The interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire

Details The interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire The interaction between the magnetic and superconducting order parameters in a La1.94Sr0.06CuO4 wire

2009-06-11

arxiv.org/abs/0906.2047v3

Phys. Rev. B 80, 144511 (2009)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.80.144511

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 x 100 um^2. 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.

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