Instabilities of spin waves in parallel‐pumped easy plane ferromagnets
نویسندگان
چکیده
منابع مشابه
Spin-Waves in itinerant ferromagnets
We introduce a novel approach for the investigation of spin-wave excitations in itinerant ferromagnets. Our theory is based on a variational treatment of general multi-band Hubbard models which describe elements and compounds of transition metals. The magnon dispersion is derived approximately as the energy of a variational spin-wave state in the limit of large spatial dimensions. A numerical e...
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An analysis of the core region of an in-plane vortex in the two-dimensional Heisenberg model with easy-plane anisotropy λ = Jz/Jxy leads to a clear understanding of the instability towards transformation into an out-of-plane vortex as a function of anisotropy. The anisotropy parameter λc at which the in-plane vortex becomes unstable and develops into an out-of-plane vortex is determined with an...
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We investigate the nonlinear dynamics underlying the evolution of a 2-D ferromagnetic film with uniaxial anisotropy and an oscillating magnetic field. Considering the associated Landau-Lifshitz spin evolution equation with Gilbert damping included, we study the dynamics in terms of the stereographic variable. We identify several new fixed points for suitable choice of external field. In particu...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 1988
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.340523