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Experimental demonstration of shrinkage of magnetic domains in a superconductor/ferromagnet bilayer

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Abstract:

The shrinkage of magnetic domains in a superconductor/ferromagnet bilayer is studied experimentally using Pb as a superconductor and a garnet film with maze domains as a ferromagnet. The effects of trapped flux in a superconductor and the pinning of magnetic domain boundaries are carefully minimized by using a high-quality Pb single crystal and an AC demagnetization technique. A temperature independent shrinkage of magnetic domains by a factor ~ 0.89 is obtained below the superconducting transition of Pb. The slightly suppressed shrinkage ratio as compared with the theoretical prediction can be explained by a finite gap between the Pb crystal and the garnet film.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/24/2/024015

Publication date: February 1, 2011

iop/sust/2011/00000024/00000002/art024015
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