Suppression of inherent ferromagnetism in Pr-doped CeO sub(2) nanocrystals

Ce sub(1-x)Pr sub(x)O sub(2- delta ) (0 less than or equal to x less than or equal to 0.4) nanocrystals were synthesized by self-propagating method and thoroughly characterized using X-ray diffraction, Raman and X-ray photoelectron spectroscopy and magnetic measurements. Undoped CeO sub(2) nanocryst...

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Bibliographic Details
Published in:Nanoscale 2012-08, Vol.4 (17), p.5469-5476
Main Authors: Paunovic, Novica, Dohcevic-Mitrovic, Zorana, Scurtu, Rares, Askrabic, Sonja, Prekajski, Marija, Matovic, Branko, Popovic, Zoran V
Format: Article
Language:English
Subjects:
Ferromagnetism
Nanocomposites
Nanocrystals
Nanomaterials
Nanostructure
Order disorder
Vacancies
X-rays
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Summary:Ce sub(1-x)Pr sub(x)O sub(2- delta ) (0 less than or equal to x less than or equal to 0.4) nanocrystals were synthesized by self-propagating method and thoroughly characterized using X-ray diffraction, Raman and X-ray photoelectron spectroscopy and magnetic measurements. Undoped CeO sub(2) nanocrystals exhibited intrinsic ferromagnetism at room temperature. Despite the increased concentration of oxygen vacancies in doped samples, our results showed that ferromagnetic ordering rapidly degrades with Pr doping. The suppression of ferromagnetism can be explained in terms of the different dopant valence state, the different nature of the vacancies formed in Pr-doped samples and their ability/disability to establish the ferromagnetic ordering.
ISSN:2040-3364
2040-3372
DOI:10.1039/c2nr30799e