Spin wave modes localised on a nano stripe with two dipole coupled layers

Mikhail Kostylev, A.A. Stashkevich, N.A. Sergeeva, Y. Roussigne

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    The peculiarities of magnetostatic resonances on a tri-layered (ferromagnetic/non-magnetic spacer/ferromagnetic) stripe have been studied. It has been shown that the role of dynamic demagnetising effects at the edges of the stripe depends on the symmetry of the mode: while in anti-symmetric "optical" modes the magnetisation practically vanishes at the edges, it remains definitely non-zero in the case of symmetric "acoustical" modes. In a tri-layer with non-identical ferromagnetic mono-layers, the structure of an individual mode can become extremely complex and asymmetric. Typically, it contains two spatial harmonics, which means that every single mode will produce two optical responses in a Brillouin spectrometer, and the distribution of the dynamic magnetisation in layers differs significantly. To quantify the investigated effects the analytical technique, developed earlier for mono-layered stripes, has been extended to the multilayer case. (C) 2004 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)397-406
    JournalJournal of Magnetism and Magnetic Materials
    Issue number3
    Publication statusPublished - 2004


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