二维复式晶格磁振子晶体的带隙结构

发布时间：2018-06-13 23:52

本文选题：磁振子晶体 + 复式晶格　；参考：《物理学报》2016年15期

【摘要】：提出了一种复式晶格磁振子晶体的模型,该模型由两种铁磁材料散射体周期排列在另一种铁磁材料基底中构成.应用超原胞的思想拓展了平面波展开法,用于数值计算研究自旋波在复式晶格磁振子晶体中的本征性质本文数值计算了由两种大小不同的铁(Fe)-铁(Fe)圆柱体交替正方排列在氧化铕(EuO)基底材料中构成的二维复式晶格磁振子晶体的带结构,研究了带隙宽度随体积填充率的变化行为,并与同一铁(Fe)圆柱正方排列在氧化铕(EuO)基底材料中构成的简单晶格磁振子晶体的带隙结构随体积填充率的变化行为进行了比较.结果表明,利用复式晶格可以优化或调节自旋波带隙的宽度和频率位置.
[Abstract]:A model of magnetic oscillator crystal with compound lattice is proposed. The model is composed of two kinds of ferromagnetic material scatterers arranged periodically in the substrate of another ferromagnetic material. The plane wave expansion method is extended by using the idea of supercell. A numerical study of the intrinsic properties of spin waves in the magnetic oscillator crystals of a compound lattice the two-dimensional structure of two different sizes of Fe (Fe) -Fe (Fe) Fe) cylinders arranged alternately in europium oxide (europium oxide) substrates has been numerically calculated. The band structure of the magnetic oscillator crystal of a compound lattice, The variation behavior of band gap width with volume filling ratio is studied, and the variation behavior of band gap structure with volume filling ratio of simple lattice magnetron crystal is compared with the simple lattice magnetic oscillator crystal which is arranged in the same Fe (Fe) cylinder square in europium oxide Euo substrate material. The results show that the width and frequency position of the spin-wave band gap can be optimized or adjusted by using the complex lattice.
【作者单位】：内蒙古师范大学物理与电子信息学院;
【基金】：国家自然科学基金(批准号:11264028) 内蒙古自治区自然科学基金(批准号:2015BS0106) 内蒙古师范大学2015年度研究生创新基金(批准号:CXJJS15076)资助的课题~~
【分类号】：O737

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