Magnetization dynamics of weak stripe domains in Fe–N thin films: a multitechnique complementary approach - Archive ouverte HAL Access content directly
Journal Articles Journal of Physics: Condensed Matter Year : 2017

Magnetization dynamics of weak stripe domains in Fe–N thin films: a multitechnique complementary approach

Dynamique d'aimantation des domaines à ruban dans le système FeN: une approche multitechnique.

Abstract

The resonant eigenmodes of a nitrogen-implanted iron α'-FeN characterized by weak stripe domains are investigated by Brillouin light scattering and broadband ferromagnetic resonance experiments, assisted by micromagnetic simulations. The spectrum of the dynamic eigenmodes in the presence of the weak stripes is very rich and two different families of modes can be selectively detected using different techniques or different experimental configurations. Attention is paid to the evolution of the mode frequencies and spatial profiles under the application of an external magnetic field, of variable intensity, in the direction parallel or transverse to the stripes. The different evolution of the modes with the external magnetic field is accompanied by a distinctive spatial localization in specific regions, such as the closure domains at the surface of the stripes and the bulk domains localized in the inner part of the stripes. The complementarity of BLS and FMR techniques, based on different selection rules, is found to be a fruitful tool for the study of the wealth of localized magnetic excitations generally found in nanostructures.
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Dates and versions

hal-01632838 , version 1 (16-11-2017)

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Ibrahima Sock Camara, S. Tacchi, Louis Charles Garnier, M. Eddrief, Franck Fortuna, et al.. Magnetization dynamics of weak stripe domains in Fe–N thin films: a multitechnique complementary approach. Journal of Physics: Condensed Matter, 2017, 29 (46), pp.465803 ⟨10.1088/1361-648X/aa8f36⟩. ⟨hal-01632838⟩
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