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Article
Water Mediated Crystallization and Polymorphism of Zinc Phthalocyanine
The crystallization of zinc phthalocyanine (ZnPc) by slow diffusion of water into the solution in 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone (DMPU) resulted in a formation of a series of crystals. The fir...
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Article
Influence of Ion Irradiation on the Structural Parameters of the Superconducting Layer of HTS Composites
The effect of irradiation with Cu+ ions with an energy of E = 6.3 eV on the crystal structure and critical characteristics of high-temperature copper-based superconductors in the regime of radiation defect format...
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Article
Wide-Band EPR Spectroscopy of SrY2O4:Ho3+ Crystal
EPR spectra of impurity Ho3+ ions in oriented SrY2O4 single-crystals are registered at the temperature 4.2 K in the frequency range from 70 to 180 GHz. The results of measurements evidence for the substitution of...
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Article
Magnetic Properties of Terbium–Lithium Tetrafluoride Crystalline Nano- and Micropowders
Terbium tetrafluoride micro- and nanopowders are synthesized. A drop in the Curie temperature of a nanosized sample is observed. The Curie temperature is TC = 2.88(4) K for a microsized sample and TC = 2.78(4) K ...
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Article
Ferromagnetism of Graphite Nanopowders with Cobalt Oxide Impurity and Its Evolution at Moderate Annealing
A study of the influence of a small impurity of cobalt oxide CoO on the magnetic properties of graphite nanopowder is presented in this article. It is shown that such an impurity is responsible for the weak fe...
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Article
Open AccessClassical Density Functional Theory Approach to the Vibrational Properties and Lattice Specific Heat of a Quasi-One-Dimensional Antiferromagnet KFeSe2
We have performed ab initio calculations of vibrational properties of KFeSe2 compound utilizing density functional theory. Total and element specific phonon densities of states have been calculated within a direc...
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Article
On the Ab Initio DFT + U Calculations of the Physical Properties of a Compound with Strong Electron–Electron Correlations by the Case of KFeS2
The magnetic and electronic properties of quasi-one-dimensional iron chalcogenide compound KFeS2 have been calculated within two DFT + U approaches based on the simplified LSDA + U approach and rotationally invar...
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Article
Chiral recognition of N-thiophosphorylated thioureas via nickel(ii) coordination assisted by 4-dimethylaminopyridine
Nickel(ii) complexes were synthesized using chiral N-thiophosphorylated thioureas as the starting compounds and 4-dimethylaminopyridine as a co-ligand. The reaction with racemic thiourea afforded homochiral compl...
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Article
Impact of Impurity Phases and Superstoichiometric Iron on the Critical Temperature of Iron Chalcogenides
The results of transport and magnetic measurements of iron chalcogenide crystals are analyzed taking into account the data of the chemical composition and impurity phases obtained by means of X-ray diffractome...
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Article
Femtosecond Optical and Magneto-Optical Spectroscopy Study of Magnetic and Electronic Inhomogeneities in a Pd0.94Fe0.06 Thin Film
The results of a femtosecond optical and magneto-optical spectroscopy study of a thin epitaxial film of a low-temperature magnetically soft Pd0.94Fe0.06 alloy on a ({dy001})-MgO substrate are reported. The photoi...
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Article
Investigation of the Magnetic Properties of Ludwigites
Single crystals of Cu2AlBO5 and Cu2GaBO5 copper oxyborates are synthesized via solution-melt crystallization and subjected to X-ray diffraction analysis. Parameters of the crystal lattice and the positions of ato...
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Article
The Spectral and Magnetic Properties of Er3+ and Yb3+ Ions in Y2Ti2O7 Crystals with a Pyrochlore Structure
Cubic Y2Ti2O7 single crystals doped with Er3+ or Yb3+ ions have been studied by the methods of electron spin resonance (ESR) and selective laser spectroscopy. ESR spectra exhibit signals from rare-earth ions that...
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Article
DFT and Mössbauer Spectroscopy Study of a FeTe0.5Se0.5 Single Crystal
The iron based superconductor FeSe0.5Te0.5 has been studied applying Mössbauer spectroscopy and ab initio density functional theory calculations of hyperfine parameters of iron nuclei. It has been shown that the ...
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Article
Synthesis and Studies of Palladium-Iron Alloy Thin Film with L10 Ordered Structure
The paper deals with the synthesis of palladium-iron alloy thin film with the ordered L10 structure and presents results of its studies. The evolution of the thin film crystallinity is described at different stag...
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Article
Observation of Persistent Currents in Finely Dispersed Pyrolytic Graphite
The trapped magnetic flux in the finely ground pyrolytic graphite sample annealed at 670 K in air has been observed. Flux trap** occurs on cooling of the sample from room temperature to 10 K in a magnetic fi...
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Article
Coherent X-ray diffraction imaging of nanoengineered polymeric capsules
For the first time, nanoengineered polymeric capsules and their architecture have been studied with coherent X-ray diffraction imaging technique. The use of coherent X-ray diffraction imaging technique allowed...
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Article
Magnetic properties of chain antiferromagnets RbFeSe2, TlFeSe2, and TlFeS2
Single crystals of ternary ion chalcogenides RbFeSe2, TlFeSe2, and TlFeS2 are studied by X-ray diffraction, SQUID magnetometry, and Mössbauer spectroscopy. Common structural units of these chalcogenides are tetra...
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Article
Analysis of Electronic and Structural Properties of Surfaces and Interfaces Based on LaAlO \( _{3} \) and SrTiO \( _{3}\)
Recently, it was established that a two-dimensional electron system can arise at the interface between two oxide insulators LaAlO $$_{3...
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Article
Magnetic properties of (SrFe12O19) x (CaCu3Ti4O12)1–x composites
New composite materials (SrFe12O19) x (CaCu3Ti4O12)1–x (x = 0, 0.05, 1) have been synthesized. Their magnetic properties are studied in the tempe...