Single crystals of a continuous series of MnAs1‐xSbx solid solutions are obtained and their crystal structure and magnetic properties are investigated in the temperature range from 150 to 600 K. It is shown that the crystal structure of MnAs, MnSb, and alloys with a small content of Sb and As, respectively, is characterized by uniaxial diplacements of atoms in the ferromagnetic state. At the temperature of the first order phase transition Tu the displacements in [001], [011], [011] directions become random. A layered magnetic structure with the ordered arrangement of moments in (100) and arbitrary multiples of 60° in the neighbouring layers is proposed. The destruction of the atter to the paramagnetic state occurs with a second order phase transition (at Tc). For single crystals of composition (0.3 ≦ x ≦ 0.8) the static displacements of Mn atoms are disordered, possibly by the structure defects; here the temperature dependence of the magnetization is described by the Brillouin function. From the data obtained a diagram of transformations (phase diagram) for MnAs1‐xSbx single crystals is plotted.

Advanced electro-magnetic machines and systems require new materials with improved properties. Heterogeneous 3D nanomodified soft magnetic materials could be efficiently applied. Multistage technology of iron particle surface nanomodification by sequential oxidation and Si-organic coatings will be reported. The thickness of layers is 0.5-5 nm. Compaction and annealing are the final steps of magnetic parts and components shaping. The soft magnetic composite material shows the features: resistivity is controlled by insulating coating thickness and equals up to ρ =10-4 Ω⋅m for metallic state and ρ =104 Ω⋅m for insulator state, maximum magnetic permeability is μm = 2500 and μm = 300 respectively, induction is up to Bm=2.1 T. These properties of composite soft magnetic material allow applying for transformers, throttles, stator-rotor of high-efficient and powerful electric machines in 10 kHz–1MGz frequency range. For microsystems and microcomponents application, good opportunity to improve their reliability is the use of nanocomposite materials. Electroplating technology of nanocomposite magnetic materials into the ultra-thick micromolds will be presented. Co-deposition of the soft magnetic alloys with inert hard nanoparticles allows obtaining materials with magnetic permeability up to μm=104, magnetic induction of Bs=(0.62–1.3) T. Such LIGA-like technology will be applied in MEMS to produce high reliable devices with advanced physical properties.

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A method has been developed to study the properties of composite SMC materials based on high-purity iron powders, the lowest carbon content materials, for example, ABC100.30 iron powder, have higher values of magnetic parameters and minimal losses. The structure and morphology of the surface of the obtained composite materials were studied. The results of the influence on the properties of SMC materials of various insulating coatings were obtained, and SMC materials with titanium oxide coatings had better characteristics. The influence of the thickness of the oxide coating on the decrease in magnetic permeability of SMC materials was studied. The influence of insulating coatings' thickness on the SMC material's magnetic properties was determined.

This article describes the methods of using composite magnetic soft materials in the railway transport and mechanical engineering. Soil state in two modifications of Fey and Fey are formed in the iron. Also in the text, the main temperature magnetic and non-magnetic properties of materials, and magnetic properties of materials at various different temperatures are highlighted. It has been noted that other material properties change at normal temperature also. In this regard, the study of new magnetic materials based on isolated iron particles is of interest to the theory of magnetism - the study of the mechanism of magnetic exchange through thin insulating layers with the formation of single-phase ferromagnetic ordering in a multiphase crystalline system.