Tuning magnonic devices with on-chip permanent micromagnets
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arXiv
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2024
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| author | Cocconcelli, Maria Tacchi, Silvia Erdélyi, Róbert Maspero, Federico Del Giacco, Andrea Plaza, Alejandro Koplak, Oksana Cattoni, Andrea Silvani, Raffaele Madami, Marco Papp, Ádam Csaba, Gyorgy Kohl, Felix Heinz, Björn Pirro, Philipp Bertacco, Riccardo |
| author_facet | Cocconcelli, Maria Tacchi, Silvia Erdélyi, Róbert Maspero, Federico Del Giacco, Andrea Plaza, Alejandro Koplak, Oksana Cattoni, Andrea Silvani, Raffaele Madami, Marco Papp, Ádam Csaba, Gyorgy Kohl, Felix Heinz, Björn Pirro, Philipp Bertacco, Riccardo |
| contents | One of the most appealing features of magnonics is the easy tunability of spin-waves propagation via external magnetic fields. Usually this requires bulky and power-hungry electromagnets which are not compatible with device miniaturization. Here we propose a different approach, exploiting the stray field from permanent micromagnets integrated on the same chip of a magnonic wave-guide. In our monolithic device, we employ two SmCo square micromagnets (10x10 $μ$m$^2$) flanking a CoFeB conduit at different distances from its axis, to produce a tunable transverse bias field between 7.5 and 3.0 mT in the conduit region between the magnets. Spin waves excited by an antenna just outside the region between the magnets enter a region with a variable higher (lower) effective field when an external bias field is applied parallel (antiparallel) to that from the micromagnets. Consequently, the attenuation length and phase shift of Damon-Eshbach spin waves can be tuned in a wide range by playing with the parallel-antiparallel configuration of the external bias and the distance between SmCo micromagnets and the CoFeB conduit. This work demonstrates the potential of permanent micro-magnets for the realization of low-power, integrated magnonic devices with tunable functionalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_03206 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tuning magnonic devices with on-chip permanent micromagnets Cocconcelli, Maria Tacchi, Silvia Erdélyi, Róbert Maspero, Federico Del Giacco, Andrea Plaza, Alejandro Koplak, Oksana Cattoni, Andrea Silvani, Raffaele Madami, Marco Papp, Ádam Csaba, Gyorgy Kohl, Felix Heinz, Björn Pirro, Philipp Bertacco, Riccardo Applied Physics One of the most appealing features of magnonics is the easy tunability of spin-waves propagation via external magnetic fields. Usually this requires bulky and power-hungry electromagnets which are not compatible with device miniaturization. Here we propose a different approach, exploiting the stray field from permanent micromagnets integrated on the same chip of a magnonic wave-guide. In our monolithic device, we employ two SmCo square micromagnets (10x10 $μ$m$^2$) flanking a CoFeB conduit at different distances from its axis, to produce a tunable transverse bias field between 7.5 and 3.0 mT in the conduit region between the magnets. Spin waves excited by an antenna just outside the region between the magnets enter a region with a variable higher (lower) effective field when an external bias field is applied parallel (antiparallel) to that from the micromagnets. Consequently, the attenuation length and phase shift of Damon-Eshbach spin waves can be tuned in a wide range by playing with the parallel-antiparallel configuration of the external bias and the distance between SmCo micromagnets and the CoFeB conduit. This work demonstrates the potential of permanent micro-magnets for the realization of low-power, integrated magnonic devices with tunable functionalities. |
| title | Tuning magnonic devices with on-chip permanent micromagnets |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2406.03206 |