Limiting behavior of solutions of multidimensional Landau-Lifshitz equations with second approximation of effective field (I)

By a maximum principle under global control map from $R^{n+1}$ to$S^2,$ $δ$-viscosity supersolution and subsolution of multidimensional Landau-Lifshitz equations with second approximation of effective field are built. Utilizing the $δ$-viscosity supersolution and subsolution, the viscosity solution of the equations is showed and the limiting behavior of the solution of the equations is obtained. Exactly, there exist two disjoint open subsets such that the solutions tend to the point $(0,1,0)$ on arbitrary compact subsets in one of them and tend to the point $(0,-1,0)$ on arbitrary compact subsets in the other of them, respectively.

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