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Vortex dynamic phases in type II superconducting strips with regular and flattened triangular pinning arrays

Vortex dynamic phases in type II superconducting strips with regular and flattened triangular pinning arrays
Vortex dynamic phases in type II superconducting strips with regular and flattened triangular pinning arrays

The dynamic behavior of vortices in type II superconducting infinite strips is simulated with two types of triangular pinning lattices: the regular one and a flattened triangular array that mimics the vortex lattice in a superconducting strip in the absence of a pinning array. The calculations were made at zero temperature and perpendicular magnetic field. The size effects are investigated for several strip widths maintaining the density and size of pinning centers unchanged. A driving force is applied in the infinite direction to analyze the depinning process and the different dynamic regimes. For the regular triangular pinning lattice, we found that there is a great richness of vortex dynamical phases because depending on strip width, part of the vortices may stabilize in different interstitial positions and the depinning process depends on the commensurability of each vortex chain. For the flattened triangular lattice, the system exhibits one ordered moving phase for narrower strips and two moving phases for the larger strip. As the transport force increases, vortices in the larger strip go from a disordered to an ordered phase. Moreover, the flattened lattice shows a much higher critical depinning force than the regular one due to commensurability effects.

Dynamic phases, Superconductivity, Surface effects, Vortex dynamics, Vortex pinning
1557-1939
1-12
Verga, L. G.
681e0d2b-083d-4478-85f6-d2eca7673c24
Vizarim, N. P.
916536c2-e7b0-49a8-b622-c7e21febafea
Carlone, M.
4e442c08-d541-4f97-a28f-0204298761dd
Venegas, P. A.
87d0c549-737b-4f17-83fb-e40939c57e26
Verga, L. G.
681e0d2b-083d-4478-85f6-d2eca7673c24
Vizarim, N. P.
916536c2-e7b0-49a8-b622-c7e21febafea
Carlone, M.
4e442c08-d541-4f97-a28f-0204298761dd
Venegas, P. A.
87d0c549-737b-4f17-83fb-e40939c57e26

Verga, L. G., Vizarim, N. P., Carlone, M. and Venegas, P. A. (2018) Vortex dynamic phases in type II superconducting strips with regular and flattened triangular pinning arrays. Journal of Superconductivity and Novel Magnetism, 1-12. (doi:10.1007/s10948-018-4821-6).

Record type: Article

Abstract

The dynamic behavior of vortices in type II superconducting infinite strips is simulated with two types of triangular pinning lattices: the regular one and a flattened triangular array that mimics the vortex lattice in a superconducting strip in the absence of a pinning array. The calculations were made at zero temperature and perpendicular magnetic field. The size effects are investigated for several strip widths maintaining the density and size of pinning centers unchanged. A driving force is applied in the infinite direction to analyze the depinning process and the different dynamic regimes. For the regular triangular pinning lattice, we found that there is a great richness of vortex dynamical phases because depending on strip width, part of the vortices may stabilize in different interstitial positions and the depinning process depends on the commensurability of each vortex chain. For the flattened triangular lattice, the system exhibits one ordered moving phase for narrower strips and two moving phases for the larger strip. As the transport force increases, vortices in the larger strip go from a disordered to an ordered phase. Moreover, the flattened lattice shows a much higher critical depinning force than the regular one due to commensurability effects.

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More information

Accepted/In Press date: 25 July 2018
e-pub ahead of print date: 7 August 2018
Keywords: Dynamic phases, Superconductivity, Surface effects, Vortex dynamics, Vortex pinning

Identifiers

Local EPrints ID: 426049
URI: http://eprints.soton.ac.uk/id/eprint/426049
ISSN: 1557-1939
PURE UUID: 12574e45-4e6f-439e-a090-f2e9a73e2e1c
ORCID for L. G. Verga: ORCID iD orcid.org/0000-0002-7453-238X

Catalogue record

Date deposited: 09 Nov 2018 17:30
Last modified: 07 Oct 2020 00:28

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