Magnetic behaviour of multisegmented FeCoCu/Cu electrodeposited nanowires



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Núñez, A. and Pérez García, Lucas and Abuin Herráez, Manuel and Araujo, J. P. and Proenca, M. P. (2017) Magnetic behaviour of multisegmented FeCoCu/Cu electrodeposited nanowires. Journal of physics D: applied physics, 50 (15). ISSN 0022-3727

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Understanding the magnetic behaviour of multisegmented nanowires (NWs) is a major key for the application of such structures in future devices. In this work, magnetic/non-magnetic arrays of FeCoCu/Cu multilayered NWs electrodeposited in nanoporous alumina templates are studied. Contrarily to most reports on multilayered NWs, the magnetic layer thickness was kept constant (30 nm) and only the non-magnetic layer thickness was changed (0 to 80 nm). This allowed us to tune the interwire and intrawire interactions between the magnetic layers in the NW array creating a three-dimensional (3D) magnetic system without the need to change the template characteristics. Magnetic hysteresis loops, measured with the applied field parallel and perpendicular to the NWs' long axis, showed the effect of the non-magnetic Cu layer on the overall magnetic properties of the NW arrays. In particular, introducing Cu layers along the magnetic NW axis creates domain wall nucleation sites that facilitate the magnetization reversal of the wires, as seen by the decrease in the parallel coercivity and the reduction of the perpendicular saturation field. By further increasing the Cu layer thickness, the interactions between the magnetic segments, both along the NW axis and of neighbouring NWs, decrease, thus rising again the parallel coercivity and the perpendicular saturation field. This work shows how one can easily tune the parallel and perpendicular magnetic properties of a 3D magnetic layer system by adjusting the non-magnetic layer thickness.

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© IOP Publishing Ltd.
FEDER; ON2 [Norte-070124-FEDER-000070]; FCT through the Associated Laboratory IN [UID/NAN/50024/2013, SFRH/BPD/84948/2012]; Spanish Ministerio de Economia y Competitividad [MAT2014-52477-C5-1-P, MAT2014-52477-C5-2-P]

Uncontrolled Keywords:Multilayer nanowires; Layer thickness; Giant magnetoresistance; Fabrication
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:42660
Deposited On:25 May 2017 17:31
Last Modified:13 Jun 2018 14:23

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