Apparent permeability of ordered magnetically soft nanowire arrays

0563779 - FZÚ 2023 RIV US eng J - Journal Article
Ripka, P. - Hraková, D. - Mirzaei, M. - Kaman, Ondřej
Apparent permeability of ordered magnetically soft nanowire arrays.
AIP Advances. Roč. 12, č. 3 (2022), č. článku 035128. E-ISSN 2158-3226
R&D Projects: GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : permalloy * nanowire array * magnetic field sensor * finite element method
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.6, year: 2022
Method of publishing: Open access

Using the equivalent 2D model for finite element method (FEM) we calculated apparent permeability mu(a) and demagnetization factor D for permalloy nanowire and microwire arrays. The simulation results were verified by 3D FEM for arrays up to 3000 wires and experimentally for very large arrays containing up to 40 million wires. We achieved mu(a) = 3 to 33 and coercivities H-c = 1 to 9 kA/m, which are low values for wire arrays. The mu(a) depends mainly on the array geometry, it can be increased by increasing the distance between wires (pitch) and the wire length-to-diameter ratio L/d.
Permanent Link: https://hdl.handle.net/11104/0335587