Magnetic Characterization of Nanowire Arrays Using First Order Reversal Curves

Abstract

Arrays of Ni nanowires have been studied by means of first order reversal curves (FORC) diagrams. The dependence of the coercivity of the arrays as a function of the length of the nanowires has been experimentally investigated. We have shown that the FORC diagrams provide detailed information about the distribution of interactions and coercivities and allowed us to observe the reversible component of magnetization. Our results are in good agreement with analytical calculations obtained by means of a simple model. Index Terms-First order reversal curves (FORC), magnetic nanowires.

Tailoring the magnetic properties of cobalt antidot arrays by varying the pore size and degree of disorder

“…In these cases FORCs diagrams provide information about the coercivity distribution and interactions inside the system and the portions of reversible and irreversible magnetization [24,25]. This technique has been used to study diverse magnetic phenomena and systems [26,27,28,29,30,31,32].…”

Extracting Individual Properties from Global Behaviour: First-order Reversal Curve Method Applied to Magnetic Nanowire Arrays

“…This possibility makes the multilayer nanowire array particularly interesting for high frequency devices (Ye et al, 2007), especially circulators (Saib et al, 2001), although the initial goal of using multilayer nanowires was to obtain giant magnetoresistance devices (Blondel et al, 1994, Piraux et al, 1994Piraux et al, 2007). Despite the advantages of the FORC method for nanowire array characterisation, few studies exist on the subject (Spinu et al, 2004;Béron et al, 2006;Lavín et al, 2008;Peixoto & Cornejo, 2008;Béron et al, 2008b). This is mainly due to the lack of interpretative models suitable for highly interacting systems.…”

Magnetostatic interaction in soft magnetic bilayer ribbons unambiguously identified by first-order reversal curve analysis

“…In the FDiag, according to definition (2), this results in a pair of colored spots, which are blue-red (always blue color on the left) for k > 0 and red-blue for k < 0. 21 FDiag of positive or negative interactions within onephase systems [21][22][23][24] as well as for two positively coupled magnetic phases [25][26][27] are abundant in the literature. Nevertheless, round red-blue spots as that appearing in Fig.…”