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A high-frequency technique (50 GHz) for determining the magnetic parameters from localized excitations in magnetic materials has been proposed and used for the case of barium hexaferrites. The technique involves the formation of a cut-off resonator in a metal iris–ferrite–metal structure in which magnetostatic forward volume waves are excited only in the region under the iris. Magnetic and high-frequency parameters obtained for barium hexaferrite are in agreement with previously reported values. The possibility of extending the technique for mapping magnetic parameters for films on large substrates is discussed.
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Zavislyak et al. (2009) studied this question.
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