I. V. Sharai

Institute of Magnetism of NAS and MES of Ukraine

The samples of leaves and roots of Nicotiana tabacum, the stems and tubers of Solanum tuberosum and the stems of pea Pisum sativum were examined by scanning probe microscopy in atomic force and magnetic force modes after cultivation without and with addition of magnetite nanoparticles in soil. Chains of both biogenic and anthropogenic magnetic nano...

The study concerns dynamics of standing spin waves in arrays of sub-100 nm elliptic synthetic-antiferromagnet (SAF) nanodisks. We performed a detailed ferromagnetic resonance analysis in conjunction with micromagnetic modeling to find out several prominent traits of such systems. One broad line is shown to be the sole resonant response for a SAF of...

The interaction mechanisms between magnetic fields (MFs) and living systems, which remained hidden for more than a hundred years, continue to attract the attention of researchers from various disciplines: physics, biology, medicine, and life sciences. Revealing these mechanisms at the cellular level would allow to understand complex cell systems an...

Cell-cycle progression is regulated by numerous intricate endogenous mechanisms, among which intracellular forces and protein motors are central players. Although it seems unlikely that it is possible to speed up this molecular machinery by applying tiny external forces to the cell, we show that magnetic forcing of magnetosensitive bacteria reduces...

We investigated structural-phase state, magnetic and magnetoresistive properties in as-deposited CoxAg100-x thin film alloys with a thickness of 35 nm as a function of composition (20 ≤ x ≤ 80 at.%). The aim of this work was to obtain a granular thin film alloy CoxAg100-x with the maximum amplitude of the giant magnetoresistance (GMR) and study of...

To improve the functional properties of a ferromagnetic shape memory alloy, a thermomechanical treatment that includes drawing followed by quenching and high-temperature annealing was proposed, as a result of which a nanostructured state is formed. Thermomechanical treatment (TMT) increases the alloy thermoelasticity, although it is accompanied by...

The single-phase nanoscale Sr2FeMoO6-δ powders with various degrees P of superstructural ordering of Fe³⁺⁺and Mo⁵⁺⁺cations are obtained with the use of citrate-gel method at pH = 4, 6, 9 (P = 65% for pH = 4, P = 51% for pH = 6, and P = 20% for pH = 9). The sequence of phase transformations is studied, the temperature ranges of formation and dissolu...

The problem of creation of small size wideband sensitive sensors of magnetic field with a narrow directional diagram and a small coefficient of thermal drift is actual and requires searching for new magnetic materials. We present the results of the development of the flux-gate sensors with the 20 �m magnetic core of amorphous foils of ММ-3Cо and ММ...

Surface properties of nanoscale iron garnet films of different compositions prepared by reactive ion beam sputtering were examined by means of scanning probe microscopy. Atomic force microscope images of the film surfaces are represented for the films of different compositions and deposition times. The article presents the dependences of the roughn...

Elastic hard magnetic materials based resin-bond magnets with the determined space configuration of the magnetic field required for a three-dimensional cell growth which is essential for the tissue engineering have been produced. Technical tests of the samples as well as the theoretical study of the distribution of stray fields produced by ferromag...

For the high-frequency components of spintronics, the high-speed systems to control magnetization of materials in the local microregions are required. Solving this problem, using conventional magnetic systems, is extremely difficult. Short laser pulses are promising to control the spin current in multilayer magnetic films. Laser radiation makes pos...