivity for Ru-1212Gd.
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. | 30 | Pressure not reported | zero_resistance |
| RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50 | Pressure not reported | onset |
| RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
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