Domain-wall and reverse-domain superconducting states of a Pb thin-film bridge on a ferromagnetic BaFe12O19 single crystal

R. Werner; A. Yu. Aladyshkin; S. Guénon; J. Fritzsche; I. M. Nefedov; V. V. Moshchalkov; R. Kleiner; D. Koelle

doi:10.1103/PhysRevB.84.020505

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Domain-wall and reverse-domain superconducting states of a Pb thin-film bridge on a ferromagnetic BaFe12O19 single crystal

R. Werner, A. Yu. Aladyshkin, S. Guénon, J. Fritzsche, I. M. Nefedov, V. V. Moshchalkov, R. Kleiner, D. Koelle

DOI 10.1103/PhysRevB.84.020505 · Physical Review B

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Abstract

We report on imaging of the nonuniform superconducting states in a Pb thin-film bridge on top of a ferromagnetic BaFe12O19 single crystal with a single straight domain wall along the center of the bridge by low-temperature scanning laser microscopy. We have visualized domain-wall superconductivity (DWS) close to the critical temperature of Pb, when the Pb film above the domain wall acts as a superconducting path for the current. The evolution of the DWS signal with temperature and the external-field-driven transition from DWS to reverse-domain superconductivity was visualized.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.4	Pressure not reported	onset