Interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire studied via muon spin rotation
Meni Shay, Amit Keren, Gad Koren, Amit Kanigel, Oren Shafir, Lital Marcipar, Gerard Nieuwenhuys, Elvezio Morenzoni, Andreas Suter, Thomas Prokscha, Moshe Dubman, Daniel Podolsky
DOI 10.1103/PhysRevB.80.144511 · Physical Review B
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Abstract
We investigate the coupling between the magnetic and superconducting order parameters in an 8-m-long meander line (“wire”) made of a La1.94Sr0.06CuO4 film with a cross section of 0.5×100 μm2. The magnetic order parameter is determined using the low-energy muon spin relaxation technique. The superconducting order parameter is characterized by transport measurements and modified by high current density. We find that when the superconducting order parameter is suppressed by the current, the magnetic transition temperature, Tm, increases. The extracted sign and magnitude of the Ginzburg-Landau coupling constant indicate that the two orders are repulsive, and that our system is located close to the border between first- and second-order phase transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.94Sr0.06CuO4 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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