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XMCD Investigation of Spin Disorder in -Fe2O3 Nanoparticles at the Fe L2,3 Edges.

Abstract : We use XMCD at the L2,3 edges of iron to analyze the site-specific magnetic contributions of ions in nanoparticles of maghemite, -Fe2O3. Maghemite is the oxidized form of magnetite Fe3O4.We report results of the study of the magnetic order on tetrahedral and octahedral magnetic sublattices in -Fe2O3 nanoparticles as a function of the applied magnetic field. Magnetic contributions of Fe3+ Oh and Fe3+ Td are determined using the Ligand Field Multiplet theory. It is found that when the external field decreases, the magnetic contribution of Fe3+ ions on octahedral sites is significantly reduced by comparison to the contribution of Fe3+ ions on tetrahedral ones. This shows that a higher degree of canting exits on octahedral sites.
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https://hal.archives-ouvertes.fr/hal-00083109
Contributor : Sylvia Deplanque Connect in order to contact the contributor
Submitted on : Thursday, June 29, 2006 - 3:14:00 PM
Last modification on : Thursday, December 9, 2021 - 11:58:02 AM

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  • HAL Id : hal-00083109, version 1

Citation

S. Brice-Profeta, M.-A. Arrio, E. Tronc, I. Letard, Ch. Cartier-Dit-Moulin, et al.. XMCD Investigation of Spin Disorder in -Fe2O3 Nanoparticles at the Fe L2,3 Edges.. Physica Scripta, IOP Publishing, 2005, T115, pp.226-228. ⟨hal-00083109⟩

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