Superconductivity and Field-Induced Magnetism in SrFe1.75Co0.25As2
R. Khasanov, A. Maisuradze, H. Maeter, A. Kwadrin, H. Luetkens, A. Amato, W. Schnelle, H. Rosner, A. Leithe-Jasper, H.-H. Klauss
DOI 10.1103/PhysRevLett.103.067010 · Physical Review Letters
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Abstract
Using muon-spin rotation, we studied the in-plane (λab) and the out of plane (λc) magnetic field penetration depth in SrFe1.75Co0.25As2 (Tc≃13.3 K). The penetration depth anisotropy γλ=λc/λab increases from γλ≃2.1 at Tc to 2.7 at 1.6 K. The mean internal field in the superconducting state increases with decreasing temperature, just opposite to the diamagnetic response seen in magnetization experiments. This unusual behavior suggests that the external field induces a magnetic order which is maintained throughout the whole sample volume.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrFe1.75Co0.25As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.3 | Pressure not reported | unknown |
| SrFe1.75Co0.25As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.3 | Pressure not reported | unknown |
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