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Type: Artigo
Title: Magnetic Interactions In Compositionally Modulated Nanowire Arrays
Author: Palmero
Ester M.; Beron
Fanny; Bran
Cristina; del Real
Rafael P.; Vazquez
Abstract: Series of high hexagonally ordered compositionally modulated nanowire arrays, with different Cu layer and FeCoCu segment thicknesses and a constant diameter of 35 nm, were fabricated by electroplating from a single electrolytic bath into anodic aluminum oxide membranes. The objective of the study was to determine the influence of ferromagnetic (FM) segment and non-ferromagnetic (NFM) layer thickness on the magnetic properties, particularly coercivity and magnetic interactions. First-order reversal curve (FORC) measurements and simulations were performed to quantify the effect of the inter-/intra-nanowire magnetostatic interactions on the coercivity and interaction field distributions. The FORC coercivity increases for a thick NFM layer and long FM segments due to decoupling of the the FM segments and the increased shape anisotropy, respectively. On the other hand, the interaction field presents a parallel strong reduction for a thick NFM layer and thin FM segments, which is ascribed to a similar NFM/FM thickness ratio and degree of FM segment decoupling along the nanowire.
Subject: Cylindrical Nanowire
Compositional Modulation
First-order Reversal Curve (forc)
Magnetic Interactions
Editor: IOP Publishing Ltd
Rights: fechado
Identifier DOI: 10.1088/0957-4484/27/43/435705
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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