Inhomogeneous vortex distribution and magnetic coupling in oxide 
superconductor-ferromagnet hybrids

Albrecht, J.; Djupmyr, M.; Soltan, S.; Habermeier, H.-U.; Connolly, M. R.; Bending, S. J.

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Inhomogeneous vortex distribution and magnetic coupling in oxide superconductor-ferromagnet hybrids

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Albrecht, J.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;

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Soltan, S.
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Habermeier, H.-U.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;
Scientific Facility Thin Film Technology (Gennady Logvenov), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Bending, S. J.
Abteilung v. Klitzing, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Albrecht, J., Djupmyr, M., Soltan, S., Habermeier, H.-U., Connolly, M. R., & Bending, S. J. (2007). Inhomogeneous vortex distribution and magnetic coupling in oxide superconductor-ferromagnet hybrids. New Journal of Physics, 9: 379.

Cite as: https://hdl.handle.net/21.11116/0000-000E-B6B3-A

Abstract

Hybrid systems of thin films of oxide ferromagnets and high-temperature superconductors have been investigated by scanning Hall probe microscopy (SHPM) to analyze the local magnetic flux density distribution at low temperatures. In addition to the intrinsic properties of the films themselves, such structures exhibit novel phenomena due to complex interactions arising at the interface between them. The latter can be divided into processes originating from either electronic or magnetic coupling, respectively. As a direct consequence, the distribution of vortices in the superconductor is strongly influenced by the magnetic background arising from the ferromagnet. The local magnetic information obtained from SHPM images provides clear evidence for the presence of a magnetic dipolar interaction between the magnetic domains of the ferromagnetic component and the vortex ensemble in the superconductor.