三层不对称铁磁膜中的自旋波体模

The Bulk Modes of Spin Waves in an Unsymmetrical Ferromagnetic Trilayer Film

本文研究了表面钉扎的Ａ、Ｂ、Ｃ三层不对称铁磁膜，利用界面重标度方法，求解了自旋波的低能量子本征问题．数值计算结果表明，当相邻层的界面处自旋波完全钉扎或近钉扎时．在Ｊ＿ｉＳ＿ｉ（ｉ＝Ａ、Ｂ、Ｃ）值较小的一层，发生自旋波的共振局域现象．

n this paper, an unsymmetrical ferromagnetic trilayer film pinned at the surfaces is investi-gated by using of the rescaling interface method. The quantum eigenproblem is discussed withinlow energy region. It is shown from the numerical results that the resonant confinement may oc-curs in the sublayer with less J_iS_i(i=A、B 、C)while the spin waves in their neighbour sublayersare pinned or nearer pinned at the interfaces.