Investigation of Magnetic Nanoparticles Fe0.6Co0.4@C by NMR Method

Nanoparticles Fe0.6Co0.4@C were synthesized by the gas-phase method, part of the sample was annealed to increase magnetization. NMR spectra of 59Co were obtained. Analysis of the data obtained showed that after annealing, the spectrum corresponds to an ordered alloy with a BCC lattice.Работа выполнена в рамках проекта РНФ № 21-72-0007

STUDY OF THE INTERNAL STRUCTURE AND MAGNETIC PROPERTIES OF NANOPARTICLES BASED ON FeMe@C (Me=Co,Ni) BINARY ALLOYS BY NMR

FeMe@C (Me=Co,Ni) nanoparticles were synthesized by the gas-phase method, some of them were annealed to increase the magnetization. 59Co, 61Ni and 57Fe NMR spectra were obtained. By annealing, it is possible to obtain a structurally ordered phase of the FeCo alloy in the core of the particles.Работа выполнена в рамках проекта РНФ № 21-72-00007

Field research of total stations

This article presents the results of field research of two total stations (the park of geodetic instruments of the experimentally-technological laboratory of remote sensing and land resources monitoring of the Agrarian Technological Institute of the RUDN University. This article was written based on the research practices which the authors were in the Scientific and Educational Center of the Agrarian Technological Institute of the RUDN University. Electronic total stations, along with the receivers of the Global Navigation Satellite Systems (GNSS) currently is one of the most popular tools for the production of topographic and geodetic works. One of the important requirements of users for these surveying instruments - the accuracy of the measurement, which determines the accuracy of determining the coordinates of the turning points and the land area. The studies were conducted at a specialized reference geodetic network, authorized to carry out such tests, and is a benchmark tool for metrological certification of surveying instruments. For testing were chosen total stations that are most in demand in the production of topographic and cadastral surveys. The studies included a comparative analysis of the length and height of the reference sections of a linear basis, the measured electronic total stations; comparing passport data accuracy performance total station with the actual values obtained from measurements on the reference basis; Comparative analysis of the results of measurements of the lengths of sections and elevations of the reference line basis, with the reference values. The results of field studies have shown that the actual accuracy of the measurements performed by the subjects geodetic instruments generally corresponds to the values indicated in their passport characteristics. This led to the conclusion of the suitability of total stations for precise positioning required for receipt of geospatial data ensuring land surveying and cadastral works. Analysis of the results of geodetic measurements of the reference base segments showed the discrepancy between the increase of the increase of the measured distance. Fixed deterioration of the measurement accuracy in areas where there may be potentially interfere with the precision-guided sighting axis on the reflector

Mechanism of molecule SrF formation in determination of fluoride by electrothermal molecular absorption spectrometry

Методом равновесного термодинамического моделирования изучены термохимические процессы, сопровождающие образование газообразных молекул SrFThermochemical processes accompanying the formation of gaseous molecules Sr