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A novel broadband ferromagnetic resonance spectrometer

Unwin, M.E and Haycock, P.W and Hoon, Steve R. and Grannell, P.K (1999) A novel broadband ferromagnetic resonance spectrometer. ISSN 0304-8853

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Abstract

A novel ferromagnetic resonance technique has been developed, allowing both swept-field and swept-frequency absorption spectra to be produced using a single broadband spectrometer. A straightforward through-transmission method removes the need for a commercial network analyzer, making this a versatile yet inexpensive tool for the characterization of magnetic materials. Initial results from gamma ferric oxide tape show good agreement with published data from a conventional, swept-field fixed-frequency FMR spectrometer and indicate the potential of this technique which also enables measurements of the magnetic anisotropy. Swept-frequency and swept-field data are presented for a range of sample orientations.

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