Magnetic order and disorder in nanomagnets probed by superconducting vortices
| Autor: | V. Rollano, L. M. Alvarez-Prado, Elvira M. Gonzalez, M. R. Osorio, José Ignacio Martín, María Vélez, Alicia Gomez, J. del Valle, J. L. Vicent, Carlos Quirós, Daniel Granados |
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| Rok vydání: | 2018 |
| Předmět: |
Magnetic domain
media_common.quotation_subject lcsh:Medicine FOS: Physical sciences 02 engineering and technology 01 natural sciences Asymmetry Article Superconductivity (cond-mat.supr-con) Lattice (order) Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics lcsh:Science media_common Superconductivity Physics Multidisciplinary Condensed matter physics Física de materiales Condensed Matter - Superconductivity Demagnetizing field lcsh:R 021001 nanoscience & nanotechnology Nanomagnet Magnetic field Vortex Física del estado sólido lcsh:Q 0210 nano-technology |
| Zdroj: | E-Prints Complutense. Archivo Institucional de la UCM instname Repositorio Institucional del Instituto Madrileño de Estudios Avanzados en Nanociencia Scopus RUO. Repositorio Institucional de la Universidad de Oviedo Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018) E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid Scientific Reports |
| DOI: | 10.48550/arxiv.1802.09633 |
| Popis: | We have studied two nanomagnet systems with strong (Co/Pd multilayers) and weak (NdCo alloy films) stray magnetic fields by probing the out-of-plane magnetic states with superconducting vortices. The hybrid samples are made of array of nanomagnets embedded in superconducting Nb thin films. The vortex motion detects relevant magnetic state features, since superconducting vortices are able to discriminate between different magnetic stray field strengths and directions. The usual matching effect between the superconducting vortex lattice and the periodic pinning array can be quenched by means of disorder magnetic potentials with strong stray fields at random. Ordered stray fields retrieve the matching effect and yield asymmetry and shift in the vortex dissipation signal. Furthermore vortices can discriminate the sizes of the nanomagnet magnetic domains, detecting magnetic domain sizes as small as 70 nm. In addition, we observe that the vortex cores play the crucial role instead of the supercurrents around the vortex. Comment: 22 pages, 8 figures |
| Databáze: | OpenAIRE |
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