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Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials

Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials
Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials
We develop a generally applicable method for the accurate measurement of intrinsic switching field distributions and the determination of exchange and dipolar interactions in granular magnetic materials. The method is based on the simultaneous analysis of hysteresis loop and recoil curve data. Its validity and practical implementation are demonstrated by means of computational modeling using a reference function identification scheme. We find the methodology to be numerically accurate in a wide parameter range, far exceeding the previously utilized mean-field interaction regime used in other methodologies.
0003-6951
[3pp.]
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee
Liu, Y.
621975c3-5440-4f2c-b313-4e724228220d
Dahmen, K.A.
05a0c9c6-7ec1-4493-8990-4db82ad401a6
Berger, A.
4c40c340-bd0b-4ec6-af1e-fd8326110cca
Hovorka, O.
a12bd550-ad45-4963-aa26-dd81dd1609ee
Liu, Y.
621975c3-5440-4f2c-b313-4e724228220d
Dahmen, K.A.
05a0c9c6-7ec1-4493-8990-4db82ad401a6
Berger, A.
4c40c340-bd0b-4ec6-af1e-fd8326110cca

Hovorka, O., Liu, Y., Dahmen, K.A. and Berger, A. (2009) Simultaneous determination of intergranular interactions and intrinsic switching field distributions in magnetic materials. Applied Physics Letters, 95 (19), [3pp.]. (doi:10.1063/1.3263732).

Record type: Article

Abstract

We develop a generally applicable method for the accurate measurement of intrinsic switching field distributions and the determination of exchange and dipolar interactions in granular magnetic materials. The method is based on the simultaneous analysis of hysteresis loop and recoil curve data. Its validity and practical implementation are demonstrated by means of computational modeling using a reference function identification scheme. We find the methodology to be numerically accurate in a wide parameter range, far exceeding the previously utilized mean-field interaction regime used in other methodologies.

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Published date: 12 November 2009
Organisations: Computational Engineering & Design Group

Identifiers

Local EPrints ID: 351908
URI: http://eprints.soton.ac.uk/id/eprint/351908
ISSN: 0003-6951
PURE UUID: b978dd40-e2c0-4ebb-9cc6-ee19cafca12c
ORCID for O. Hovorka: ORCID iD orcid.org/0000-0002-6707-4325

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Date deposited: 30 Apr 2013 13:35
Last modified: 15 Mar 2024 03:47

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Contributors

Author: O. Hovorka ORCID iD
Author: Y. Liu
Author: K.A. Dahmen
Author: A. Berger

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