<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>In this paper, we present the calculation of thermal magnetic viscosity based on numerical simulations of relaxation isotherms curves for a Stoner–Wohlfarth ensemble. The Stoner–Wohlfarth particles is described by two equilibrium states and thermal activation is done by overcoming the energy barrier. For simulations we have used a new Preisach type model for Patterned Media, which takes into account the effects of time and temperature. The magnetization of the system is treated using the Preisach Model for Patterned Media with bimodal interactions field distributions. We have simulated relaxation curves starting from different points on the negative region of the descending branch of the major hysteresis loop and from the obtained data we evaluated the thermal fluctuation field. The results obtained for the linear energy barrier were compared with the non-linear energy barrier.</p>
</abstract>

In this paper, we present the calculation of thermal magnetic viscosity based on numerical simulations of relaxation isotherms curves for a Stoner–Wohlfarth ensemble. The Stoner–Wohlfarth particles is described by two equilibrium states and thermal activation is done by overcoming the energy barrier. For simulations we have used a new Preisach type model for Patterned Media, which takes into account the effects of time and temperature. The magnetization of the system is treated using the Preisach Model for Patterned Media with bimodal interactions field distributions. We have simulated relaxation curves starting from different points on the negative region of the descending branch of the major hysteresis loop and from the obtained data we evaluated the thermal fluctuation field. The results obtained for the linear energy barrier were compared with the non-linear energy barrier.

The Relaxation Effects in the Preisach - Néel Model of Patterned Media

“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine

Department of Exact Sciences, Faculty of Horticulture

BULETINUL INSTITUTULUI POLITEHNIC DIN IAȘI. Secția Matematica. Mecanică Teoretică. Fizică

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

{"article-title":"The Relaxation Effects in the Preisach - Néel Model of Patterned Media"}

In this paper, we present the calculation of thermal magnetic viscosity based on numerical simulations of relaxation isotherms curves for a Stoner–Wohlfarth...

The Relaxation Effects in the Preisach - Néel Model of Patterned Media

Pubblicato online: 03 mar 2022

Pagine: 9 - 18

Ricevuto: 05 mar 2021

Accettato: 16 apr 2021

DOI: https://doi.org/10.2478/bipmf-2021-0006

Parole chiave
Preisach Model for Patterned Media, Preisach – Néel model, magnetization relaxation, thermal magnetic viscosity, linear energy barrier, nonlinear energy barrier

© 2021 Ana Cazacu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The Relaxation Effects in the Preisach - Néel Model of Patterned Media

Pubblicato online: 03 mar 2022

Pagine: 9 - 18

Ricevuto: 05 mar 2021

Accettato: 16 apr 2021

DOI: https://doi.org/10.2478/bipmf-2021-0006

Parole chiavePreisach Model for Patterned Media, Preisach – Néel model, magnetization relaxation, thermal magnetic viscosity, linear energy barrier, nonlinear energy barrier

© 2021 Ana Cazacu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Parole chiave
Preisach Model for Patterned Media, Preisach – Néel model, magnetization relaxation, thermal magnetic viscosity, linear energy barrier, nonlinear energy barrier