Influence of thermal energy on exchange-bias studied by finite-element simulations

J. Dean; A. Kohn; A. Kovács; D. A. Allwood; D. Suess; T. Schrefl

doi:10.1063/1.4816664

Influence of thermal energy on exchange-bias studied by finite-element simulations

J. Dean, A. Kohn, A. Kovács, D. A. Allwood, D. Suess, T. Schrefl

Research output: Contribution to journal › Article › peer-review

Abstract

In this article we describe the thermal relaxation in anti-ferromagnetic/ ferromagnetic bilayers using a hybrid method that combines a kinetic Monte Carlo technique with magnetization dynamics following the Landau Lifshitz Gilbert equation. A granular anti-ferromagnetic layer is exchange coupled to an amorphous ferromagnetic layer and discretized using a finite element method. Calculations are made to help clarify how the underlying magnetic structure is related to the measured exchange bias fields as a function of temperature for the case of amorphous Co_65.5Fe_14.5B₂₀/granular Ir₂₂Mn₇₈ bilayers. Our calculations are in excellent agreement with experimentally measured macro-magnetic properties of these bilayers.

Original language	English
Article number	042410
Journal	Applied Physics Letters
Volume	103
Issue number	4
DOIs	https://doi.org/10.1063/1.4816664
State	Published - 22 Jul 2013
Externally published	Yes

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10.1063/1.4816664

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title = "Influence of thermal energy on exchange-bias studied by finite-element simulations",

abstract = "In this article we describe the thermal relaxation in anti-ferromagnetic/ ferromagnetic bilayers using a hybrid method that combines a kinetic Monte Carlo technique with magnetization dynamics following the Landau Lifshitz Gilbert equation. A granular anti-ferromagnetic layer is exchange coupled to an amorphous ferromagnetic layer and discretized using a finite element method. Calculations are made to help clarify how the underlying magnetic structure is related to the measured exchange bias fields as a function of temperature for the case of amorphous Co65.5Fe14.5B20/granular Ir22Mn78 bilayers. Our calculations are in excellent agreement with experimentally measured macro-magnetic properties of these bilayers.",

author = "J. Dean and A. Kohn and A. Kov{\'a}cs and Allwood, {D. A.} and D. Suess and T. Schrefl",

note = "Funding Information: The authors thank Michael Wells for magnetometry measurements. This work was funded by the UK Engineering and Physical Sciences Research Council (EP/F016174/1).",

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doi = "10.1063/1.4816664",

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T1 - Influence of thermal energy on exchange-bias studied by finite-element simulations

AU - Dean, J.

AU - Kohn, A.

AU - Kovács, A.

AU - Allwood, D. A.

AU - Suess, D.

AU - Schrefl, T.

N1 - Funding Information: The authors thank Michael Wells for magnetometry measurements. This work was funded by the UK Engineering and Physical Sciences Research Council (EP/F016174/1).

PY - 2013/7/22

Y1 - 2013/7/22

N2 - In this article we describe the thermal relaxation in anti-ferromagnetic/ ferromagnetic bilayers using a hybrid method that combines a kinetic Monte Carlo technique with magnetization dynamics following the Landau Lifshitz Gilbert equation. A granular anti-ferromagnetic layer is exchange coupled to an amorphous ferromagnetic layer and discretized using a finite element method. Calculations are made to help clarify how the underlying magnetic structure is related to the measured exchange bias fields as a function of temperature for the case of amorphous Co65.5Fe14.5B20/granular Ir22Mn78 bilayers. Our calculations are in excellent agreement with experimentally measured macro-magnetic properties of these bilayers.

AB - In this article we describe the thermal relaxation in anti-ferromagnetic/ ferromagnetic bilayers using a hybrid method that combines a kinetic Monte Carlo technique with magnetization dynamics following the Landau Lifshitz Gilbert equation. A granular anti-ferromagnetic layer is exchange coupled to an amorphous ferromagnetic layer and discretized using a finite element method. Calculations are made to help clarify how the underlying magnetic structure is related to the measured exchange bias fields as a function of temperature for the case of amorphous Co65.5Fe14.5B20/granular Ir22Mn78 bilayers. Our calculations are in excellent agreement with experimentally measured macro-magnetic properties of these bilayers.

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Influence of thermal energy on exchange-bias studied by finite-element simulations

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