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

Autor(es)

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

Afiliação do(s) autor(es)

^[1] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants - England

^[2] Univ Estadual Paulista UNESP, Fac Ciencias, Programa Posgrad Ciencia & Tecnol Mat POSMAT, CP 473, BR-17033360 Bauru, SP - Brazil

^[3] Univ Estadual Paulista UNESP, Fac Ciencias, Dept Fis, CP 473, BR-17033360 Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Superconductivity and Novel Magnetism; v. 32, n. 5, p. 1179-1190, MAY 2019.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 12/22141-2 - Estudo dos Efeitos de Tamanho nas Correntes Críticas e Comportamento Dinâmico dos Vórtices em Fitas Supercondutoras do Tipo II com Desordem Periódica à Temperatura Finita.
• Beneficiário: Lucas Garcia Verga
• Linha de fomento: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/20976-3 - Comportamento dinâmico de skyrmions sob influência de arranjos periódicos de centros de aprisionamento em filmes finos infinitos de materiais magnéticos quirais
• Beneficiário: Nicolas Porto Vizarim
• Linha de fomento: Bolsas no Brasil - Doutorado