Superconductivity and vortex phases in the two-dimensional organic conductor λ−(BETS)2FexGa1−xCl4(x=0.45)
S. Uji, T. Terashima, Y. Terai, S. Yasuzuka, M. Tokumoto, H. Tanaka, A. Kobayashi, H. Kobayashi
DOI 10.1103/PhysRevB.71.104525 · Physical Review B
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Abstract
Resistance measurements have been performed in a two-dimensional organic conductor λ−(BETS)2FexGa1−xCl4(x=0.45) to investigate the superconducting properties. In magnetic field parallel to the layers, the superconducting (S) phase is stabilized in a wide magnetic field range, which is qualitatively understood by Jaccarino-Peter compensation mechanism. Depending on the internal field created by the Fe 3d moments, three vortex phases in the S phase appear with increasing field; normal vortex, antivortex, and normal vortex phases. The superconducting transitions show characteristic field dependence, which is correlated to the vortex phases. In field perpendicular to the layers, the S phase appears only near the antiferromagnetic phase. The results for x=0.45 are also compared with those for the isostructural nonmagnetic salt x=0.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| λ-(BETS)2FexGa1-xCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | midpoint |
| λ-(BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | unknown |
| λ-(BETS)2FeCl4 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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