supported in part by NSFC(No.10771226,No.10861014);in part innovative Talent Training Project,the Third Stage of”211 Project”;Chongqing University,Project Number:S-09110
In 1935,the famous L-L equations were proposed by Landau and Lifshitz in[7]to describe the evolution of spin fields in continuum ferromagnets.In this paper we study two important L-L equations as