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Weak Formulations for Calculating Spin Wave Dispersion Relation in Magnonic Crystals
Publié en 2013
We study the spin wave excitation (coherent precession of magnetic moments) in periodically arranged magnetic stripes, i.e., in one-dimensional magnonic crystal (MC). Two approaches have been implemented. We have defined a structure that dispersion relation can be obtained using both approaches and compared them. In general, the approach I has to be used for MCs where the exchange interactions are important (small lattice constant), while the approach II is useful in the structures with large thickness a low exchange coefficient.
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