Domain instability during magnetization precession.
Spin wave equations describing the nonequilibrium precessional state of a ferromagnetic system are given. The equations reveal a new type of spin wave instability (SWI) towards growing domains of uniform magnetization. In the developed stages of SWI a nonstationary picture of domain chaos is revealed by numerical simulations. SWI is capable of explaining recent experimental observation of stochastic switching in precessional magnetization reversal.
Kashuba
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L.D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 2 Kosygina Street, 119334 Moscow, Russia.