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- Title
Microcrystalline Gd<sub>2</sub>MoO<sub>6</sub> prepared by combined mechanochemical/thermal process and its magnetic properties.
- Authors
Tóthová, Erika; Tarasenko, Róbert; Tkáč, Vladimír; Orendáč, Martin; Hegedüs, Michal; Danková, Zuzana; Holub, Marián; Baláž, Matej; Matik, Marek
- Abstract
Gadolinium oxymolybdate, Gd2MoO6 (monoclinic, C2/c) was prepared via nonconventional mechanochemical/thermal process from powdered oxide precursors (Gd2O3 and (NH4)2MoO4). The effect of mechanical activation via high-energy ball milling on the reactivity of the stoichiometric Gd2O3 + (NH4)2MoO4 mixture was studied by thermal analysis (TG-DSC) and Fourier-transform infrared spectroscopy. While thermal treatment of nonactivated mixture leads only to decomposition of (NH4)2MoO4 and formation of Gd2O3-MoO3 system, mechanical activation provides enough energy for a chemical reaction between both reactants. The product with an average crystallite size of approximately 1 μm shows a well-faceted morphology. The investigation of magnetic properties revealed antiferromagnetic coupling, which is attributed to exchange interactions.
- Subjects
GADOLINIUM compounds; MICROCRYSTALLINE polymers; MECHANICAL chemistry; STOICHIOMETRY; ANTIFERROMAGNETISM
- Publication
Journal of Materials Science, 2019, Vol 54, Issue 8, p6111
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-019-03331-z