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Superconducting Pinning by Magnetic Domains in a Ferromagnet-Superconductor Bilayer

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Cieplak M., Adamus Z., Konczykowski M., Chen X., Byczuk A., Abal'oshev A., Sang H., Chien C.

Acta Physica Polonica A

2004

vol. 106

issue 5

693-698

The local flux profile and the critical current are studied using an array of Hall sensors in a ferromagnetic-superconducting bilayer which consists of niobium film covering ferromagnetic Co/Pt multilayer with perpendicular magnetic anisotropy. The results indicate about threefold enhancement of the flux pinning in niobium layer caused by the isolated magnetic domains which are created during the magnetization reversal of the Co/Pt multilayer. The geometrical barrier is absent, and the critical current is strongly peaked in close vicinity to the sample center, suggesting that the critical state differs from that predicted by the Bean model.

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1 Acta Physica Polonica A

1 2004

1 Abal'oshev A.

1 Adamus Z.

1 Byczuk A.

1 Chen X.

1 Chien C.

1 Cieplak M.

1 Konczykowski M.

1 Sang H.

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Superconducting Pinning by Magnetic Domains in a Ferromagnet-Superconductor Bilayer