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Analysis of magnetoresistance in arrays of connected nano-rings

Analysis of magnetoresistance in arrays of connected nano-rings
Analysis of magnetoresistance in arrays of connected nano-rings
We study the anisotropic magnetoresistance (AME) of a 2D periodic square array of connected permalloy rings with periodicity of 1m combining experimental and computational techniques. The computational models consists of two parts: 1) the computation of the magnetization and 2) the computation of the current density. For 1), we use standard micromagnetic methods. For 2), we start from a potential difference applied across the sample, compute the resulting electric potential , and subsequently the corresponding current density based on a uniform conductiviy. We take into account the backreaction of the magnetoresistive effects onto the current density by self-consistently computing the current density and conductivity until they converge. We compare the experimentally measured AMR insight into the characteristics of the AMR data. Finally, we demonstrate the importance of taking into account the spatial variation of the current density when computing the AMR.
0018-9464
2881-2883
Bordignon, G.
a3f8fb2d-ef28-481a-a0fe-b427aff314a9
Fischbacher, T.
c1c2b932-e6a2-47a8-8030-757108266d03
Franchin, M.
d71ee912-9dcc-421b-a55d-9818454cafff
Zimmermann, J.P.
b4047fb7-cba4-4777-9847-18061e78706e
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
Metlushko, V.V.
ab23ba1e-f493-4e59-a671-e9dbcf4d8b74
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Bordignon, G.
a3f8fb2d-ef28-481a-a0fe-b427aff314a9
Fischbacher, T.
c1c2b932-e6a2-47a8-8030-757108266d03
Franchin, M.
d71ee912-9dcc-421b-a55d-9818454cafff
Zimmermann, J.P.
b4047fb7-cba4-4777-9847-18061e78706e
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
Metlushko, V.V.
ab23ba1e-f493-4e59-a671-e9dbcf4d8b74
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160

Bordignon, G., Fischbacher, T., Franchin, M., Zimmermann, J.P., Zhukov, A.A., Metlushko, V.V., de Groot, P.A.J. and Fangohr, H. (2007) Analysis of magnetoresistance in arrays of connected nano-rings. IEEE Transactions on Magnetics, 43 (6), 2881-2883. (doi:10.1109/TMAG.2007.892597).

Record type: Article

Abstract

We study the anisotropic magnetoresistance (AME) of a 2D periodic square array of connected permalloy rings with periodicity of 1m combining experimental and computational techniques. The computational models consists of two parts: 1) the computation of the magnetization and 2) the computation of the current density. For 1), we use standard micromagnetic methods. For 2), we start from a potential difference applied across the sample, compute the resulting electric potential , and subsequently the corresponding current density based on a uniform conductiviy. We take into account the backreaction of the magnetoresistive effects onto the current density by self-consistently computing the current density and conductivity until they converge. We compare the experimentally measured AMR insight into the characteristics of the AMR data. Finally, we demonstrate the importance of taking into account the spatial variation of the current density when computing the AMR.

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Published date: August 2007

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Local EPrints ID: 46710
URI: https://eprints.soton.ac.uk/id/eprint/46710
ISSN: 0018-9464
PURE UUID: 50a0b60d-ac9a-48b6-b79d-676c48e0be06

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Date deposited: 16 Jul 2007
Last modified: 13 Mar 2019 21:01

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