2026-06-27T16:03:27Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/44612023-08-25T15:56:04Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Rollano, V. author Gómez, A. author Muñoz Noval, Álvaro author Ory, M. C. de author Menghini, M. author González Herrera, Elvira María author Vicent López, José Luis 2023-06-16T14:16:19Z 2023-06-16T14:16:19Z 2021-08-16 2045-2322 10.1038/s41598-021-96192-z https://hdl.handle.net/20.500.14352/4461 http://dx.doi.org/10.1038/s41598-021-96192-z https://www.nature.com/ Ratchet devices allow turning an ac input signal into a dc output signal. A ratchet device is set by moving particles driven by zero averages forces on asymmetric potentials. Hybrid nanostructures combining artificially fabricated spin ice nanomagnet arrays with superconducting films have been identified as a good choice to develop ratchet nanodevices. In the current device, the asymmetric potentials are provided by charged Neel walls located in the vertices of spin ice magnetic honeycomb array, whereas the role of moving particles is played by superconducting vortices. We have experimentally obtained ratchet effect for different spin ice I configurations and for vortex lattice moving parallel or perpendicular to magnetic easy axes. Remarkably, the ratchet magnitudes are similar in all the experimental runs; i. e. different spin ice I configurations and in both relevant directions of the vortex lattice motion. We have simulated the interplay between vortex motion directions and a single asymmetric potential. It turns out vortices interact with uneven asymmetric potentials, since they move with trajectories crossing charged Neel walls with different orientations. Moreover, we have found out the asymmetric pair potentials which generate the local ratchet effect. In this rocking ratchet the particles (vortices) on the move are interacting each other (vortex lattice); therefore, the ratchet local effect turns into a global macroscopic effect. In summary, this ratchet device benefits from interacting particles moving in robust and topological protected type I spin ice landscapes. eng Atribución 3.0 España Realization of macroscopic ratchet effect based on nonperiodic and uneven potentials journal article URL https://docta.ucm.es/bitstreams/99012801-b7fe-47a7-bdc9-2e0018ff5155/download File MD5 59704a21d4c3c86f9000448bff24ea4e 2549141 application/pdf MuñozNovalA 04+CC.pdf URL https://docta.ucm.es/bitstreams/4706a3f4-e066-4370-b93b-9ec92a392f02/download File MD5 ab8de9bdfada7c5237ab8653fda110cc 32983 text/plain MuñozNovalA 04+CC.pdf.txt