Bulletin of the Russian Academy of Sciences: Physics最新文献_第4页

Synthesis and Compositional Transformations in the Epitaxial Bilayer Structure Pd0.9Fe0.1/Pt 外延双层结构Pd0.9Fe0.1/Pt的合成与成分转换

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701510

Zh. Kh. Pulotov, A. I. Gumarov, I. V. Yanilkin, A. G. Kiiamov, L. R. Tagirov, R. V. Yusupov

引用次数: 0

Ab initio Investigation of the Rashba–Dresselhaus Giant Spin Splitting in the Structure of MeH2(bipyridine_CN) (Me = Ru, W, Re, Os, Ir, Pt, Au, Bi) MeH2(bipyridine_CN) （Me = Ru， W, Re, Os, Ir, Pt, Au, Bi）结构中Rashba-Dresselhaus巨自旋分裂的从头算研究

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701443

A. A. Evseev, E. K. Abdrakhimova, I. I. Gumarova, A. I. Shamsieva, O. V. Nedopekin

{"title":"Ab initio Investigation of the Rashba–Dresselhaus Giant Spin Splitting in the Structure of MeH2(bipyridine_CN) (Me = Ru, W, Re, Os, Ir, Pt, Au, Bi)","authors":"A. A. Evseev, E. K. Abdrakhimova, I. I. Gumarova, A. I. Shamsieva, O. V. Nedopekin","doi":"10.1134/S1062873826701443","DOIUrl":"10.1134/S1062873826701443","url":null,"abstract":"Two-dimensional chiral metal-organic frameworks (2D CMOFs) combine a high degree of chirality with the presence of heavy atoms, which ensures strong spin–orbit interactions. These unique structural characteristics and, consequently, their electronic properties make these materials promising for spintronic applications. In this paper, using density functional theory, we investigate the structural and electronic properties of 2D CMOFs based on heavy transition metals (Ru, W, Re, Os, Ir, Pt, Au, and Bi). For the MeH2(bipyridine_CN) (where Me = Os, Ir, Ru) compound, the energy barriers for the transition between structures with different chiralities are calculated, and the band structure is presented, constructed by considering spin–orbit interaction and strong electronic correlations. Calculations of the band structure for Os, as well as for Ir and Ru, confirmed the presence of strong Dresselhaus splitting in the valence band, indicating strong spin–orbit interaction, which occurs due to the presence of the chiral structure and heavy metals.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 9","pages":"1490 - 1499"},"PeriodicalIF":0.48,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of External Axial Magnetic Field on Current–Voltage Characteristics of Diffuse Vacuum Arc 外轴向磁场对扩散真空电弧电流-电压特性的影响

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701534

A. I. Belostotskii, A. D. Melnikov, M. S. Paramonov, R. A. Usmanov, A. V. Gavrikov

{"title":"Effect of External Axial Magnetic Field on Current–Voltage Characteristics of Diffuse Vacuum Arc","authors":"A. I. Belostotskii, A. D. Melnikov, M. S. Paramonov, R. A. Usmanov, A. V. Gavrikov","doi":"10.1134/S1062873826701534","DOIUrl":"10.1134/S1062873826701534","url":null,"abstract":"Diffuse vacuum arc is currently being investigated as a promising plasma source for the plasma separation method of spent nuclear fuel. In this work, current–voltage characteristics (CVC) of diffuse vacuum arcs with thermionic (Gd) and non-thermionic (Cr) cathodes in an external axial magnetic field were investigated. It was found that discharge with a Cr cathode demonstrates a linear CVC with a negative slope. For a thermionic Gd, non-monotonic CVCs were obtained. Moreover, in the set range of parameters (discharge current from 10 to 60 A, cathode temperature 1970 K, external magnetic field 20 mT), two types of CVCs with different voltages were found for the Gd cathode: non-monotonic and with a negative slope. This fact may indicate that various forms of diffuse vacuum arc may exist in the set parameter range. For the non-thermionic chrome, CVC stays linear and shows little dependence on the magnetic field. For the thermionic gadolinium, the effect of the magnetic field is more significant: differential resistance of positive-slope branches of the CVC increases by an order of magnitude with an increase in magnetic field from 0 to 30 mT. The latter fact may indicate the difference in current-transfer mechanisms for discharges with thermionic and non-thermionic cathodes.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 9","pages":"1567 - 1573"},"PeriodicalIF":0.48,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic Properties of Oxidized Ferromagnetic Layers in Co/Pb/Co Superconducting Spin Valves Co/Pb/Co超导自旋阀氧化铁磁层的磁性研究

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701431

A. A. Kamashev, D. A. Arbuzov, N. N. Garif’yanov, A. A. Validov, E. M. Begishev, I. A. Garifullin

引用次数: 0

Spark Discharge Method: Study of the Influence of Thermophysical Parameters of the Electrode Material on Their Erosion 火花放电法：电极材料热物性参数对其腐蚀影响的研究

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701674

A. D. Maksimov, E. I. Azarkevich, I. V. Beketov

{"title":"Spark Discharge Method: Study of the Influence of Thermophysical Parameters of the Electrode Material on Their Erosion","authors":"A. D. Maksimov, E. I. Azarkevich, I. V. Beketov","doi":"10.1134/S1062873826701674","DOIUrl":"10.1134/S1062873826701674","url":null,"abstract":"An experimental study of erosion craters formed during the synthesis of nanoparticles of various metals (Cu, Fe, Ti, Al, Sn) by the spark discharge method, conducted by the authors in previous works, revealed two key findings: first, a significant correlation between crater diameters and their depths, and second, a correlation between crater diameters and the erosive ability of different metals as well as their thermophysical properties. An attempt was made to compare experimental data with erosion resistance criteria proposed by various authors, such as the enthalpy per unit volume of the metal at the melting point (Volchenkova) or the criterion proposed by Palatnik. It was found that copper exhibits anomalous behavior: its median crater diameter and depth are significantly smaller than expected from the general trend. This work attempts to interpret experimental data based on known solutions to certain heat propagation problems, including the problem with a moving phase boundary. A qualitative agreement was established between the calculated depth of the phase boundary and the experimental crater depths, as well as the values of the average current density in the electrode spot. For copper, the calculated melting-through depth substantially exceeds the experimental values.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 9","pages":"1673 - 1679"},"PeriodicalIF":0.48,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plasma Dynamic Synthesis Productivity of Dispersed Iron Oxides in Single-Pulse Operation Mode 分散氧化铁在单脉冲操作模式下的等离子体动态合成效率

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701753

I. I. Shanenkov, A. A. Sivkov, A. I. Tsimmerman, A. Nassyrbayev, D. S. Nikitin, I. S. Zhumabaev, Yu. L. Shanenkova

引用次数: 0

Relationship between Photoluminescence and the Nature of Spin Centers in Nanoporous Aluminum Oxide 纳米多孔氧化铝的光致发光与自旋中心性质的关系

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701418

V. B. Zaitsev, E. V. Kytina, Yu. V. Nazarkina, D. A. Dronova, D. D. Shitova, E. A. Konstantinova

引用次数: 0

Radiation Transfer Modeling in Thermal Plasma: NEC Calculation and Integration into an Arc Discharge Model 热等离子体中的辐射传输建模：NEC计算和集成到电弧放电模型中

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701546

N. V. Obraztsov, Iu. V. Murashov, N. K. Kurakina, S. A. Averyanova, R. I. Zhiligotov

{"title":"Radiation Transfer Modeling in Thermal Plasma: NEC Calculation and Integration into an Arc Discharge Model","authors":"N. V. Obraztsov, Iu. V. Murashov, N. K. Kurakina, S. A. Averyanova, R. I. Zhiligotov","doi":"10.1134/S1062873826701546","DOIUrl":"10.1134/S1062873826701546","url":null,"abstract":"Accurate modeling of radiative heat transfer is essential for predicting the thermal and electromagnetic behavior of arc discharges and for designing high-performance plasma technologies. This study presents a refined approach to evaluating radiation losses in thermal plasma based on high-resolution Net Emission Coefficients (NECs) obtained with a spectral discretization of 0.1 nm over the range of 50–800 nm. Radiation losses are analyzed as a function of the plasma column radius using several specification schemes, including a component-wise cylindrical model, fixed-radius approximations, and interpolation via the modified Akima method. The calculated NECs are integrated directly into a multiphysics digital model of a free-burning arc, enabling a detailed assessment of how different radiation loss models influence the resulting temperature fields, energy transport, and current density distributions. Sensitivity analysis reveals that gas composition, plasma radius specification, and optical property variations exert the strongest impact on simulation outcomes, highlighting the dominant role of radiation in the high-temperature region of the arc. The developed methodology offers a foundation for extending radiation models to additional gas mixtures, operating pressures, and partially nonequilibrium conditions, supporting the advancement of digital twins and next-generation plasma processing technologies.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 9","pages":"1574 - 1583"},"PeriodicalIF":0.48,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Multi-Component Coatings Based on Polymer Derived Ceramics and Aluminum by the Combined Plasma-Enhanced Chemical Vapor Deposition and Physical Vapor Deposition Method 等离子体增强化学气相沉积法和物理气相沉积法合成基于聚合物衍生陶瓷和铝的多组分涂层

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701686

A. I. Menshakov, Yu. A. Menshakova, P. A. Skorynina

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Radiation-Chemical Synthesis of Zinc Oxide Nanopowders and Zinc Oxide–Silver Composites 纳米氧化锌粉体及氧化锌-银复合材料的辐射化学合成

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Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-09-14 DOI: 10.1134/S1062873826701765

S. Y. Sokovnin, V. G. Ilves, M. E. Balezin, K. I. Demidova, O. R. Timoshenkova

{"title":"Radiation-Chemical Synthesis of Zinc Oxide Nanopowders and Zinc Oxide–Silver Composites","authors":"S. Y. Sokovnin, V. G. Ilves, M. E. Balezin, K. I. Demidova, O. R. Timoshenkova","doi":"10.1134/S1062873826701765","DOIUrl":"10.1134/S1062873826701765","url":null,"abstract":"Zinc oxide nanopowders (NPs) possess unique properties and are used in many industries. Moreover, by employing various synthesis and processing methods, it is possible to produce a material that is most suitable for a particular task. In this work the textural, morphological and phase analysis of ZnO NPs as well as their composites produced using a radiation-chemical method were conducted. ZnO NPs was produced using a liquid solution of hexahydrate zinc nitrate in isopropyl alcohol, while ZnO–Ag composite by adding silver nitrate to this solution. ZnO–Zn–Ag composite was produced through the deposition of silver NPs on ZnO–Zn NPs, which were preliminarily synthesized by pulsed electron beam evaporation method. The results shows that the Zn–ZnO–Ag composite is mesoporous with a complex pore size distribution. According to microscopy data the centers of silver ion condensation are small ZnO NPs, the number of which increases during annealing, as indicated by X-ray diffraction data, leading to the formation of a predominantly fine-dispersed fraction.","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 9","pages":"1738 - 1743"},"PeriodicalIF":0.48,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0