Magnetostatic interactions in a natural magnetite-ulvöspinel system

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Magnetostatic interactions in a natural magnetite-ulvöspinel system

[1] Magnetostatic interactions have been investigated in an intergrown material consisting of 200-nm magnetite blocks separated by 30-nm-wide ulvöspinel lamellae. First-order reversal curve (FORC) measurements provide a direct measure of the interaction fields, giving a value for the full width at half maximum (FWHM) of 30 mT (at Hc = 20 mT). Hysteresis parameters are Mrs/Ms = 0.22, Hcr/Hc = 1....

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The magnetic microstructure of a natural, finely exsolved intergrowth of submicron magnetite blocks in an ulvöspinel matrix is characterized by using off-axis electron holography in the transmission electron microscope. Single-domain and vortex states in individual blocks, as well as magnetostatic interaction fields between them, are imaged at a spatial resolution approaching the nanometer scal...

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ژورنال

عنوان ژورنال: Journal of Geophysical Research: Solid Earth

سال: 2006

ISSN: 0148-0227

DOI: 10.1029/2006jb004454