0435362 - FZÚ 2015 RIV US eng J - Journal Article
Kačenka, Michal - Kaman, Ondřej - Jirák, Zdeněk - Maryško, Miroslav - Žvátora, Pavel - Vratislav, S. - Lukeš, I.
Magnetic properties of La_1-xSr_xMnO₃ nanoparticles prepared in a molten salt.
Journal of Applied Physics. Roč. 115, č. 17 (2014), "17B525-1"-"17B525-3". ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA ČR(CZ) GAP108/11/0807
Institutional support: RVO:68378271
Keywords : magnetic properties * molten salt * neutron diffraction
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.183, year: 2014 ; AIS: 0.682, rok: 2014
DOI: https://doi.org/10.1063/1.4867958

Single phase La1-xSrxMnO3 nanoparticles (x=0.18 - 0.37)are prepared by a novel way in molten NaNO2 at 500°C. Their rhombohedral perovskite structure is confirmed by XRD patterns and exact chemical composition is determined by XRF (X-ray fluorescence) spectroscopy. The mean size of the as-prepared crystallites is of about 50 nm, the grains are rather separated and do not form sintering bridges that were typical for products synthesized by sol-gel routes followed by annealing. On the other hand, the synthesized nanoparticles exhibit rather low magnetization and decreased Curie temperature. Their neutron diffraction study indicates a complex magnetic ordering together with anomalously high atomic displacements factors that decreased considerably after annealing the samples at elevated temperature.
Permanent Link: http://hdl.handle.net/11104/0239243