反铁磁晶体中的非线性TE表面波  

NONLINEAR TE SURFACE WAVES ON AN ANTI FERROMAGNET

作　　者：王奇[1] 王又发[1] 鲍家善[1] 

机构地区：[1]上海大学物理系

出　　处：《物理学报》1997年第1期145-154,共10页Acta Physica Sinica

摘　　要：将反铁磁晶体中ＴＥ表面波满足的非线性波动方程变形为伯努利微分方程，用反函数形式给出了表面波磁场的精确解．证明非线性ＴＥ表面波存在的必要条件是μｘ＞０．求得了色散方程，分析了非线性ＴＥ波的频率范围．理论结果表明，导波磁场峰值位置具有稳定性，同功率无关；在ε１＞ε２条件下，在功率阈值之上，一个传播功率对应两个不同的有效折射率。Abstract The nonlinear characteristics of TE surface wave on an anti ferromagnet is studied.The nonlinear motion equation for TE wave is converted to Bernoulli differential equation and its exact solution is found in a form of inverse function.The necessary condition for the existence of nonlinear TE surface wave is μ x >0.The dispersion equation and the frequency region are analyzed.The theoretical results show that the peak position of the magnetic field is not a function of power and localized steadily at the surface of the material.In the condition of ε 1>ε 2 one guiding power corresponds two different effective refraction indexes showing the bistable property of the nonlinear TE surface waves.

关 键 词：反铁磁晶体 非线性波动 表面波 

分 类 号：TM271.014[一般工业技术—材料科学与工程]