Micromagnetic Modelling of Hysteresis in Permalloy Thin Films with Non-Magnetic Defects - Archive ouverte HAL Access content directly
Journal Articles Applications of Modelling and Simulation Year : 2022

Micromagnetic Modelling of Hysteresis in Permalloy Thin Films with Non-Magnetic Defects

(1) , (2) , (1)
1
2

Abstract

In this paper, we present the results of numerical micromagnetic modelling of the domain wall pinning on non-magnetic defects in a ferromagnetic thin sheet of permalloy. We compared the influence of different distribution of non-magnetic inclusions on the magnetization reversal in case of uniaxial anisotropy. It is shown that the non-magnetic defects help to resolve vortex singularities and play a role of pinning states. It is demonstrated that the defects located on the sides of the sheet favor the transition into the single-domain state. By varying the in-plane anisotropy constant, we observed that the defects located in the center lead to higher coercivity, when the domain wall width is comparable to the size of the sample, but narrowing of domain wall width leads to a change of energetically favorable distribution of defects and the highest is when defects are located on the sides. It is shown that the defects located in the corner of the sheet serve as nucleation points for the magnetization reversal process and have a lower threshold for unpinning of the domain walls.
Fichier principal
Vignette du fichier
AMS-Micromagnetic_modelling_of_permalloy_accepted.pdf (1021.3 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03876190 , version 1 (28-11-2022)

Licence

Attribution - CC BY 4.0

Identifiers

  • HAL Id : hal-03876190 , version 1

Cite

Inna Lobanova, Stéphane Labbé, Stéphane Despréaux. Micromagnetic Modelling of Hysteresis in Permalloy Thin Films with Non-Magnetic Defects. Applications of Modelling and Simulation, 2022, 6, pp.115-121. ⟨hal-03876190⟩
0 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More