Publications by authors named "A Yu Belik"
ABO perovskite materials with small cations at the A site, especially with ordered cation arrangements, have attracted a lot of interest because they show unusual physical properties and deviations from general perovskite tendencies. In this work, A-site-ordered quadruple perovskites, RMnNiMnO with R = Nd, Sm, Gd, and Dy, were synthesized by a high-pressure, high-temperature method at about 6 GPa. Annealing at about 1500 K produced samples with additional (partial) B-site ordering of Ni and Mn cations, crystallizing in space group -3.
View Article and Find Full Text PDFSpin reorientation and the interplay of magnetic sublattices in ErCuMnMnO.
Acta Crystallogr B Struct Sci Cryst Eng Mater
December 2024
Article Synopsis
- The study investigates the magnetic properties of ErCuMnMnO using techniques like magnetic susceptibility, specific heat, and neutron powder diffraction, revealing four distinct magnetic phase transitions.
- The complex structure of quadruple perovskites leads to interactions between various magnetic sublattices, which cause spin reorientation transitions due to competing magnetic forces within the manganese sublattice.
- At low temperatures, one Er sublattice becomes magnetically ordered, while the other remains non-magnetic until a final phase transition, highlighting intricate interactions between transition metal and rare-earth sublattices, which poses challenges for understanding the entire RCuMnMnO family.
Cation order, which can be controlled by synthesis conditions and stoichiometry, plays an important role in properties of perovskite materials. Here we show that aliovalent doping by Sb in SmMnMn(MnSb)O quadruple perovskite solid solutions can control cation orders in both A and B sites. Samples with 0.
View Article and Find Full Text PDFAntibiotic resistance is one of the most serious global health threats. Therefore, there is a need to develop antimicrobial agents with new mechanisms of action. Targeting of bacterial cystathionine γ-lyase (bCSE), an enzyme essential for bacterial survival, is a promising approach to overcome antibiotic resistance.
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