XMCD Proof of Ferromagnetic Behavior in ZnO Nanoparticles

The combined element-specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) study of ZnO nanoparticles (NPs) capped with organic molecules confirms the occurrence of intrinsic ferromagnetic-like (FML) behavior up to room temperature (HTFM). Zn K-edge XMCD measureme...

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Published in:Journal of physical chemistry. C 2012-03, Vol.116 (11), p.6608-6614
Main Authors: Guglieri, C, Laguna-Marco, M. A, García, M. A, Carmona, N, Céspedes, E, García-Hernández, M, Espinosa, A, Chaboy, J
Format: Article
Language:English
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
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cited_by cdi_FETCH-LOGICAL-a390t-60c5ad79000242d19bc93390c0701d5dd50cb5acd68f779b7e25959cd5a739543
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creator Guglieri, C
Laguna-Marco, M. A
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description The combined element-specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) study of ZnO nanoparticles (NPs) capped with organic molecules confirms the occurrence of intrinsic ferromagnetic-like (FML) behavior up to room temperature (HTFM). Zn K-edge XMCD measurements reveal the coexistence of two different magnetic contributions: a paramagnetic response from the core of the NP, and a ferromagnetic-like contribution stemming from the interface formed between the ZnO core of the NP and the organic molecule. The extent and conformation of this interface depends on the capping molecule, and as demonstrated in ZnO/ZnS heterostructures, the FML behavior is reinforced when neat interfaces are formed.
doi_str_mv 10.1021/jp300837f
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
title XMCD Proof of Ferromagnetic Behavior in ZnO Nanoparticles
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