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- W1676127078 abstract "Ferromagnetic resonance (FMR) in exchange-coupled bilayer films has been the subject of intensive studies in recent years. From the experimental viewpoint, a characteristic feature of this FMR is that some specimens show single resonance, whereas others show double resonance. Moreover, double resonance can exhibit a regular pattern, in which the high-field (HF) line intensity surpasses that of the low-field (LF) line, or it can exhibit an inverted pattern with the HF line less intense than the LF line. There is a general belief that the inverted FMR pattern occurs when the HF line is an optic i.e. an out-of-phase composition of individual sublayer modes, and the LF line is an acoustic or an in-phase mode composition. The existing theoretical explanations of bilayer ferromagnetic resonance are, as a rule, based on phenomenological equation of motion of the magnetization vector. In this paper, we propose a theory of FMR in ultrathin bilayers based on an entirely microscopic approach, using the Heisenberg model of localized spins and assuming that the two ferromagnetic sublayers are exchange-coupled through their interface. This rigorous microscopic FMR theory does explain the inverted pattern of the bilayer FMR spectrum by assuming the HF line to correspond to an in-phase mode, but of interface-localized nature; this gives a possibility to explore the HF resonance line corresponding to the interface-localized mode as a potential source of information concerning the bilayer interface." @default.
- W1676127078 created "2016-06-24" @default.
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- W1676127078 date "2004-02-18" @default.
- W1676127078 modified "2023-09-27" @default.
- W1676127078 title "Interface-Localized Mode In Bilayer Film Ferromagnetic Resonance Spectrum" @default.
- W1676127078 hasPublicationYear "2004" @default.
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