An experimental analysis from the magnetic interactions in nanowire arrays

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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-

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摘要：

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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An experimental analysis from the magnetic interactions in nanowire arrays

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