Abstract
We report the magneto-optical imaging for polycrystalline LaFeAsO0.95F0.05 and LaFeAsO0.892F0.108. We find a significant magneto-optical contrast with marked inhomogeneities and with a typical superconducting grain size ∼20–40μm. Although intergrain critical current density is negligibly small, intragrain critical current density obtained from magneto-optical image is about 1×105A/cm2 at 5K, which is smaller than other rare-earth-based iron-oxypnictide superconductors but is potentially attractive for technological applications.
Full Text
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call