{"paper":{"title":"Geometry-controlled magnon-polaritons of double magnetic films in planar cavities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Placing two magnetic films inside one planar cavity lets their positions in the standing wave tune the strength of the collective magnon-photon interaction.","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Ahmad R. T. Nugraha, Muhammad Aziz Majidi, S. Solihin","submitted_at":"2026-04-13T16:31:31Z","abstract_excerpt":"Planar cavity magnonics has been developed mainly for a single magnetic film, leaving multilayer behavior in spatially resolved cavity scattering largely unexplored. Here, we introduce a double layer planar cavity with two magnetic films embedded in the same microwave cavity to derive a full two-film scattering theory in the macrospin ($J = 0$) limit and recover the exact zero-gap half-thickness limit, thereby benchmarking the model against the known one-film result. We find that the double layer model actively enables geometry-controlled bright-channel enhancement, demonstrating that the magn"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The bilayer does not simply strengthen the magnon-photon interaction by adding magnetic material but instead enables position-dependent control of the collective bright channel.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the two films interact solely through the shared cavity field and their relative placement in the standing-wave pattern, with no significant direct dipolar or exchange coupling between layers.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Bilayer planar cavities allow position- and symmetry-controlled magnon-polariton excitations by reorganizing bright and dark channels in macrospin and multimode regimes.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Placing two magnetic films inside one planar cavity lets their positions in the standing wave tune the strength of the collective magnon-photon interaction.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1b5c215b56a2a29683b74adc5b656646900c134dfac24e1c8702c09ed9d11623"},"source":{"id":"2604.11690","kind":"arxiv","version":2},"verdict":{"id":"f8eda900-83c8-45b5-904e-ece366dd6a45","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T14:58:49.625866Z","strongest_claim":"The bilayer does not simply strengthen the magnon-photon interaction by adding magnetic material but instead enables position-dependent control of the collective bright channel.","one_line_summary":"Bilayer planar cavities allow position- and symmetry-controlled magnon-polariton excitations by reorganizing bright and dark channels in macrospin and multimode regimes.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the two films interact solely through the shared cavity field and their relative placement in the standing-wave pattern, with no significant direct dipolar or exchange coupling between layers.","pith_extraction_headline":"Placing two magnetic films inside one planar cavity lets their positions in the standing wave tune the strength of the collective magnon-photon interaction."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.11690/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}