Suppression of inherent ferromagnetism in Pr-doped CeO2 nanocrystals

Novica Paunović; Zorana Dohčević-Mitrović; Rareş Scurtu; Sonja Aškrabić; Marija Prekajski; Branko Matović; Zoran V. Popović

doi:10.1039/C2NR30799E

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Suppression of inherent ferromagnetism in Pr-doped CeO₂nanocrystals

Novica Paunović,^a Zorana Dohčević-Mitrović,*^a Rareş Scurtu,^b Sonja Aškrabić,^a Marija Prekajski,^c Branko Matović^c and Zoran V. Popović^a

Author affiliations

* Corresponding authors

^a Institute of Physics, Center for Solid State Physics and New Materials, University of Belgrade, Serbia
E-mail: zordoh@ipb.ac.rs

^b National Institute for Research and Development in Microtechnologies (IMT), Bucharest, Romania

^c Institute of Nuclear Sciences ‘Vinča’, University of Belgrade, Serbia

Abstract

Ce_1−xPr_xO_2−δ (0 ≤ x ≤ 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 CeO₂ 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.

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Article information

DOI: https://doi.org/10.1039/C2NR30799E
Article type: Paper
Submitted: 03 Apr 2012
Accepted: 05 Jul 2012
First published: 10 Jul 2012

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Nanoscale, 2012,4, 5469-5476

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Suppression of inherent ferromagnetism in Pr-doped CeO₂ nanocrystals

N. Paunović, Z. Dohčević-Mitrović, R. Scurtu, S. Aškrabić, M. Prekajski, B. Matović and Z. V. Popović, Nanoscale, 2012, 4, 5469 DOI: 10.1039/C2NR30799E

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