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Spherical cone symmetric families generated by Landau-Lifshitz equation and their evolution. (Chinese. English summary) Zbl 1488.35519

Summary: Until 2008, we had not seen a paper about the explicit dynamic solution of the multi-dimensional Landau-Lifshitz equation with the external magnetic field and anisotropy field. In the absence of an external magnetic field or anisotropy field, many experts have tried Hirota’s famous method, Lie algebra structure and Bäcklund transformations, bilinear transform and so on, but the exact solution is still not constructed. This paper presents a method to solve the Landau-Lifshitz equations with the external magnetic field and anisotropy field, and a new family of symmetric solutions, which we call it as spherical cone symmetric solution. Then, we show how these solutions evolve with time. Finally, we give a series of explicit dynamic spherical cone symmetric solutions.

MSC:

35Q60 PDEs in connection with optics and electromagnetic theory
35A25 Other special methods applied to PDEs
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