Self-assembly routes towards creating superconducting and magnetic arrays
Self-assembly routes towards creating superconducting and magnetic arrays
Using self-assembly from colloidal suspensions of polystyrene latex spheres we prepared well-ordered templates. By electrochemical deposition of magnetic and superconducting metals in the pores of such templates highly ordered magnetic and superconducting anti-dot nano-structures with 3D architectures were created. Further developments of this template preparation method allow us to obtain dot arrays and even more complicated structures. In magnetic anti-dot arrays we observe a large increase in coercive field produced by nanoscale (50–1000nm) holes. We also find the coercive field to demonstrate an oscillatory dependence on film thickness. In magnetic dot arrays we have explored the genesis of 3D magnetic vortices and determined the critical dot size. Superconducting Pb anti-dot arrays show pronounced Little-Parks oscillations in Tc and matching effects in magnetization and magnetic susceptibility. The spherical shape of the holes results in significantly reduced pinning strength as compared to standard lithographic samples. Our results demonstrate that self-assembly template methods are emerging as a viable, low cost route to prepare sub-micron structures.
template methods, particles, coercivity, nanodots
339-349
Zhukov, A.A.
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Filby, E.T.
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Goncharov, A.V.
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Ghanem, M.A.
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Bartlett, P.N.
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Boardman, R.
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Fangohr, H.
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Metlushko, V.V.
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Novosad, V.
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Karapetrov, G.
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de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
2005
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
Filby, E.T.
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Goncharov, A.V.
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Ghanem, M.A.
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Bartlett, P.N.
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Boardman, R.
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Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Metlushko, V.V.
ab23ba1e-f493-4e59-a671-e9dbcf4d8b74
Novosad, V.
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Karapetrov, G.
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de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Zhukov, A.A., Filby, E.T., Goncharov, A.V., Ghanem, M.A., Bartlett, P.N., Boardman, R., Fangohr, H., Metlushko, V.V., Novosad, V., Karapetrov, G. and de Groot, P.A.J.
(2005)
Self-assembly routes towards creating superconducting and magnetic arrays.
Journal of Low Temperature Physics, 139 (1), .
(doi:10.1007/s10909-005-3936-x).
Abstract
Using self-assembly from colloidal suspensions of polystyrene latex spheres we prepared well-ordered templates. By electrochemical deposition of magnetic and superconducting metals in the pores of such templates highly ordered magnetic and superconducting anti-dot nano-structures with 3D architectures were created. Further developments of this template preparation method allow us to obtain dot arrays and even more complicated structures. In magnetic anti-dot arrays we observe a large increase in coercive field produced by nanoscale (50–1000nm) holes. We also find the coercive field to demonstrate an oscillatory dependence on film thickness. In magnetic dot arrays we have explored the genesis of 3D magnetic vortices and determined the critical dot size. Superconducting Pb anti-dot arrays show pronounced Little-Parks oscillations in Tc and matching effects in magnetization and magnetic susceptibility. The spherical shape of the holes results in significantly reduced pinning strength as compared to standard lithographic samples. Our results demonstrate that self-assembly template methods are emerging as a viable, low cost route to prepare sub-micron structures.
Text
Zhuk_05b.pdf
- Accepted Manuscript
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Published date: 2005
Keywords:
template methods, particles, coercivity, nanodots
Identifiers
Local EPrints ID: 23250
URI: http://eprints.soton.ac.uk/id/eprint/23250
PURE UUID: b83058c4-a81e-4ec1-b706-917fcedcfb84
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Date deposited: 14 Mar 2006
Last modified: 16 Mar 2024 03:36
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Contributors
Author:
A.A. Zhukov
Author:
E.T. Filby
Author:
A.V. Goncharov
Author:
M.A. Ghanem
Author:
V.V. Metlushko
Author:
V. Novosad
Author:
G. Karapetrov
Author:
P.A.J. de Groot
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