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Magnetic pinning in a superconducting film by a ferromagnetic layer with stripe domains
Journal article   Open access   Peer reviewed

Magnetic pinning in a superconducting film by a ferromagnetic layer with stripe domains

D Mancusi, C Di Giorgio, F Bobba, A Scarfato, A M Cucolo, M Iavarone, S A Moore, G Karapetrov, V Novosad, V Yefremenko, …
Superconductor science & technology, v 27(12), pp 125002-8
31 Oct 2014
DOI: https://doi.org/10.1088/0953-2048/27/12/125002
url
https://www.osti.gov/biblio/1735514View
SubmittedOpen Access (License Unspecified),  Open

Abstract

critical current magnetic pinning stripe magnetic domains
A magnetic study of superconductor ferromagnet bilayers was performed by hysteresis loops and temperature-dependent magnetization measurements. The superconductor ferromagnet bilayers consist of a Nb film deposited on a Py film with weak perpendicular magnetic anisotropy. By comparing the temperature-dependent magnetization data obtained on samples with different ferromagnetic layer thickness, a decrease of the magnetic pinning with increasing thickness of the ferromagnetic layer has been found. This is confirmed by the reduction of the Nb film critical current density at low fields extracted by using the magnetic irreversibility of the hysteresis loops. The reduction of the pinning can be related to the increase of the stripe width in the ferromagnetic layer observed by magnetic force microscopy (MFM) measurements.

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Domestic collaboration
International collaboration
Web of Science research areas
Physics, Applied
Physics, Condensed Matter
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