Formation of Dynamic Domains in Strongly Driven Ferromagnets

Details Formation of Dynamic Domains in Strongly Driven Ferromagnets Formation of Dynamic Domains in Strongly Driven Ferromagnets

1995-01-10

arxiv.org/abs/chao-dyn/9501006v2

Nonlinear Sciences

Chaotic Dynamics

to be published in Phys. Rev. Letters, RevTeX, 4 pages, figures available via ftp@athene.fkp.physik.th-darmstadt.de in /pub/

Scientific paper

10.1103/PhysRevLett.75.144

Based on the dissipative Landau-Lifshitz equation, the spatiotemporal structure formation problem is investigated in the region far above the transverse ferromagnetic resonance instability. Apart from the external fields, the model contains an isotropic exchange field, a shape demagnetisation field and an anisotropy field. Numerical simulations exhibit in the rotating frame a stationary domain structure with a precessing motion in the walls regimes. Employing analytical methods, characteristic elements of this structure are explained. This driven dissipative system shows similarities to equilibrium systems of coexisting phases and organises itself in such a way that the local dynamics tends to become hamiltonian.

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