Modelling and measurement of magnetically soft nanowire arrays for sensor applications

Ripka, P.; Grim, V.; Mirzaei, M.; Hraková, D.; Uhrig, J.; Emmerich, F.; Thielemann, C.; Hejtmánek, Jiří; Kaman, Ondřej; Tesař, Roman

doi:https://dx.doi.org/10.3390/s21010003

Number of the records: 1

Modelling and measurement of magnetically soft nanowire arrays for sensor applications

1.

SYSNO ASEP	0541691
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Modelling and measurement of magnetically soft nanowire arrays for sensor applications
Author(s)	Ripka, P. (CZ) Grim, V. (CZ) Mirzaei, M. (CZ) Hraková, D. (CZ) Uhrig, J. (DE) Emmerich, F. (DE) Thielemann, C. (DE) Hejtmánek, Jiří (FZU-D)_{RID, ORCID} Kaman, Ondřej (FZU-D)_{RID, ORCID} Tesař, Roman (FZU-D)_{RID, ORCID}
Number of authors	10
Article number	3
Source Title	Sensors. - : MDPI Roč. 21, č. 1 (2021)
Number of pages	17 s.
Language	eng - English
Country	CH - Switzerland
Keywords	magnetic nanowires ; soft magnetic wires ; magnetic sensors
Subject RIV	JJ - Other Materials
OECD category	Nano-materials (production and properties)
R&D Projects	EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Open access
Institutional support	FZU-D - RVO:68378271
UT WOS	000606671000001
EID SCOPUS	85098529616
DOI	10.3390/s21010003
Annotation	Soft magnetic wires and microwires are currently used for the cores of magnetic sensors. Due to their low demagnetization, they contribute to the high sensitivity and the high spatial resolution of fluxgates, Giant Magnetoimpedance (GMI), and inductive sensors. The 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 us to solve these large arrays with acceptable accuracy.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2022
Electronic address	http://hdl.handle.net/11104/0319222

Number of the records: 1