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磁振子晶体是光子晶体或声子晶体在磁性材料领域内的替代品,是近来的一个研究热点.本文提出了磁振子晶体领域内的一种平面波展开法,其较传统的平面波展开法能节约一半以上的计算时间.采用此方法,数值计算了由Fe/EuO二种铁磁材料构成的二维磁振子晶体带结构.数值计算结果表明,在一定的体积填充率下,有自旋波带隙的出现;影响磁振子晶体带隙结构形成的主要因素是有效场中的交换作用场,其他作用场的影响相对很小.
Magnetron crystal is a substitute of photonic crystal or phonon crystal in the field of magnetic materials and is a hot research topic in recent years.In this paper, a method of plane wave expansion in the field of magnetic crystal oscillator is proposed, which can save more than the traditional method of plane wave expansion More than half of the computational time.Using this method, the two-dimensional magnetic crystal structure of two-dimensional ferroelectric crystal composed of two kinds of Fe / EuO ferromagnetic materials is numerically calculated.The numerical results show that at a certain volume filling rate, The main factor that affects the formation of the band gap structure of the crystal is the exchange field in the effective field, and the influence of other fields is relatively small.