Multiscale micromagnetism of Co-Pd multilayers
Multiscale micromagnetism of Co-Pd multilayers
The interplay between atomic and micromagnetic effects in Co-Pd multilayers is investigated by model calculations and numerical simulations. By minimizing the total exchange energy, an effective exchange stiffness is obtained. The stiffness depends on the superlattice periodicity, on the wave vector of the magnetization variation, and on the exchange coupling through the Pd, which is calculated from first principles (J?=?7.66 mJ/m2). The net magnetic anisotropy, Keff?=?0.71 MJ/m3, which is also obtained from first principles, contains two parts, namely the Pd-Co interface anisotropy Kif?=?0.45 mJ/m2 and the bulk anisotropy KCo?=??0.28 MJ/m3 of the strained fcc Co. For vertical and lateral magnetization variations, we find domain-wall thicknesses of 5.1 nm and 6.9 nm and domain-wall energies of 5.94 mJ/m2 and 6.66 mJ/m2, respectively.
ab initio calculations, cobalt, magnetic anisotropy, magnetic domain walls, magnetic multilayers, micromagnetics, palladium
07C724-[3pp]
Manchanda, P.
63e6cb60-54d4-4793-8307-a1a74bef4f47
Skomski, R.
974f2e13-dc85-4944-b2c4-1785c53d071e
Sahota, P.K.
2fc75670-c824-43ef-9bfc-3b860715772e
Franchin, M.
2a19778e-3ee9-4770-ba7e-6ccc91f49ab0
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Kashyap, A.
f6b7dd61-4938-454c-b0f4-3e4f063c613e
12 March 2012
Manchanda, P.
63e6cb60-54d4-4793-8307-a1a74bef4f47
Skomski, R.
974f2e13-dc85-4944-b2c4-1785c53d071e
Sahota, P.K.
2fc75670-c824-43ef-9bfc-3b860715772e
Franchin, M.
2a19778e-3ee9-4770-ba7e-6ccc91f49ab0
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Kashyap, A.
f6b7dd61-4938-454c-b0f4-3e4f063c613e
Manchanda, P., Skomski, R., Sahota, P.K., Franchin, M., Fangohr, H. and Kashyap, A.
(2012)
Multiscale micromagnetism of Co-Pd multilayers.
Journal of Applied Physics, 111 (7), .
(doi:10.1063/1.3679437).
Abstract
The interplay between atomic and micromagnetic effects in Co-Pd multilayers is investigated by model calculations and numerical simulations. By minimizing the total exchange energy, an effective exchange stiffness is obtained. The stiffness depends on the superlattice periodicity, on the wave vector of the magnetization variation, and on the exchange coupling through the Pd, which is calculated from first principles (J?=?7.66 mJ/m2). The net magnetic anisotropy, Keff?=?0.71 MJ/m3, which is also obtained from first principles, contains two parts, namely the Pd-Co interface anisotropy Kif?=?0.45 mJ/m2 and the bulk anisotropy KCo?=??0.28 MJ/m3 of the strained fcc Co. For vertical and lateral magnetization variations, we find domain-wall thicknesses of 5.1 nm and 6.9 nm and domain-wall energies of 5.94 mJ/m2 and 6.66 mJ/m2, respectively.
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Submitted date: 23 September 2011
Published date: 12 March 2012
Keywords:
ab initio calculations, cobalt, magnetic anisotropy, magnetic domain walls, magnetic multilayers, micromagnetics, palladium
Organisations:
Computational Engineering & Design Group
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Local EPrints ID: 335832
URI: http://eprints.soton.ac.uk/id/eprint/335832
ISSN: 0021-8979
PURE UUID: 51692733-d30d-43ce-90f6-13a1d25b7324
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Date deposited: 13 Mar 2012 14:14
Last modified: 15 Mar 2024 03:03
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Author:
P. Manchanda
Author:
R. Skomski
Author:
P.K. Sahota
Author:
M. Franchin
Author:
A. Kashyap
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