An experimental analysis from the magnetic interactions in nanowire arrays
2025-04-30
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An experimental analysis from the magnetic
interactions in nanowire arrays
Wibson W. G. Silva1, Adrielson de A. Dias2, Alexandre R. Rodrigues3,
Francisco E. Ch´avez4, Rafael A. de Oliveira1,2and Jos´e Holanda1,2,∗
1Programa de P´os-Gradua¸c˜ao em Engenharia F´ısica, Universidade Federal Rural de
Pernambuco, 54518-430, Cabo de Santo Agostinho, Pernambuco, Brazil
2Unidade Acadˆemica do Cabo de Santo Agostinho, Universidade Federal Rural de
Pernambuco, 54518-430, Cabo de Santo Agostinho, Pernambuco, Brazil
3Departamento de F´ısica, Universidade Federal de Pernambuco, 50670-901 Recife,
Pernambuco, Brazil
4Facultad de Biolog´ıa, Universidad Michoacana de San Nicolas de Hidalgo, Av. F. J.
Mujica s/n Cd. Universitaria, Morelia, Michoac´an, M´exico
Abstract
We study the magnetic interactions experimentally in nanostructures of nanowire
arrays. The intensity value obtained from the interactions provides information
about its magnetic behavior. We observed two types of experimental magnetic
behavior, i. e., demagnetized and magnetized. Our approach represents the first
experimental way to analyze the magnetic behavior of a nanostructure consider-
ing its magnetic dependence, which is very important for applications in sensors,
for example.
Keywords: Energy, experimental, interactions, nanostructures, nanowires
∗Corresponding author: joseholanda.silvajunior@ufrpe.br
Preprint submitted to ArXiv October 25, 2022
arXiv:2210.12783v1 [cond-mat.mes-hall] 23 Oct 2022
Many research groups investigate the magnetic properties of nanometric sys-
tems [1-8]. Such interest is due particularly to the magnetic interactions that
influence the properties of nanostructures [9-13]. As it is well known, mag-
netic interactions lead to complex phenomena that are far from well understood
[14-16]. One of the methods used to analyze these effects is the magnetiza-
tion process. Such a process produces the remanent magnetization used as a
source of information about the intensity value from the interactions [17-22].
One can manipulate the magnetic interactions using the remanent state by the
∆m curves. Such ∆m curves are comparisons between isothermal remanent
magnetization (IRM(H)) and direct current demagnetization (DCD(H)) curves
[23-28].
In this Letter, we present an experimental analysis to determine the intensity
value from the magnetic interactions in nanowire arrays electrodeposited on an-
odic aluminum oxide (AAO) membranes. We electrodeposited the nanowires of
different materials (permalloy, iron, and cobalt) and interpreted the experimen-
tal results considering the angular dependence from the interactions. Through
our analysis we detected two types of magnetic behavior: demagnetized and
magnetized. The demagnetized state refers to the process in which the predom-
inant interactions are demagnetizing (PID). On the other hand, the magnetized
state is when the predominant interactions are magnetizing (PIM). This type
of analysis is of fundamental importance for applications in devices dependent
on magnetic behavior [1, 3, 6].
In the Fig. 1 we present an illustration of a hexagonal distribution of
nanowire arrays electrodeposited in membranes of anodic aluminum oxide (AAO),
as in Refs. [3], [4] and [5]. We also define in Fig. 1 the θand θHangles,
which are the angles that the magnetization and magnetic field respectively
make with the axis of the nanowires during the measurements of IRM(H) and
DCD(H) curves, which were performed by using a Vibrating Sample Magne-
tometer (VSM) model EV7 at room temperature. The polycrystalline nanowire
(permalloy, iron, or cobalt) arrays were electrodeposited onto AAO membranes.
We manufacture some samples, i. e, eletrodeposited membranes with pore di-
2
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AnexperimentalanalysisfromthemagneticinteractionsinnanowirearraysWibsonW.G.Silva1,AdrielsondeA.Dias2,AlexandreR.Rodrigues3,FranciscoE.Chavez4,RafaelA.deOliveira1;2andJoseHolanda1;2;1ProgramadePos-Graduac~aoemEngenhariaFsica,UniversidadeFederalRuraldePernambuco,54518-430,CabodeSantoAgostinho,P...
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时间：2025-04-30
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