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

D Mancusi | Zendy; C. Di Giorgio | Zendy; F. Bobba | Zendy; Alessandro Scarfato | Zendy; A. M. Cucolo | Zendy; M. Iavarone | Zendy; Steven A. Moore | Zendy; G. Karapetrov | Zendy; V. Novosad | Zendy; V. Yefremenko | Zendy; S. Pace | Zendy; M. Polichetti | Zendy

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

Author(s) -

D Mancusi,

C. Di Giorgio,

F. Bobba,

Alessandro Scarfato,

A. M. Cucolo,

M. Iavarone,

Steven A. Moore,

G. Karapetrov,

V. Novosad,

V. Yefremenko,

S. Pace,

M. Polichetti

Publication year - 2014

Publication title -

superconductor science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.033

H-Index - 105

eISSN - 1361-6668

pISSN - 0953-2048

DOI - 10.1088/0953-2048/27/12/125002

Subject(s) - condensed matter physics , ferromagnetism , materials science , magnetization , magnetic force microscope , superconductivity , magnetic hysteresis , hysteresis , flux pinning , layer (electronics) , magnetic domain , magnetic anisotropy , magnetic field , high temperature superconductivity , physics , nanotechnology , quantum mechanics

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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