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First order reversal curves and intrinsic parameter determination for magnetic materials: limitations of hysteron-based approaches in correlated systems

First order reversal curves and intrinsic parameter determination for magnetic materials: limitations of hysteron-based approaches in correlated systems
First order reversal curves and intrinsic parameter determination for magnetic materials: limitations of hysteron-based approaches in correlated systems
The generic problem of extracting information on intrinsic particle properties from the whole class of interacting magnetic fine particle systems is a long standing and difficult inverse problem. As an example, the Switching Field Distribution (SFD) is an important quantity in the characterization of magnetic systems, and its determination in many technological applications, such as recording media, is especially challenging. Techniques such as the first order reversal curve (FORC) methods, were developed to extract the SFD from macroscopic measurements. However, all methods rely on separating the contributions to the measurements of the intrinsic SFD and the extrinsic effects of magnetostatic and exchange interactions. We investigate the underlying physics of the FORC method by applying it to the output predictions of a kinetic Monte-Carlo model with known input parameters. We show that the FORC method is valid only in cases of weak spatial correlation of the magnetisation and suggest a more general approach.
2045-2322
Ruta, Sergio
4006a03b-5ee2-41bc-b85f-6e97b9498a57
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee
Huang, Pin Wei
3897cc26-594b-4460-b05f-3e17a67dd9d4
Wang, Kangkang
998084c8-d83a-4eb7-ac44-4d6728506278
Ju, Ganping
b7c2f3f8-59ce-440a-8586-1feb3f82b283
Chantrell, Roy
e302f8d2-4450-4d1e-a944-50f40e93e7db
Ruta, Sergio
4006a03b-5ee2-41bc-b85f-6e97b9498a57
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee
Huang, Pin Wei
3897cc26-594b-4460-b05f-3e17a67dd9d4
Wang, Kangkang
998084c8-d83a-4eb7-ac44-4d6728506278
Ju, Ganping
b7c2f3f8-59ce-440a-8586-1feb3f82b283
Chantrell, Roy
e302f8d2-4450-4d1e-a944-50f40e93e7db

Ruta, Sergio, Hovorka, Ondrej, Huang, Pin Wei, Wang, Kangkang, Ju, Ganping and Chantrell, Roy (2017) First order reversal curves and intrinsic parameter determination for magnetic materials: limitations of hysteron-based approaches in correlated systems. Scientific Reports, 7, [45218]. (doi:10.1038/srep45218).

Record type: Article

Abstract

The generic problem of extracting information on intrinsic particle properties from the whole class of interacting magnetic fine particle systems is a long standing and difficult inverse problem. As an example, the Switching Field Distribution (SFD) is an important quantity in the characterization of magnetic systems, and its determination in many technological applications, such as recording media, is especially challenging. Techniques such as the first order reversal curve (FORC) methods, were developed to extract the SFD from macroscopic measurements. However, all methods rely on separating the contributions to the measurements of the intrinsic SFD and the extrinsic effects of magnetostatic and exchange interactions. We investigate the underlying physics of the FORC method by applying it to the output predictions of a kinetic Monte-Carlo model with known input parameters. We show that the FORC method is valid only in cases of weak spatial correlation of the magnetisation and suggest a more general approach.

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More information

Accepted/In Press date: 20 February 2017
e-pub ahead of print date: 24 March 2017

Identifiers

Local EPrints ID: 415980
URI: http://eprints.soton.ac.uk/id/eprint/415980
ISSN: 2045-2322
PURE UUID: 9e66e88d-50ae-40d2-a2b7-0afef4dc7409
ORCID for Ondrej Hovorka: ORCID iD orcid.org/0000-0002-6707-4325

Catalogue record

Date deposited: 29 Nov 2017 17:30
Last modified: 22 Nov 2021 03:05

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Contributors

Author: Sergio Ruta
Author: Ondrej Hovorka ORCID iD
Author: Pin Wei Huang
Author: Kangkang Wang
Author: Ganping Ju
Author: Roy Chantrell

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