Gorobets O.Yu.

Propagation of Spin Wave Through the Anisotropic Boundary of Two Uniaxial Ferromagnets in an External Magnetic Field

This paper represents the investigation of the reflection of bulk spin waves at the interface of two uniaxial ferromagnetic media that propagate at an angle to the interface and their penetration from one ferromagnetic medium to another one. Thereby, the interaction similar to the interaction of two antiferromagnets is taken into account at the boundary interface between two media in an external constant uniform magnetic field. The problem is solved in the formalism of spin density based on equations of Landau–Lifshitz in the absence of dissipation in the system.

Distribution of the Antiferromagnetism Vector for an Isolated Antidot and a System of Remote Antidots in Antiferromagnets

In the paper, an antiferromagnetism vector distribution in an antiferromagnetic film composed of an uniaxial or isotropic two-sublattice antiferromagnet with a set system of circular antidots is investigated. For such a system, the Landau-Lifshitz equation is written and its solution is obtained.

The Electrolyte Movement at Etching and Deposition of Metals Under Inhomogeneous Constant Magnetic Field

This paper considers the features of the electrolyte movement in the surface layer in the processes of etching and deposition of metals at a ferromagnetic electrode in the form of a ball, when it is magnetized in an external inhomogeneous magnetic field of the moderate intensity (∼ 1 kOe). The choice of an electrode in the form of a ball makes it easy to distinguish the effects of magnetic fields from the effects of a different nature due to the equivalence of all points of its surface in the absence of magnetization in this model system.

Ferritine and biomineralization of biogenic magnetic nanoparticles in microorganisms

In this paper, we verify the hypothesis on obligatory participation of ferritin molecules in the biomineralization process of biogenic magnetic nanoparticles assuming that the genetic mechanism of biogenic magnetic nanoparticles is consistent for prokaryotes and eukaryotes. Using comparative genomic methods, we seek to reveal whether all the magnetic bacteria have ferritin genes in their genome. Well known proteins (ferritin and ferritin-like proteins) are compared with compiling magnetotactice bactria genomes using the blastn “BLAST on-line” under standard program parameters.

Biomineralization of Intracellular Biogenic Magnetic Nanoparticles and Their Expected Functions

The purpose of this paper is to analyze the similarity between proteins of MI MTB and organisms genomes of three main kingdoms: bacteria, archea and eukaryotes for revealing the joint genetic basis of biomineralization of intracellular biogenic magnetic nanoparticles (IBMN). In addition, the research objective is to estimate the energy of paramagnetic and efficiently paramagnetic energy of cluster components compared with their thermal motion energy for establishing the physical mechanism of possible influence of nonuniform in a magnetic field of IBMN on cell metabolism.

Electromotive Force at Etching Homogeneous Magnetized Steel Cylinder in the Electrolyte

In this paper, we calculate the electric cell voltage of the physical circuit at etching of ferromagnetic electrode in the form of a cylinder in an electrolyte caused by inhomogeneous distribution of concentration of the paramagnetic corrosion products on the surface of a steel cylinder in an inhomogeneous magnetostatic field. The shape of the electrode was chosen because all points of the cylinder surface are equivalent in this model system in the absence of magnetization and effects of the magnetic field can be easily separated from the effects of a different nature.

Quasi-Equilibrium Heterogeneous States of Electrolyte at Steel Ball Etching in a Magnetic Field

In this paper, research into the formation of interface separating phases (regions) with different magnetic susceptibilities of paramagnetic etching products is carried out in an inhomogeneous magnetic field of a magnetized steel ball at its corrosion. The theoretical model is proposed describing shape, size of this area and distribution of paramagnetic etching product concentration within the region. The characteristic times of formation, existence and destruction of this interface boundary was experimentally identified.

Genetic Regulation and Phenotypic Expression of the Properties of Biogenic Magnetic Nanoparticles in Magnetotactic Bacteria and Human

By employing the bioinformatics methods, we consider the similarity between the genes of magnetosome island of magnetotactic bacteria and human genes for establishing the degree of homology and determination of functional class of proteins. We analyze the most meaningful coincidences between the genes of magnetosome island of bacteria of Magnetospirillum gryphiswaldense and human genes. We uncover the essential smoothing mainly among proteins of functional class.

Self-Organization of Magnetic Nanoparticles When Giving Magnetic Properties to Yeast Saccharomyces Cerevisiae

We develop and conduct the compararative analysis of four evaluation methods of clusters parameters of magnetic nanoparticles. The magnetically-controllable biosorbent based on the S. cerevisiae culture is used as a model object for analyzing the adequacy of these models. Finally, we obtain the evaluation data on the depth of clusters penetration inside the biomembrane, typical sizes of clusters and dispersion of magnetic cluster sizes. Our analysis shows that all four methods can be used for single magnetic clusters.

The Effect of Magnetostatic Fields of Ferromagnetic Substrate on the Nickel Dendrites Electrodeposition

The paper studies the effect of magnetic state of ferromagnetic substrate on the surface morphology of nickel electrodeposit obtained by the method of electrolysis. After conducting the statistical analysis, we can assume that the residual magnetization of substrate-wire significantly influences dimensioning characteristics of the formed dendrite structures at the absence of an external magnetic field at the Ni electrodeposition. The studied magnetic properties of substrate-wire are confirmed by Bitter powder figures.