Maxim Likhanov

Lomonosov Moscow State University | MSU · Department of inorganic chemistry

Re 4− x Mn x Ge 7−δ ( x = 0.9–1.5, δ = 0.42–0.44) is a new member of the Nowotny chimney-ladder family of compounds and features an incommensurate composite structure of transition element T (Re and...

Materials (cement stone samples) in the CaO-K2O-SO3-H2O system with the target phase compositions, including syngenite K2Ca(SO4)2·H2O and calcium sulfate dihydrate CaSO4·2H2O, were prepared from powder mixtures of calcium sulfate anhydrite CaSO4, and/or calciolangbeinite K2Ca2(SO4)3, and potassium sulfate K2SO4 via hydration reactions at a water/po...

We report a detailed study of the nature of the RuGa3 in-gap states by means of precision microscopic methods: nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR), and pump-probe spectroscopy. We observe a pronounced splitting of 69Ga nuclear spin-lattice relaxation curves below ∼40 K and between 70 and 145 K, although the correspo...

Re3Ge7 is a unique electronic material showing low-temperature metal–insulator-like phase transition. Furthermore, bulk superconductivity can be induced in Re3Ge7 by hole doping. Here, we present transport properties, temperature-dependent high-resolution powder x-ray diffraction study, and electronic structure of Re3Ge7 in the vicinity of the elec...

We report a detailed study of the nature of the RuGa3 in-gap states by means of precision microscopic methods: nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR), and pump-probe spectroscopy. We observe a pronounced splitting of 69Ga nuclear spin-lattice relaxation curves below ~ 40 K and between 70 and 145 K, although the corresp...

Due to their non-centrosymmetric structure, B20-type compounds have intriguing properties of chiral magnets and are the objects of study of topological spin textures. Among them is a high-pressure phase MnGe, which demonstrates properties of magnetic skyrmions. We report on the synthesis of an Mn1−xRexGe solid solution with the B20 structure, which...

A polycrystalline sample of the Sn20.5□3.5As22I8 clathrate was synthesised by a standard ampoule method from elements. Temperature dependencies of the heat capacity Cp(T) and unit cell parameter a(T) experimentally studied at the temperatures of 2–300 K revealed abnormal behaviour of CP(T) and a(T) dependencies at the lowest (2–30 K) and elevated (...

In the realm of intermetallic compounds, there is a small group of phases that demonstrate the properties of non-metals. These are intermetallics formed by elements from different blocks of the periodic table, viz., transition metals on the one hand and p-block metals (or metalloids) on the other hand. The interaction between transition metal d-orb...

Intermetallic compounds with semiconducting properties are rare, but they give rise to advanced materials for energy conversion and saving applications. Here, we present ReGa2Ge, a new electron-precise narrow-gap intermetallic semiconductor. The compound crystallizes in the IrIn3 structure type (space group P42/mnm, a = 6.5734(3) Å, c = 6.7450(8) Å...

Nowotny chimney ladder (NCL) phases are intermetallic compounds formed by transition metals and metals of groups 13 and 14. This family can be expanded by combining two p-elements from different groups with those transition metals, for which the corresponding binary NCL phases are unknown. In this paper, we present three new compounds in the V-Al-G...

ReGaGe2 is a new member of the family of intermetallic compounds with non-metallic properties. It displays highly localized covalent bonding pattern.. Its electronic structure is governed by mixing of Re...

We report synthesis, crystal and electronic structure, and transport properties of new intermetallic compound ReGa 0.4 Ge 0.6 , which was obtained by two-step ampule method from the elements. ReGa 0.4 Ge 0.6 crystallizes in its own structure type (space group I4/mmm, a = 2.89222(3) Å, c = 15.1663(3) Å, and Z = 4) which can be described as a sequent...

We performed experimental study of thermal properties of Sn18In6As21.5I8 clathrate by measuring temperature dependencies of its heat capacity (2-300K) and thermal expansion (5-300K). By comparing the results with that published previously for Sn-based clathrates Sn24P19.2I8, Sn20Zn4P20.8I8, and Sn17Zn7P22I8 we established that partial replacement o...

Temperature dependencies of heat capacity, CP(T), and cubic unit cell parameter, a(T), were experimentally obtained in the range of 2-300 K for compounds Sn24P19.2I8, Sn20Zn4P20.8I8, and Sn17Zn7P22I8 belonging to a family of type-I clathrates. The experimental data were analyzed in the frames of Debye-Einstein approximation further accounting for t...

Temperature changes of the heat capacity and unit cell parameters of Sn24P19.4Br8 clathrate were experimentally determined in the temperature range of 2 to 300 K. The data obtained were analyzed using Debye–Einstein approximation and taking into account the impact of both disorder in the host matrix and the presence of vacancies in the framework. A...

Crystals of the Fe1-x Ni x Ga3 limited solid solution (x<0.045) have been grown from gallium flux. We have explored the electronic structure as well as magnetic and thermoelectric properties of Fe0.975Ni0.025Ga3 in comparison with Fe0.95Co0.05Ga3, following the rigid band approach and assuming that one Ni atom donates twice the number of electrons...