期刊
INORGANIC CHEMISTRY
卷 53, 期 23, 页码 12243-12252出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic500354t
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资金
- National Science Centre [DEC-2012/06/M/ST5/00325]
- Foundation for Polish Science for Young Scientists (FNP)
- Polish Ministry of Science and Higher Education [IP2011 055671]
- National Centre for Research and Development [PBS1/A9/13/2012]
New interesting aspects of the spectroscopic properties, magnetism, and method of synthesis of gadolinium orthovanadates doped with Eu3+ ions are discussed. Gd-1-xEuxVO(4) (x = 0, 0.05, 0.2) bifunctional luminescent materials with complex magnetic properties were synthesized by a microwave-assisted hydrothermal method. Products were formed in situ without previous precipitation. The crystal structures and morphologies of the obtained nanomaterials were analyzed by X-ray diffraction and transmission and scanning electron microscopy. Crystallographic data were analyzed using Rietveld refinement. The products obtained were nanocrystalline with average grain sizes of 70-80 nm. The qualitative and quantitative elemental composition as well as mapping of the nanocrystals was proved using energy-dispersive X-ray spectroscopy. The spectroscopic properties of red-emitting nanophosphors were characterized by their excitation and emission spectra and luminescence decays. Magnetic measurements were performed by means of vibrating sample magnetometry. GdVO4 and Gd0.8Eu0.2VO4 exhibited paramagnetic behavior with a weak influence of antiferromagnetic couplings between rare-earth ions. In the substituted sample, an additional magnetic contribution connected with the population of low-lying excited states of europium was observed.
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