magnetic flux concentrators; magnetic sensors; metamaterials; metasurfaces; micromagnetism; Acoustics waves; Engineered structures; Enhanced sensitivity; Metasurface; Micromagnetisms; On chips; Optical-; Permalloys; Thermal wave; Materials Science (all); Engineering (all); Physics and Astronomy (all)
Abstract :
[en] Metamaterials with engineered structures have been extensively investigated for their capability to manipulate optical, acoustic, or thermal waves. In particular, magnetic metamaterials with precise geometry, shape, size and arrangement of their elemental blocks may be used to concentrate, focus, or guide magnetic fields. In this work, we show the potential of using soft-magnetic permalloy (Py) metasurfaces to tailor the physical properties of other magnetic structures at the local scale. As an illustration, the magnetic response of a Cobalt (Co) sensor bar placed at the core of a Py metasurface is investigated as a function of in-plane magnetic fields through the planar Hall effect. Our findings reveal that by appropriately selecting the metasurface geometrical parameters, we can adjust the Co bar's coercive field and susceptibility, leading to a huge enhancement in sensor sensitivity of over 2 orders of magnitude. Micromagnetic simulations, coupled with magneto-transport equations and X-ray photoemission electron measurements (XPEEM) with contrast from magnetic circular dichroism (XMCD), accurately capture this effect and provide insights into the underlying physical mechanisms. These findings can potentially enhance the performance and versatility of magnetic functional devices by using specifically designed structural magnetic materials.
Disciplines :
Physics
Author, co-author :
Barrera, Aleix ✱; Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, Bellaterra 08193, Spain
Fourneau, Emile ✱; Université de Liège - ULiège > Département GxABT
Bort-Soldevila, Natanael; Departament de Física, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
Cunill-Subiranas, Jaume ; Departament de Física, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
Del-Valle, Nuria; Departament de Física, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
Lejeune, Nicolas ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Staňo, Michal ; CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno 61200, Czech Republic
Smekhova, Alevtina; Helmholtz-Zentrum Berlin fur Materialien und Energie Albert-Einstein-Strasse 15, Berlin D-12489, Germany
Mestres, Narcis ; Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, Bellaterra 08193, Spain
Balcells, Lluis; Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, Bellaterra 08193, Spain
Navau, Carles ; Departament de Física, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
Uhlíř, Vojtěch ; CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno 61200, Czech Republic ; Institute of Physical Engineering, Brno University of Technology, Technická 2, Brno 616 69, Czech Republic
Bending, Simon J ; Centre for Nanoscience and Nanotechnology, Department of Physics, University of Bath, Bath BA2 7AY, U.K
Valencia, Sergio ; Helmholtz-Zentrum Berlin fur Materialien und Energie Albert-Einstein-Strasse 15, Berlin D-12489, Germany
Silhanek, Alejandro ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Palau, Anna ; Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus de la UAB, Bellaterra 08193, Spain
The authors acknowledge financial support from Fonds de la Recherche Scientifique - FNRS under the programs PDR T.0204.21 and CDR J.0176.22, EraNet-CHISTERA R.8003.21. Spanish Ministry of Science and Innovation MCIN/AEI/10.13039/501100011033/through CHIST-ERA PCI2021-122028-2A and PCI2021-122083-2A cofinanced by the European Union Next Generation EU/PRTR, PID2021-124680OB-I00, PID2021-128410OB-I00, and TED2021-130402B-I00, cofinanced by ERDF a way of making Europe, and Severo Ochoa Programme for Centres of Excellence in R&D (CEX2023-001263-S). The Spanish Nanolito networking project (RED2022-134096-T). The Research Foundation and by COST (European Cooperation in Science and Technology) [www.cost.eu] through COST Action SUPERQUMAP (CA 21144). N.L. acknowledges support from FRS-FNRS (Research Fellowships FRIA). The work of E.F. has been financially supported by the FWO and F.R.S.-FNRS under the Excellence of Science (EOS) project O.0028.22. AB acknowledge support from MICIN Predoctoral Fellowship (PRE2019-09781). S.J.B. was supported by the Engineering and Physical Sciences Research Council (EPSRC) in the United Kingdom under Grant No. EP/W022680/1. The authors acknowledge the Scientific Services at ICMAB and the UAB PhD program in Materials Science. M.S. and V.U. acknowledge the support from the TACR EraNet CHIST-ERA project MetaMagIC TH77010001. J.C.-S. acknowledges funding from AGAUR-FI Joan Oro\u0301 grants (2023 FI-2 00143), Generalitat de Catalunya. We thank the Helmholtz-Zentrum Berlin fu\u0308r Materialien und Energie for the allocation of synchrotron radiation beamtime at the SPEEM end-station of UE49-PGM beamline at BESSY II.The authors acknowledge financial support from Fonds de la Recherche Scientifique - FNRS under the programs PDR T.0204.21 and CDR J.0176.22, EraNet-CHISTERA R.8003.21. Spanish Ministry of Science and Innovation MCIN/AEI/10.13039/501100011033/through CHIST-ERA PCI2021-122028-2A and PCI2021-122083-2A cofinanced by the European Union Next Generation EU/PRTR, PID2021-124680OB-I00, PID2021\u2013128410OB-I00, and TED2021-130402B\u2013I00, cofinanced by ERDF a way of making Europe, and Severo Ochoa Programme for Centres of Excellence in R&D (CEX2023\u2013001263-S). The Spanish Nanolito networking project (RED2022-134096-T). The Research Foundation and by COST (European Cooperation in Science and Technology) [ www.cost.eu ] through COST Action SUPERQUMAP (CA 21144). N.L. acknowledges support from FRS-FNRS (Research Fellowships FRIA). The work of E.F. has been financially supported by the FWO and F.R.S.-FNRS under the Excellence of Science (EOS) project O.0028.22. AB acknowledge support from MICIN Predoctoral Fellowship (PRE2019-09781). S.J.B. was supported by the Engineering and Physical Sciences Research Council (EPSRC) in the United Kingdom under Grant No. EP/W022680/1. The authors acknowledge the Scientific Services at ICMAB and the UAB PhD program in Materials Science. M.S. and V.U. acknowledge the support from the TACR EraNet CHIST-ERA project MetaMagIC TH77010001. J.C.-S. acknowledges funding from AGAUR-FI Joan Oro\u0301 grants (2023 FI-2 00143), Generalitat de Catalunya. We thank the Helmholtz-Zentrum Berlin fu\u0308r Materialien und Energie for the allocation of synchrotron radiation beamtime at the SPEEM end-station of UE49-PGM beamline at BESSY II.
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