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2024-10-01

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/222121

X-ray spectromicroscopy of single NiOantiferromagnetic nanoparticles

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https://doi.org/10.1063/10.0028630

Resum

The chemical and magnetic properties of NiO nanoparticles (NP) have been studied with single-particle sen-sitivity by means of synchrotron-based, polarization-dependent X-ray absorption spectroscopy using photoemis-sion electron microscopy around the Ni L3,2 edges. Three samples of NP in a size range of 40-120 nm were syn-thesized by thermal decomposition and subsequent calcination processes. The analysis of the local X-ray absorption spectra of tens of individual NP indicates a strong dependence of their Ni oxidation state with the cal-cination protocol of each sample. Additional electron-microscopy-based images and spectra of a few individual NP as well as other standard macroscopic data are in very good agreement with these experimental findings. These results showcase the relevance of combining standard and advanced single-particle studies to gain further insight into the understanding and control of electronic and magnetic phenomena at the nanoscale.

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Nanopartícules, Espectroscòpia de raigs X

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Nanoparticles, X-ray spectroscopy

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Articles publicats en revistes (Química Inorgànica i Orgànica)

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FIGUEROA GARCIA, Adriana Isabel, et al. X-ray spectromicroscopy of single NiOantiferromagnetic nanoparticles. Low Temperature Physics. 2024. Vol. 50, num. 10, pags. 852-861. ISSN 1063-777X. [consulted: 29 of June of 2026]. Available at: https://hdl.handle.net/2445/222121

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