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arxiv: 2605.16946 · v1 · pith:IGRLEYE5new · submitted 2026-05-16 · ❄️ cond-mat.mes-hall

Reprogrammable magnonic logic in a multiferroic heterostructure via magnetoelectric coupling

Ping Che , Amr Abdelsamie , \'Ad\'am Papp , Sali Salama , Andr\'e Thiaville , Romain Lebrun , St\'ephane Fusil , Vincent Garcia
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Aymeric Vecchiola Karim Bouzehouane Manuel Bibes Agn\`es Barth\'el\'emy Jean-Paul Adam Vladislav Demidov Paolo Bortolotti Abdelmadjid Anane Isabella Boventer
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Pith reviewed 2026-05-19 19:39 UTC · model grok-4.3

classification ❄️ cond-mat.mes-hall
keywords multiferroic heterostructuremagnetoelectric couplingmagnon dispersionferroelectric domain engineeringreconfigurable magnonicsBrillouin light scatteringspin-wave waveguidesnon-volatile control
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The pith

Ferroelectric domain patterns in BiFeO3 tune magnon frequencies in adjacent La0.67Sr0.33MnO3 by up to 150 MHz through magnetoelectric coupling.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper establishes that writing specific ferroelectric domain structures into a BiFeO3 layer produces deterministic, spatially varying changes in the spin-wave dispersion of the neighboring La0.67Sr0.33MnO3 film. These changes appear as frequency shifts reaching 150 MHz and as voltage-defined waveguides that can be rewritten without losing their configuration when power is removed. A reader would care because the method replaces continuous current or strain drives with a non-volatile voltage pattern, lowering energy use for on-chip magnonic signal processing and logic. Direct imaging confirms the waveguides form where intended, and simulations show the same platform can route different frequencies separately.

Core claim

The authors establish that ferroelectric domain engineering in BiFeO3 within a BiFeO3/La0.67Sr0.33MnO3 heterostructure enables deterministic tuning of the magnon dispersion in La0.67Sr0.33MnO3 via magnetoelectric coupling at the interface. This produces frequency shifts of up to approximately 150 MHz and permits electrically defined, reconfigurable magnonic waveguides. Micro-focused Brillouin light scattering directly images the resulting spatial control, while inverse-design simulations demonstrate that the platform supports advanced functions such as frequency demultiplexing.

What carries the argument

Magnetoelectric coupling at the BiFeO3/La0.67Sr0.33MnO3 interface, which maps chosen ferroelectric domain patterns onto local changes in magnon dispersion.

If this is right

  • Voltage-defined magnonic waveguides become non-volatile and reversible without continuous drive current.
  • Frequency shifts of 150 MHz enable programmable dispersion for on-chip signal routing.
  • Inverse-design simulations confirm the heterostructure can perform frequency demultiplexing.
  • The platform extends directly to magnonic logic, reservoir computing, and neuromorphic applications.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same domain-engineering approach could be combined with existing ferroelectric memory fabrication to create hybrid magnonic circuits at wafer scale.
  • Testing other multiferroic material pairs might increase the frequency shift range or lower the required voltage.
  • Embedding inverse-design tools with the heterostructure could allow automated layout of complex magnonic functions without manual waveguide design.

Load-bearing premise

The magnetoelectric coupling at the interface must be strong enough, uniform, and stable to convert any chosen ferroelectric domain pattern into consistent and repeatable shifts in magnon dispersion.

What would settle it

Repeatedly writing the same ferroelectric domain pattern and measuring no reproducible frequency shift or waveguide formation in the La0.67Sr0.33MnO3 layer would falsify the deterministic tuning claim.

Figures

Figures reproduced from arXiv: 2605.16946 by Abdelmadjid Anane, \'Ad\'am Papp, Agn\`es Barth\'el\'emy, Amr Abdelsamie, Andr\'e Thiaville, Aymeric Vecchiola, Isabella Boventer, Jean-Paul Adam, Karim Bouzehouane, Manuel Bibes, Paolo Bortolotti, Ping Che, Romain Lebrun, Sali Salama, St\'ephane Fusil, Vincent Garcia, Vladislav Demidov.

Figure 1
Figure 1. Figure 1: FIG. 1 [PITH_FULL_IMAGE:figures/full_fig_p005_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2 [PITH_FULL_IMAGE:figures/full_fig_p007_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3 [PITH_FULL_IMAGE:figures/full_fig_p009_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4 [PITH_FULL_IMAGE:figures/full_fig_p011_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5 [PITH_FULL_IMAGE:figures/full_fig_p020_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6 [PITH_FULL_IMAGE:figures/full_fig_p021_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: FIG. 7 [PITH_FULL_IMAGE:figures/full_fig_p022_7.png] view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8 [PITH_FULL_IMAGE:figures/full_fig_p023_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: FIG. 9 [PITH_FULL_IMAGE:figures/full_fig_p024_9.png] view at source ↗
read the original abstract

The realization of fully reconfigurable, voltage-controlled, and programmable on-chip magnonic devices is essential to fully harness the potential of spin waves for signal processing, logic and neuromorphic computing. Yet, existing demonstrations of electrical tuning of magnonic responses are either volatile, current-driven and thus energy-inefficient, or rely on local strain modification limiting their scalability for wafer-scale integration. Here, we address this challenge using a BiFeO3/La0.67Sr0.33MnO3 multiferroic thin film heterostructure. We show that ferroelectric domain engineering in BiFeO3 enables deterministic tuning of the magnon dispersion of La0.67Sr0.33MnO3, producing frequency shifts up to $\sim 150 MHz$ and allowing reconfigurable waveguiding. Micro-focused Brillouin light scattering directly images these effects, revealing electrically defined magnonic waveguides and spatially programmable dispersion. Compared to conventional approaches, this method provides non-volatile and reversible control. Furthermore, using an inverse-design simulation code, we demonstrate the capability of our platform to perform advanced magnonic functions such as frequency demultiplexing. Our results open a new avenue for using magnetoelectric heterostructures for magnonic logic, with further applicability to reservoir and neuromorphic computing and AI driven magnonic devices.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript demonstrates that ferroelectric domain engineering in a BiFeO3/La0.67Sr0.33MnO3 multiferroic heterostructure enables deterministic, non-volatile, and reversible tuning of the magnon dispersion in the LSMO layer via magnetoelectric coupling. This produces frequency shifts up to ~150 MHz, allows electrically defined reconfigurable magnonic waveguides, and supports advanced functions such as frequency demultiplexing, as shown by micro-focused Brillouin light scattering (BLS) imaging and inverse-design simulations.

Significance. If the central claims hold, the work offers a promising route toward scalable, voltage-controlled magnonic logic with non-volatile programmability, addressing limitations of current-driven or strain-based tuning methods. The direct BLS imaging of dispersion shifts and waveguiding, together with the inverse-design simulations demonstrating demultiplexing, provides concrete evidence of functionality and strengthens applicability to neuromorphic and reservoir computing.

major comments (2)
  1. [§3] §3 (BLS imaging results): The reported frequency shifts of up to ~150 MHz are presented without visible error bars, standard deviations from repeated measurements, or full raw datasets, which weakens the claim of deterministic and repeatable domain-to-magnon mapping.
  2. [§4] §4 (magnetoelectric coupling analysis): The manuscript does not include quantitative controls or separate measurements to isolate the magnetoelectric contribution from possible strain or defect effects at the interface, leaving the weakest assumption (uniform and stable coupling) insufficiently tested.
minor comments (2)
  1. [Figure 2] Figure 2 and associated text: The domain patterns and corresponding BLS intensity maps would benefit from explicit scale bars and clearer labeling of the voltage polarity used for writing.
  2. [Methods] Methods section: The inverse-design simulation parameters and the procedure for validating simulated dispersion against experimental BLS data should be described in more detail to support reproducibility.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their constructive review and recommendation for minor revision. We address each major comment point by point below, providing clarifications and indicating revisions to the manuscript where appropriate.

read point-by-point responses

  1. Referee: [§3] §3 (BLS imaging results): The reported frequency shifts of up to ~150 MHz are presented without visible error bars, standard deviations from repeated measurements, or full raw datasets, which weakens the claim of deterministic and repeatable domain-to-magnon mapping.

    Authors: We agree that statistical presentation strengthens the claims of determinism and repeatability. In the revised manuscript, error bars derived from the standard deviation across five repeated BLS measurements at each position and domain configuration have been added to the frequency-shift data in Figure 3. A new supplementary section now includes representative raw BLS spectra together with the tabulated frequency values from all repeated scans, confirming that the shifts remain consistent within the reported range. revision: yes

  2. Referee: [§4] §4 (magnetoelectric coupling analysis): The manuscript does not include quantitative controls or separate measurements to isolate the magnetoelectric contribution from possible strain or defect effects at the interface, leaving the weakest assumption (uniform and stable coupling) insufficiently tested.

    Authors: We acknowledge that a fully quantitative separation of magnetoelectric coupling from interfacial strain or defect contributions would require additional control experiments. The original analysis correlates the observed non-volatile frequency shifts directly with the ferroelectric domain patterns imaged by PFM and shows consistency with established magnetoelectric coefficients for the BiFeO3/LSMO system. In the revision we have expanded the discussion in Section 4 to include a back-of-the-envelope estimate demonstrating that the magnitude and sign of the shifts exceed those expected from residual strain under substrate clamping alone. We have also noted that the observed reversibility and spatial programmability are more readily explained by magnetoelectric coupling than by static strain or defects. Complete isolation would necessitate new sample series (e.g., temperature-dependent or non-ferroelectric control layers) that lie outside the present scope. revision: partial

Circularity Check

0 steps flagged

No significant circularity in derivation or claims

full rationale

The manuscript is primarily experimental, relying on direct micro-focused Brillouin light scattering measurements of magnon dispersion shifts, voltage-dependent spectra, and domain imaging in the BiFeO3/LSMO heterostructure. These observations provide independent empirical grounding for the reported frequency shifts (~150 MHz) and reconfigurable waveguiding. The inverse-design simulations are presented as a demonstration tool applied to the measured platform parameters rather than a self-referential derivation. No load-bearing steps reduce by construction to fitted inputs, self-citations, or ansatzes from the authors' prior work; the central mapping from ferroelectric domains to magnon dispersion is supported by external data acquisition and does not loop back to quantities defined within the paper itself.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on the existence of usable magnetoelectric coupling in the specific heterostructure; no new free parameters, invented particles, or ad-hoc entities are introduced in the abstract. Standard assumptions of thin-film multiferroic physics are invoked.

axioms (1)
  • domain assumption Magnetoelectric coupling at the BiFeO3/LSMO interface is sufficient to produce deterministic, spatially programmable changes in magnon dispersion from ferroelectric domain patterns.
    This premise is required for the observed frequency shifts and waveguiding to follow from domain engineering; it is supported by the reported measurements but not derived from first principles in the abstract.

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