1. Little–Parks effect governed by magnetic nanostructures with out-of-plane magnetization
- Author
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Álvaro Muñoz-Noval, M. C. de Ory, Encina M González, J. L. Vicent, Ana M. Gómez, M. Menghini, V. Rollano, Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Centros de Excelencia Severo Ochoa, INSTITUTO MADRILEÑO DE ESTUDIOS AVANZADOS EN NANOCIENCIA, SEV-2016-0686, Muñoz Nova, A. [0000-0003-3236-5509], González, E. M. [0000-0001-9360-3596], Gómez, A. [0000-0002-8752-1401], Agencia Estatal de Investigación (AEI), Comunidad de Madrid, Spanish Government, European Cooperation in Science and Technology (COST), Spanish MICINN Grant, and Centro de Excelencia Científica Severo Ochoa IMDEA Nanociencia more...
- Subjects
Work (thermodynamics) ,Materials science ,Field (physics) ,lcsh:Medicine ,02 engineering and technology ,Little–Parks effect ,01 natural sciences ,Article ,Magnetization ,Condensed Matter::Superconductivity ,0103 physical sciences ,lcsh:Science ,010306 general physics ,Superconductivity ,Multidisciplinary ,Condensed matter physics ,Física de materiales ,Physics ,lcsh:R ,021001 nanoscience & nanotechnology ,Magnetic field ,Vortex ,Física del estado sólido ,lcsh:Q ,Nanodot ,0210 nano-technology - Abstract
Little–Parks effect names the oscillations in the superconducting critical temperature as a function of the magnetic field. This effect is related to the geometry of the sample. In this work, we show that this effect can be enhanced and manipulated by the inclusion of magnetic nanostructures with perpendicular magnetization. These magnetic nanodots generate stray fields with enough strength to produce superconducting vortex–antivortex pairs. So that, the L–P effect deviation from the usual geometrical constrictions is due to the interplay between local magnetic stray fields and superconducting vortices. Moreover, we compare our results with a low-stray field sample (i.e. with the dots in magnetic vortex state) showing how the enhancement of the L–P effect can be explained by an increment of the effective size of the nanodots., With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) more...
- Published
- 2020