Micromagnetic modelling of the dynamics of exchange springs in multi-layer systems
Micromagnetic modelling of the dynamics of exchange springs in multi-layer systems
Exchange springs are formed in multilayers of alternating hard and soft ferromagnetic materials which are exchange coupled at their interfaces. These systems are rich of interesting physical properties, which can be tuned by selecting suitable geometries and compositions. In this paper, we present a computational study of the dynamics of a tri-layer DyFe2/YFe2/DyFe2 exchange spring system near the bending field (the field required to twist the magnetization of the soft YFe2 layer out of the aligned state). The dynamical reaction of the system to small variations of the applied field is studied and its oscillatory nature is analyzed numerically. The behaviors of the decay times, the frequencies, and amplitudes reveal enhanced responses of the system near the bending field.
2887-2889
Franchin, M.
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Zimmermann, J.P.
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Fischbacher, T.
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Bordignon, G.
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de Groot, P.A.J.
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Fangohr, H.
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6 June 2007
Franchin, M.
d71ee912-9dcc-421b-a55d-9818454cafff
Zimmermann, J.P.
b4047fb7-cba4-4777-9847-18061e78706e
Fischbacher, T.
c1c2b932-e6a2-47a8-8030-757108266d03
Bordignon, G.
a3f8fb2d-ef28-481a-a0fe-b427aff314a9
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Franchin, M., Zimmermann, J.P., Fischbacher, T., Bordignon, G., de Groot, P.A.J. and Fangohr, H.
(2007)
Micromagnetic modelling of the dynamics of exchange springs in multi-layer systems.
IEEE Transactions on Magnetics, 43 (6), .
(doi:10.1109/tmag.2007.892596).
Abstract
Exchange springs are formed in multilayers of alternating hard and soft ferromagnetic materials which are exchange coupled at their interfaces. These systems are rich of interesting physical properties, which can be tuned by selecting suitable geometries and compositions. In this paper, we present a computational study of the dynamics of a tri-layer DyFe2/YFe2/DyFe2 exchange spring system near the bending field (the field required to twist the magnetization of the soft YFe2 layer out of the aligned state). The dynamical reaction of the system to small variations of the applied field is studied and its oscillatory nature is analyzed numerically. The behaviors of the decay times, the frequencies, and amplitudes reveal enhanced responses of the system near the bending field.
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Published date: 6 June 2007
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Local EPrints ID: 57256
URI: http://eprints.soton.ac.uk/id/eprint/57256
ISSN: 0018-9464
PURE UUID: 31dbaf38-5118-4e9d-9d3a-a7cc067f0aa1
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Date deposited: 07 Aug 2008
Last modified: 16 Mar 2024 03:09
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Author:
M. Franchin
Author:
J.P. Zimmermann
Author:
T. Fischbacher
Author:
G. Bordignon
Author:
P.A.J. de Groot
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