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172 results on '"Babushkin, A. N."'

18. Effect of Magnetic Impurities on the Physical Properties of Cd3As2-Based Composites in Wide Temperature and Pressure Ranges.

Author

Saypulaeva, L. A., Alibekov, A. G., Melnikova, N. V., Babushkin, A. N., Tebenkov, A. V., Zakhvalinskii, V. S., Ril', A. I., Marenkin, S. F., and Gadzhialiev, M. M.

Abstract

The results of experimental studies of the resistivity, Hall effect, and magnetoresistance of Cd3As2 + kMnAs composites (k = 20, 30, 44.7 mol %) in a toroid-type high-pressure chamber, which makes it possible to create a hydrostatic pressure up to 9 GPa at room temperature in magnetic fields up to 5 kOe, are presented. With increasing pressure, the electrical resistance of samples with different manganese contents is shown to increase at different rates. In the pressure range 4.2–4.4 GPa, a reversible structural transition is observed. An increase in pressure suppresses the positive component of the magnetoresistance; at pressures of P ≈ 1.0 and P ≈ 2.6 GPa, a region of negative magnetoresistance is observed. With a further increase in pressure, the magnetoresistance increases nonmonotonically up to Р ≈ 4.3 GPa, i.e., the phase transition region. [ABSTRACT FROM AUTHOR]

Published
2023
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23. Development of Al2O3 and PLA ceramic-polymer filament for 3D printing by fused deposition modelling method.

Author

Smirnov, Anton, Podrabinnik, Pavel A., Babushkin, Nikolay N., Kuznetsova, Ekaterina V., Pristinskiy, Yuri O., and Khmyrov, Roman S.

Subjects
FUSED deposition modeling, THREE-dimensional printing, POLYLACTIC acid, ALUMINUM oxide, FIBERS, DISTILLED water
Abstract

The authors discuss the process of ceramic-polymer filament obtaining based on aluminum oxide (Al2O3) and polylactide (PLA) for its use in 3D printing technology by fused deposition modeling method (FDM). They consider ceramic polymer compositions with the following component ratio: 30% PLA and 70% Al2O3; 40% PLA and 60% Al2O3; 50% PLA and 50% Al2O3. The compositions were obtained by the colloidal method on a ball mill in distilled water, followed by drying in a vacuum oven and sieving. The microstructure and elemental composition of the mixtures have been studied. The modes of extrusion of the obtained ceramic-polymer compositions are selected. The most advantageous composition of a ceramic-polymer mixture of 40% PLA and 60% Al2O3 has been determined for further use in creating three-dimensional objects by FDM. Experimental samples of products from the produced ceramic-polymer filament were printed. [ABSTRACT FROM AUTHOR]

Published
2022
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35. Thermoelectric Properties of Cd3As2 + n mol % MnAs (n = 10, 20, 30, 44.7) at High Pressures.

Author

Saypulaeva, L. A., Alibekov, A. G., Melnikova, N. V., Sukhanova, G. V., Tebenkov, A. V., Babushkin, A. N., Gadzhialiev, M. M., Zakhvalinskii, V. S., Ril, A. I., and Marenkin, S. F.

Abstract

The results of studying the thermal emf of composites Cd3As2 + n mol % MnAs (n = 10, 20, 30, 44.7) at high pressures up to 50 GPa are presented. In the pressure ranges of P = 28–35 GPa (n = 10, 20), 20–35 GPa (n = 30), and 30–35 GPa (n = 44.7), all the materials studied exhibit specific features in the behavior of the thermal emf S(P) (extrema, inflection points on the curves or hysteresis). At a pressure exceeding 40 GPa, the thermal emf changes weakly or barely changes with an increase and a subsequent decrease in pressure. [ABSTRACT FROM AUTHOR]

Published
2022
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45. Magnetization of Cd3As2–30 mol % MnAs Composite at High Pressure.

Author

Saypulaeva, L. A., Arslanov, T. R., Alibekov, A. G., Khizriev, K. Sh., Melnikova, N. V., Gadzhialiev, M. M., Tebenkov, A. V., Babushkin, A. N., Zakhvalinskii, V. S., Ril', A. I., and Marenkin, S. F.

Subjects
MAGNETIZATION, FERROMAGNETIC materials, HYSTERESIS
Abstract

In this article, we report research data for the isothermal magnetization of a composite consisting of Cd3As2 Dirac semimetal and MnAs ferromagnet (30 mol %) at pressures up to 5 GPa. A magnetic transformation in MnAs inclusions, the size of which presumably varies from a micro- to nanoscale, has been found to be similar to that in bulk MnAs compound, except for a hysteresis in the range of magnetostructural transformation. Under hydrostatic pressure, a magnetization maximum has been revealed at pressures P ≥ 0.77 GPa, which is indicative of ferromagnetic ordering improvement. The conclusion has been drawn that that the above features are due to the superparamagnetic nature of nanometer-sized MnAs inclusions in the Cd3As2 matrix. [ABSTRACT FROM AUTHOR]

Published
2022
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50. Сравнительный анализ деятельности центров коллективного пользования в области современного материаловедения : магистерская диссертация

Author

Бабушкин, А. Н., Babushkin, A. N., УрФУ. Институт естественных наук, Кафедра физики низких температур, Чернова, А. А., Chernova, A. A., Бабушкин, А. Н., Babushkin, A. N., УрФУ. Институт естественных наук, Кафедра физики низких температур, Чернова, А. А., and Chernova, A. A.

Abstract

Currently, the development of science and technology is a very acute issue in Russia. All the scientific potential of Russia gradually flows down abroad with the ideas, developments and scientific staff. State and entrepreneurs create special platforms which are adapted to the modern scientific trends to perform research activities. Such organizations are beginning to exist independently and produce some results of their activities. It is known that any organization needs to assessment and analysis of the efficiency of their work - need to understand positive results. Only in this case, the organization has the right to exist as an effectively operating enterprise. Objective of the work: to compare the centers of collective use for identify indicators of the major parameters of the effectiveness of the CCU, which can be recommended and included in the development plan of less efficient CCU., В настоящее время в России очень остро стоит вопрос развития науки и технологий. Весь научный потенциал России плавно стекается за рубеж вместе с идеями, разработками и научными сотрудниками. Государством и предпринимателями создаются специальные платформы, которые адаптированы к современным научным течениям, для осуществления научной деятельности. Данные организации начинают самостоятельно существовать и выдавать некие результаты деятельности. Как известно, любая организация нуждается в оценке или анализе эффективности своей работы – необходимо осознание положительного результата деятельности. Только в этом случае, организация имеет право на существование в качестве эффективно-действующего предприятия. Цель работы: провести сравнительный анализ центров коллективного пользования для выявления показателей основных параметров эффективности деятельности ЦКП, которые могут быть рекомендованы и включены в план развития менее эффективных ЦКП.

Published
2015

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