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Interaction between superconducting vortices and Bloch wall in ferrite garnet film

J. I. Vestgarden·D. V. Shantsev·A. A. F. Olsen·Y. M. Galperin·V. V. Yurchenko·P. E. Goa·T. H. Johansen
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Abstract

Interaction between a Bloch wall in a ferrite-garnet film and a vortex in a superconductor is analyzed in the London approximation. Equilibrium distribution of vortices formed around the Bloch wall is calculated. The results agree quantitatively with magneto-optical experiment where an in-plane magnetized ferrite-garnet film placed on top of NbSe2 superconductor allows observation of individual vortices. In particular, our model can reproduce a counter-intuitive attraction observed between vortices and a Bloch wall having the opposite polarity. It is explained by magnetic charges appearing due to discontinuity of the in-plane magnetization across the wall.

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J. I. Vestgarden, D. V. Shantsev, A. A. F. Olsen, Y. M. Galperin, V. V. Yurchenko, P. E. Goa, T. H. Johansen. 2007-03-15. Interaction between superconducting vortices and Bloch wall in ferrite garnet film. https://doi.org/10.1103/physrevlett.98.117002

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