Apparent permeability of ordered magnetically soft nanowire arrays

0563779 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA MŠMT(CZ) LM2018096
Institucionální podpora: RVO:68378271
Klíčová slova: permalloy * nanowire array * magnetic field sensor * finite element method
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.6, rok: 2022
Způsob publikování: 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.
Trvalý link: https://hdl.handle.net/11104/0335587