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Tailoring the magnetization states in 2D arrays of multiresponse ferromagnetic nanomagnets

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Abuin Herráez, Manuel and Maicas, Marco and García, M Ángel and Pérez García, Lucas and Mascaraque Susunaga, Arantzazu (2017) Tailoring the magnetization states in 2D arrays of multiresponse ferromagnetic nanomagnets. Journal of physics D: applied physics, 50 (48). ISSN 0022-3727

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Official URL: http://dx.doi.org/10.1088/1361-6463/aa929f


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Abstract

We have fabricated Fe52-54Co46-48 nanomagnet arrays as a function of several geometrical parameters like the spacing between nanostructures, the aspect ratio and the layers thicknesses. The nanomagnets consist in two magnetic layers, separated by a non magnetic interlayer, that interact through magnetostatic coupling. They present a multiresponse hysteresis loops with two different switching fields. We have performed micromagnetic simulations to discern the role play by the different interactions. The spacing in the array strongly modifies the saturating field along the short axis and the magnetization reversal mechanisms from coherent rotation to domain wall nucleation. A small asymmetry between the two magnetic layers favors a magnetization reversal mechanism along the long axis with two different switching fields. These fields can be tailored through the thickness of the layers or the inter-element spacing in the array. In trilayers with the same magnetic layer thicknesses, the asymmetry can be induced by growing the two magnetic layers with a different anisotropy. The well-defined reversal fields make these nanomagnets potentially useful for magnetic tagging.


Item Type:Article
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© IOP Publishing Ltd.
This work was funded by MINECO MAT2014-52477-C05-2-P, MAT2014-52477-C05- 2-PC01-2-P, MAT2013-48009-C4-1-P and PRI-PIBUS-2011-1182. Manuel Abuín acknowledges the UCM Campus of International Excellence (PICATA Program) for PhD fellowship.

Uncontrolled Keywords:Sensitivity; Element; Logic
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:45797
Deposited On:13 Dec 2017 19:15
Last Modified:06 Dec 2018 00:01

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