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Dipolar interactions in multilayered Co 0.96 Cu 0.04 /Cu nanowire arrays
Author(s) -
Medina J. De La Torre,
Darques M.,
Encinas A.,
Piraux L.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200723622
Subject(s) - nanowire , anisotropy , condensed matter physics , materials science , dipole , ferromagnetic resonance , magnetic field , polycarbonate , magnetic anisotropy , field (mathematics) , magnetic dipole–dipole interaction , ferromagnetism , nanotechnology , magnetization , optics , composite material , chemistry , physics , mathematics , organic chemistry , quantum mechanics , pure mathematics
Abstract Arrays of electrodeposited Co 0.96 Cu 0.04 /Cu nanowires into porous polycarbonate membranes have been characterized by ferromagnetic resonance measurements in order to study the effect of the dipolar interactions on the effective anisotropy field as a function of the magnetic and non magnetic layer thickness. It is found that breaking the infinite cylinder geometry reduces their shape anisotropy field, which can be modified to a large extent from 6.5 kOe for non layered nanowires down to nearly zero for layered nanowires with the thinnest magnetic layers. An analytical model is proposed to describe the magnetostatic interactions between magnetic layers and their effect on the total anisotropy field which shows a good agreement with the experiment. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)