摘要
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.
Recently, magnonic crystals which are the magnetic counterparts of photonic crystals or phononic crystals are growing into a hot area of research. In this paper, a plane-wave expansion method in the field of magnonic crystals is proposed. By using this method, band structures of two-dimensional magnonic crystals composed of ferromagnetic materials Fe and EuO are calculated. The numerical results show that the spin-wave gaps will be generated under a definite filling fraction ratio, and the effect of exchange field on the band structure is larger than that of other field in the effective field.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第7期700-703,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10947008
50901039
11072104)
内蒙古大学高层次人才引进基金(批准号:Z20090146)资助的课题~~
关键词
磁振子晶体
带隙
平面波展开法
magnonic crystals, band gap, paine-wave expansion method