CAJ | 학술논문

基于等效介质理论计算了半无限侧向 Fe/Ni 体系超晶格的体模式，通过对体极化子禁带宽度的讨论给出了自旋波在该体系下传播区域的改变。外场较小时磁性层的磁比例因子与外场对禁带宽度的影响规律性较强，Ni层越厚、外场越大禁带宽度越大。外场增大使趋肤效应与涡流损耗效应增强，导致自旋波衰减，禁带宽度变化情况复杂化。讨论结果与J.Barnas利用传输矩阵方法算出的磁性/非磁性超晶格推迟模式的体极化子的色散曲线很相似。对比发现，等效介质理论更具简便性，在所研究体系中第二种磁性介质的饱和磁化强度趋于0时即为J.Barnas的磁性/非磁性超晶格。
기우등효개질이론계산료반무한측향 Fe/Ni 체계초정격적체모식，통과대체겁화자금대관도적토론급출료자선파재해체계하전파구역적개변。외장교소시자성층적자비례인자여외장대금대관도적영향규률성교강，Ni층월후、외장월대금대관도월대。외장증대사추부효응여와류손모효응증강，도치자선파쇠감，금대관도변화정황복잡화。토론결과여J.Barnas이용전수구진방법산출적자성/비자성초정격추지모식적체겁화자적색산곡선흔상사。대비발현，등효개질이론경구간편성，재소연구체계중제이충자성개질적포화자화강도추우0시즉위J.Barnas적자성/비자성초정격。
Based on equivalent medium theory, body model of semi-infinite lateral Fe/Ni system superlattice was calculated. By discussion of forbidden band width of body polaron transmission area change of spin wave in the system is given. Under lower field the magnetic scale factor of magnetic layer and the field has stronger influence on the forbidden band width, or thicker Ni layer and higher applied field result in wider forbidden band width. Field increase enhance the skin effect and eddy current loss, leading to spin wave attenuation and complication of forbidden band width changes. The results is in accordance with the body polaron dispersion curve of the magnetic/nonmagnetic superlattice delay model given by J.Barnas using transfer matrix method. Compared to transfer matrix method, equivalent medium theory is more simple, and when saturation magnetization of the second magnetic media tends to zero, the system is as magnetic/nonmagnetic superlattices.