Modelling and measurement of magnetically soft nanowire arrays for sensor applications,

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00344840" target="_blank" >RIV/68407700:21230/21:00344840 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/21:00541691

Result on the web

<a href="https://doi.org/10.3390/s21010003" target="_blank" >https://doi.org/10.3390/s21010003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s21010003" target="_blank" >10.3390/s21010003</a>

Result language

angličtina

Original language name

Modelling and measurement of magnetically soft nanowire arrays for sensor applications,

Original language description

Soft magnetic wires and microwires are currently used for the cores of magnetic sensors. Thanks to their low demagnetization, they contribute to the high sensitivity and the high spatial resolution of fluxgates, Giant Magnetoimpedance (GMI), and inductive sensors. Arrays of nanowires can be prepared by electrodeposition into predefined pores of a nanoporous polycarbonate membrane. While high coercivity arrays with square loops are convenient for information storage and for bistable sensors such as proximity switches, low coercivity cores are needed for linear sensors. We show that coercivity can be controlled by the geometry of the array: increasing the diameter of nanowires (20 µm in length) from 30 nm to 200 nm reduced the coercivity by a factor of 10, while the corresponding decrease in the apparent permeability was only 5-fold. Finite element simulation of nanowire arrays is important for sensor development, but it is computationally demanding. While an array of 2000 wires can be still modelled in 3D, this is impossible for real arrays containing millions of wires. We have developed an equivalent 2D model, which allows to solve these large arrays with acceptable accuracy. Using this tool we have shown that as a core of magnetic sensors, nanowires are efficiently employed only together with microcoils with diameter comparable to the nanowire length.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sensors

ISSN

1424-8220

e-ISSN

1424-8220

Volume of the periodical

21

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

1-17

UT code for WoS article

000606671000001

EID of the result in the Scopus database

2-s2.0-85098529616