Large magnetic penetration depth and thermal fluctuations in a superconducting Ca10(Pt3As8)[(Fe1−xPtx)2As2]5 (x=0.097) single crystal
Jeehoon Kim, Filip Ronning, N. Haberkorn, L. Civale, E. Nazaretski, Ni Ni, R. J. Cava, J. D. Thompson, R. Movshovich
DOI 10.1103/PhysRevB.85.180504 · Physical Review B
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Abstract
We have measured the temperature dependence of the absolute value of the magnetic penetration depth λ(T) in a Ca10(Pt3As8)[(Fe1−xPtx)2As2]5 (x=0.097) single crystal using a low-temperature magnetic force microscope (MFM). We obtain λab(0)≈1000 nm via extrapolating the data to T=0. This large λ and pronounced anisotropy in this system are responsible for large thermal fluctuations and the presence of a liquid vortex phase in this low-temperature superconductor with a critical temperature of 11 K, consistent with the interpretation of the electrical transport data. The superconducting parameters obtained from λ and coherence length ξ place this compound in the extreme type II regime. Meissner responses (via MFM) at different locations across the sample are similar to each other, indicating good homogeneity of the superconducting state on a submicron scale.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ca10(Pt3As8)[(Fe1-xPtx)2As2]5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
| Ca10(Pt3As8)[(Fe1-xPtx)2As2]5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10 | Pressure not reported | unknown |
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