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Influence of the particle size reduction on magnetic properties of electron-doped Ca1-xYxMnO3

Author(s): Alqat Aboalqasim | Gebrel Zohra | Spasojević Vojislav | Kusigerski Vladan | Bošković Snežana | Blanuša Jovan

Journal: Nuclear Technology and Radiation Protection
ISSN 1451-3994

Volume: 27;
Issue: 4;
Start page: 351;
Date: 2012;
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Keywords: electron-doped manganite | nanostructure | magnetic property

The electron-doped magnetic nanoparticles of Ca1-xYxMnO3 (x = 0, 0.05, 0.10, 0.15, 0.20, and 0.30) manganite with an average particle size of 50 nm are analyzed and discussed in relation to their bulk counterparts. Nanoparticle samples show dominant anti-ferromagnetic ordering with a significant increase of coercivity, with the maximum value of 0.9 T for x = 0. Particle size reduction in Ca1-xYxMnO3 retains the bulk-like magnetic behavior of samples having up to 15% of Y3+, with the small ferromagnetic contribution from disordered surface spins. Suppression of charge ordering state and enhancement of saturation magnetization were found in samples with higher Y3+ concentration (x = 0.2, 0.3), indicating high ferro-magnetic contribution in these samples. [Projekat Ministarstva nauke Republike Srbije, br. III45015]
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