Vortex Dynamic Phases in Type II Superconducting Strips with Regular and Flattened Triangular Pinning Arrays

Journal Article · Wed May 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4821-6· OSTI ID:22921290

Verga, L. G. ^[1]; Carlone, M. ^[2]; Venegas, P. A. ^[3]

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1. University of Southampton, Department of Chemistry (United Kingdom)
2. Universidade Estadual Paulista (UNESP), Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Faculdade de Ciências (Brazil)
3. Universidade Estadual Paulista (UNESP), Departamento de Física, Faculdade de Ciências (Brazil)

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.

• OSTI ID: 22921290
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 5 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPUTERIZED SIMULATION
DENSITY
INTERSTITIALS
MAGNETIC FIELDS
SUPERCONDUCTIVITY
TYPE-II SUPERCONDUCTORS