Resonance behavior of embedded and freestanding microscale ferromagnets
The ferromagnetic resonance of a disordered A2 Fe 60 Al 40 ferromagnetic stripe, of dimensions 5 µm × 1 µm × 32 nm, has been observed in two vastly differing surroundings: in the first case, the ferromagnetic region was surrounded by ordered B2 Fe 60 Al 40 , and in the second case it was free standi...
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Veröffentlicht in: | Scientific reports 2022-08, Vol.12 (1), p.14809-14809, Article 14809 |
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Hauptverfasser: | , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The ferromagnetic resonance of a disordered A2 Fe
60
Al
40
ferromagnetic stripe, of dimensions 5 µm × 1 µm × 32 nm, has been observed in two vastly differing surroundings: in the first case, the ferromagnetic region was surrounded by ordered B2 Fe
60
Al
40
, and in the second case it was free standing, adhering only to the oxide substrate. The embedded ferromagnet possesses a periodic magnetic domain structure, which transforms to a single domain structure in the freestanding case. The two cases differ in their dynamic response, for instance, the resonance field for the uniform (
k
= 0) mode at ~ 14 GHz excitation displays a shift from 209 to 194 mT, respectively for the embedded and freestanding cases, with the external magnetic field applied along the long axis. The resonant behavior of a microscopic ferromagnet can thus be finely tailored via control of its near-interfacial surrounding. |
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ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-022-15959-0 |