Magnetosome chains in magnetotactic bacteria present ideal nanomagnonic model systems for studying collective resonance modes of dipolar-coupled single domain particles in relation to their spatial arrangement. Using microresonator-based ferromagnetic resonance (FMR) spectroscopy, electron microscopy, and micromagnetic modeling, we here provide insights into the complex magnonic activity within a single magnetosome chain. While the angular dependence of its FMR spectrum is dominated by twofold symmetry features due to the uniaxial anisotropy of linear chain segments, we also observed an unexpected behavior such as interrupted lines and flat bands due to the intricate geometrical details of this particular chain, such as a cross-like structural anomaly where a pair of particles is oriented perpendicular to the main axis of the chain and thus breaks the prevailing axial dipolar coupling symmetry. Such a cross junction formed by four particles exhibits interesting magnonic network properties. Notably, we observe reciprocity in the sense that the spectral response of one particle to an excitation of another one is identical to the response of the latter given an excitation of the former. Furthermore, we have identified that magnonic coupling between A and B can be facilitated via a dark state, as in magnonic stimulated Raman adiabatic passage, and that this dark-state coupling can be made non-reciprocal between A and B by breaking the symmetry of the spatial arrangement of the four particles.
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Reciprocity relations in a biologically inspired nanomagnonic system with dipolar coupling
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25 March 2024
Research Article|
March 27 2024
Reciprocity relations in a biologically inspired nanomagnonic system with dipolar coupling
Special Collection:
Magnonics
Benjamin W. Zingsem
;
Benjamin W. Zingsem
(Conceptualization, Data curation, Formal analysis, Investigation, Software, Visualization, Writing – original draft, Writing – review & editing)
1
Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich
, 52428 Jülich, Germany
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Thomas Feggeler
;
Thomas Feggeler
(Data curation, Writing – original draft)
2
Department of Physics, University of California
, Berkeley, Berkeley California 94720, USA
3
Advanced Light Source, Lawrence Berkeley National Laboratory
, Berkeley California 94720, USA
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Detlef Spoddig
;
Detlef Spoddig
(Data curation, Investigation, Methodology, Writing – original draft)
4
Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen
, 47048 Duisburg, Germany
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Ralf Meckenstock
;
Ralf Meckenstock
(Data curation, Methodology, Supervision)
4
Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen
, 47048 Duisburg, Germany
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Michael Farle
;
Michael Farle
(Resources, Supervision, Writing – review & editing)
4
Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen
, 47048 Duisburg, Germany
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Michael Winklhofer
Michael Winklhofer
a)
(Conceptualization, Funding acquisition, Project administration, Resources, Supervision, Writing – review & editing)
5
Institut für Biologie und Umweltwissenschaften, Carl von Ossietzky Universität Oldenburg
, 26129 Oldenburg, Germany
6
Forschungszentrum Neurosensorik, Carl von Ossietzky Universität Oldenburg
, 26111 Oldenburg, Germany
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 124, 132405 (2024)
Article history
Received:
December 31 2023
Accepted:
March 14 2024
Citation
Benjamin W. Zingsem, Thomas Feggeler, Detlef Spoddig, Ralf Meckenstock, Michael Farle, Michael Winklhofer; Reciprocity relations in a biologically inspired nanomagnonic system with dipolar coupling. Appl. Phys. Lett. 25 March 2024; 124 (13): 132405. https://doi.org/10.1063/5.0195215
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