Ferromagnetic/superconducting interface in a hybrid nanoscopic disc

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

González, J.D.^1,2 ; Aguilar, J.L.^1 ; Barba-Ortega, J.^2

Departamento de Física, Universidad Del Magdalena, Santa Marta, Colombia^1

Departamento de Física, Universidad Nacional de Colombia, Bogota, Colombia^2

关键词: Applied magnetic fields;    Density of state;    Exchange fields;    Ferromagnetic structures;    Superconducting disks;    Superconducting order parameters;    Vortex configurations;    Vortex penetration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012141/pdf
DOI  :  10.1088/1742-6596/574/1/012141

来源: IOP

【 摘 要 】

The oscillations exhibited by the magnetization of superconducting nano and mesoscopics structures as a function of the applied magnetic field has attracted attention in the last few years. Nano/Mesoscopic hybrid systems in contact with ferromagnets exhibit interesting transport properties related to the influence of the exchange field on the density of states of clean ferromagnetic structures in contact with superconductor. In this work we study the vortex configurations in a superconducting disk with one central defect inside. The sample is surrounded by a ferromagnetic medium. We calculate the spatial distribution of the Cooper pairs and the phase of the superconducting order parameter and curves of magnetization and vorticity as a function of the magnetic applied field. We found that the first vortex penetration field decrease when a ferromagnetic/superconducting interface is used.