Domain-wall and reverse-domain superconducting states of a Pb thin-film   bridge on a ferromagnetic BaFe_{12}O_{19} single crystal
  We report on imaging of the nonuniform superconducting states in a Pb thin film bridge on top of a ferromagnetic BaFe_{12}O_{19} 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. 
R. Werner, A.Yu. Aladyshkin, S. Guenon, J. Fritzsche, I.M. Nefedov,   V.V. Moshchalkov, R. Kleiner, and D. Koelle
cond-mat.supr-con cond-mat.mes-hall