Local magnetic response of superconducting Sr2RuO4 thin films
G. M. Ferguson, Hari P. Nair, Nathaniel J. Schreiber, Ludi Miao, Kyle M. Shen, Darrell G. Schlom, Katja C. Nowack
DOI 10.1103/PhysRevB.110.144510 · Physical Review B
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Abstract
We conduct local magnetic measurements on superconducting thin-film samples of Sr2RuO4 using scanning superconducting quantum interference device (SQUID) susceptometry. From the diamagnetic response, we extract the magnetic penetration depth, λ, which exhibits a quadratic temperature dependence at low temperatures. In high-purity bulk samples, a similar quadratic temperature dependence has been attributed to nonlocal electrodynamics. Although we cannot exclude nonlocal effects, our analysis indicates that in our thin-film samples the presence of scattering is sufficient to explain the temperature dependence of λ. While we observe micron-scale variations in the diamagnetic response and superconducting transition temperature, the form of the temperature dependence of λ is independent of position. The growth and local characterization of superconducting thin-film Sr2RuO4 samples demonstrated here is a first step toward device-based tests of the superconducting order parameter in Sr2RuO4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.9 | Pressure not reported | onset |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.85 | Pressure not reported | onset |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.24 | Pressure not reported | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.7 | Pressure not reported | unknown |
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