RT Journal Article
T1 Magnetic order and disorder in nanomagnets probed by superconducting vortices
A1 Valle, J. del
A1 Vicent López, José Luis
AB 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.
PB Nature Publishing Group
SN 2045-2322
YR 2018
FD 2018-08-17
LK https://hdl.handle.net/20.500.14352/12265
UL https://hdl.handle.net/20.500.14352/12265
LA eng
NO © Te Author(s) 2018.We thank Spanish MINECO grants FIS2013-45469, FIS2016-76058 (AEI/FEDER, UE), Spanish CM grant S2013/ MIT-2850. IMDEA Nanociencia acknowledges support from the ‘Severo Ochoa’ Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). DG acknowledges RYC-2012-09864, S2013/MIT-3007 and ESP2015-65597-C4-3-R for financial supportArticulo firmado por más de diez autores.
NO Ministerio de Economía y Competitividad (MINECO)/AEI/FEDER
NO Comunidad de Madrid
NO Centros de Excelencia Severo Ochoa (MINECO)
NO Programa Ramón y Cajal
DS Docta Complutense
RD 6 abr 2025