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Title: Ferromagnetic resonance of compensated ferromagnetic/antiferromagnetic bilayers
Authors: Carriço, Artur da Silva
Dantas, Ana L.
Oliveira, L. L.
Silva, M. L.
Keywords: Ferromagnetic resonance
Issue Date: 2-Oct-2012
Publisher: AIP Publishing LLC
Citation: DANTAS, Ana L.; OLIVEIRA, L. L.; SILVA, M. L. ; CARRICÇO, Artur da Silva. Ferromagnetic resonance of compensated ferromagnetic/antiferromagnetic bilayers. Journal of Applied Physics, v. 112, n. 7, p. 073907, 2012. Disponível em: . Acesso: 27. mar. 2012.
Portuguese Abstract: We report a theoretical study of the ferromagnetic resonance (FMR) frequency Ω(H) of Fe/FeF2(110) and Fe/MnF2(110) uniaxial anisotropy compensated bilayers. We show that under external field perpendicular to the anisotropy axis, the uniform mode of the Fe-film becomes soft at an external field strength (H∗=HFA−H⊥int) smaller than the Fe anisotropy field. For strong interface exchange coupling, there is a gap in the FMR spectrum. In this case, Ω(H) is a monotonically increasing function of the external field strength and for any value of the external field strength Ω(H)>Ω(0). The value of the effective interface field downshifts (H⊥int) and the value of Ω(0) may be used to estimate the interface exchange energy.
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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