Browsing Zinātniskie raksti (CFI) / Scientific articles by Author "Bakradze, Georgijs"
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Chemical-state analyses of Ni, Zn, and W ions in NiWO4–ZnWO4 solid solutions by X-ray photoelectron spectroscopy
Bakradze, Georgijs; Kalinko, Aleksandrs; Kuzmin, Alexei (Elsevier, 2022)The chemical states of Ni, Zn, and W in microcrystalline NiWO4–ZnWO4 solid solutions were studied by X-ray photoelectron spectroscopy. The recorded spectra of the Ni 2p, Zn 2p, and W 4f photoelectron lines and Ni L2M23M45, ... -
Evidence of nickel ions dimerization in NiWO4 and NiWO4 – ZnWO4 solid solutions probed by EXAFS spectroscopy and reverse Monte Carlo simulation
Bakradze, Georgijs; Kalinko, Aleksandr; Kuzmin, Alexei (Elsevier, 2021)The existence of exchange-coupled Ni ions – the so-called magnetic dimers – in wolframite-type NiWO and ZnNiWO solid solutions with high nickel content was discovered by X-ray absorption spectroscopy combined with reverse ... -
Octahedral Tilting in Homologous Perovskite Series CaMoO3-SrMoO3-BaMoO3 Probed by Temperature-Dependent EXAFS Spectroscopy
Bakradze, Georgijs; Kuzmin, Alexei (MDPI, 2022)Local distortions in perovskites can be induced by cation displacements and/or by the tilting and rotating of cation–anion octahedra. Both phenomena have been subject to intense investigations over many years. However, ... -
On the Heuristic Procedure to Determine Processing Parameters in Additive Manufacturing based on Materials Extrusion
Bakradze, Georgijs; Arājs, Egīls; Gaidukovs, Sergejs; Thakur, Vijay Kumar (MDPI AG, 2020)We present a heuristic procedure for determining key processing parameters (PPs) in materials-extrusion-based additive manufacturing processes. The concept relies on a design-of-experiment approach and consists of eleven ... -
Peculiarities of the local structure in new medium- and high-entropy, low-symmetry tungstates
Bakradze, Georgijs; Welter, Edmund; Kuzmin, Alexei (Elsevier, 2022)New monoclinic (/) tungstates – a medium-entropy tungstate, (MnNiCuZn)WO4, and a high-entropy tungstate, (MnCoNiCuZn)WO4 – were synthesized and characterized. Their phase purity and solid solution nature were confirmed by ... -
X-ray absorption and Raman spectroscopy studies of tungstates solid solutions ZncNi1-cWO4 (c=0.0-1.0)
Bakradze, Georgijs; Kalinko, Aleksandr; Kuzmin, Alexei (AIP Publishing, 2020)The influence of thermal disorder and static distortions on the local structure in microcrystalline solid solutions of tungstates ZncNi1-cWO4 with c = 0.0–1.0 was investigated using temperature-dependent (10–300 K) x-ray ...