Angular control of a hybrid magnetic metamolecule using anisotropic FeCo
By coupling magnetic elements to metamaterials, hybrid metamolecules can be created with useful properties such as photon-magnon mode mixing. Here, we present results for a split-ring resonator (SRR) placed in close proximity to a thin crystalline film of magnetically hard FeCo. Eddy-current shieldi...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Published: |
American Physical Society
2015
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| _version_ | 1797078137302941696 |
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| author | Gregory, S Maple, L Stenning, G Hesjedal, T van der Laan, G Bowden, G |
| author_facet | Gregory, S Maple, L Stenning, G Hesjedal, T van der Laan, G Bowden, G |
| author_sort | Gregory, S |
| collection | OXFORD |
| description | By coupling magnetic elements to metamaterials, hybrid metamolecules can be created with useful properties such as photon-magnon mode mixing. Here, we present results for a split-ring resonator (SRR) placed in close proximity to a thin crystalline film of magnetically hard FeCo. Eddy-current shielding is suppressed by patterning the FeCo into 100-μm disks. At the ferromagnetic resonance (FMR) condition of FeCo, photon-magnon coupling strengths of 5% are observed. Altogether, three distinct features are presented and discussed: (i) remanent magnets allow FMR to be performed in a near-zero field, partially eliminating the need for applied fields; (ii) the anisotropic FMR permits angular control over hybrid SRR and FMR resonances; and (iii) the in-plane and out-of-plane magnetization of FeCo opens the door to “magnetically configurable metamaterials” in real time. Finally, a special study is presented of how best to excite the numerous transverse magnetic and electric modes of the SRR by using near-field excitation from a coplanar waveguide. |
| first_indexed | 2024-03-07T00:28:12Z |
| format | Journal article |
| id | oxford-uuid:7ed8fcbd-71df-43af-a465-cab934a5bc9f |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:28:12Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:7ed8fcbd-71df-43af-a465-cab934a5bc9f2022-03-26T21:12:57ZAngular control of a hybrid magnetic metamolecule using anisotropic FeCoJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7ed8fcbd-71df-43af-a465-cab934a5bc9fSymplectic Elements at OxfordAmerican Physical Society2015Gregory, SMaple, LStenning, GHesjedal, Tvan der Laan, GBowden, GBy coupling magnetic elements to metamaterials, hybrid metamolecules can be created with useful properties such as photon-magnon mode mixing. Here, we present results for a split-ring resonator (SRR) placed in close proximity to a thin crystalline film of magnetically hard FeCo. Eddy-current shielding is suppressed by patterning the FeCo into 100-μm disks. At the ferromagnetic resonance (FMR) condition of FeCo, photon-magnon coupling strengths of 5% are observed. Altogether, three distinct features are presented and discussed: (i) remanent magnets allow FMR to be performed in a near-zero field, partially eliminating the need for applied fields; (ii) the anisotropic FMR permits angular control over hybrid SRR and FMR resonances; and (iii) the in-plane and out-of-plane magnetization of FeCo opens the door to “magnetically configurable metamaterials” in real time. Finally, a special study is presented of how best to excite the numerous transverse magnetic and electric modes of the SRR by using near-field excitation from a coplanar waveguide. |
| spellingShingle | Gregory, S Maple, L Stenning, G Hesjedal, T van der Laan, G Bowden, G Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title | Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title_full | Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title_fullStr | Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title_full_unstemmed | Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title_short | Angular control of a hybrid magnetic metamolecule using anisotropic FeCo |
| title_sort | angular control of a hybrid magnetic metamolecule using anisotropic feco |
| work_keys_str_mv | AT gregorys angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco AT maplel angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco AT stenningg angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco AT hesjedalt angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco AT vanderlaang angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco AT bowdeng angularcontrolofahybridmagneticmetamoleculeusinganisotropicfeco |