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Bulletin of the Russian Academy of Sciences: Physics最新文献

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Relaxation of the Strength Properties of Ultrafine-Grained Copper during Hydrostatic Extrusion 流体静压挤压过程中超细晶铜强度性能的松弛
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S106287382670111X
E. V. Iasharova, A. N. Gangalo, S. V. Vasiliev, E. A. Sviridova
{"title":"Relaxation of the Strength Properties of Ultrafine-Grained Copper during Hydrostatic Extrusion","authors":"E. V. Iasharova,&nbsp;A. N. Gangalo,&nbsp;S. V. Vasiliev,&nbsp;E. A. Sviridova","doi":"10.1134/S106287382670111X","DOIUrl":"10.1134/S106287382670111X","url":null,"abstract":"<p>The influence of the deformation mode of hydrostatic extrusion on the strength properties of ultrafine-grained copper obtained by equal-channel angular pressing was investigated. It was shown that the strength increases monotonically with increasing strain up to <i>e</i> = 0.9. A further increase in strain causes relaxation decrease in strength due to deformation heating and to a decrease in dislocation density.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1334 - 1339"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823040","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
Elastic Relaxation and Hysteresis in Relaxor Piezoceramics Induced by Weak Electric Fields 弱电场致弛豫压电陶瓷的弹性弛豫和迟滞
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701066
M. A. Lugovaya, E. I. Petrova, N. A. Shvetsova, A. N. Rybyanets
{"title":"Elastic Relaxation and Hysteresis in Relaxor Piezoceramics Induced by Weak Electric Fields","authors":"M. A. Lugovaya,&nbsp;E. I. Petrova,&nbsp;N. A. Shvetsova,&nbsp;A. N. Rybyanets","doi":"10.1134/S1062873826701066","DOIUrl":"10.1134/S1062873826701066","url":null,"abstract":"<p>The complex moduli of elasticity of relaxor piezoceramics in the lead zirconate titanate system were studied as a function of the magnitude of weak constant electric fields and time of exposure thereto. The obtained results were discussed within the framework of the mechanism of the interaction of domain boundaries with crystal lattice defects and space charge carriers.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1252 - 1258"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823042","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
Harmonic Analysis of Double Dielectric Hysteresis Loops of Rb2ZnCl4 Crystal in an Incommensurate Phase after Electrical Annealing 非相称相Rb2ZnCl4晶体电退火后双介电迟滞回路的谐波分析
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701030
V. V. Gorbatenko, B. N. Prasolov, N. V. Datsenko
{"title":"Harmonic Analysis of Double Dielectric Hysteresis Loops of Rb2ZnCl4 Crystal in an Incommensurate Phase after Electrical Annealing","authors":"V. V. Gorbatenko,&nbsp;B. N. Prasolov,&nbsp;N. V. Datsenko","doi":"10.1134/S1062873826701030","DOIUrl":"10.1134/S1062873826701030","url":null,"abstract":"<p>The repolarization of the Rb<sub>2</sub>ZnCl<sub>4</sub> crystal in the incommensurate phase near the ferroelectric phase transition is studied using harmonic analysis. A study of the active and reactive contributions to the amplitudes of current density harmonics revealed that electric field annealing does not affect the magnitude of the phase transition induction field, but it leads to a noticeable temporal evolution of the saturation field of double dielectric hysteresis loops.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1232 - 1236"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823073","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
Calculation of Internal Friction in Solids Based on the Marchenko–Misbah Plasticity Model 基于Marchenko-Misbah塑性模型的固体内耗计算
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701297
D. O. Frolov
{"title":"Calculation of Internal Friction in Solids Based on the Marchenko–Misbah Plasticity Model","authors":"D. O. Frolov","doi":"10.1134/S1062873826701297","DOIUrl":"10.1134/S1062873826701297","url":null,"abstract":"<p>An approximate calculation of some inelastic characteristics of isotropic materials (amorphous bodies, polycrystals) is presented. A formula for describing internal friction in terms of continuum mechanics is obtained and the high-temperature background is investigated. The minimum dissipation of mechanical energy and the corresponding oscillation frequency are found. At an early stage of inelastic quasi-static deformation, a formula similar to Hooke’s law was obtained.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1278 - 1283"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823043","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
Technological Approaches to Controlling the Structural and Electrophysical Properties of Ferroelectric Films 控制铁电薄膜结构和电物理性能的技术途径
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S106287382670108X
A. V. Tumarkin, E. N. Sapego, A. R. Karamov, A. Bogdan, O. E. Zaitsev, I. N. Zakasovskii
{"title":"Technological Approaches to Controlling the Structural and Electrophysical Properties of Ferroelectric Films","authors":"A. V. Tumarkin,&nbsp;E. N. Sapego,&nbsp;A. R. Karamov,&nbsp;A. Bogdan,&nbsp;O. E. Zaitsev,&nbsp;I. N. Zakasovskii","doi":"10.1134/S106287382670108X","DOIUrl":"10.1134/S106287382670108X","url":null,"abstract":"<p>Multilayer barium strontium titanate films were synthesized using RF magnetron sputtering. The influence of substrate temperature, working-gas pressure, and discharge conditions on the structure and dielectric properties of the resulting films was studied. Capacitive structures based on the studied films exhibit capacitance changes of up to 5 times under the influence of an external field, with a loss level of no worse than 4% at a frequency of 2 GHz.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1300 - 1308"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823074","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
Critical Current in Oxide Superconductors with Low-Angle Tilt Boundaries and One-Dimensional Twin Boundary Defect 具有低倾角边界和一维双边界缺陷的氧化物超导体的临界电流
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701285
Yu. A. Pomerantsev
{"title":"Critical Current in Oxide Superconductors with Low-Angle Tilt Boundaries and One-Dimensional Twin Boundary Defect","authors":"Yu. A. Pomerantsev","doi":"10.1134/S1062873826701285","DOIUrl":"10.1134/S1062873826701285","url":null,"abstract":"<p>Within the framework of elasticity theory, the elastic energy of a one-dimensional twin defect of the tilt boundary of a high-temperature superconductor formed by alternating 45° dislocations was determined. The dependence of the critical current of a high-temperature superconductor on the angle of inclination of the boundary with a one-dimensional twin defect is in satisfactory agreement with experimental data and suggests the presence of such defects in grain boundaries as vortex pinning centers.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1271 - 1277"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823079","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
Inelasticity of a Porous Ti–18Zr–15Nb Powder Alloy 多孔Ti-18Zr-15Nb粉末合金的非弹性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701108
G. V. Markova, D. V. Permyakova, A. D. Gusev
{"title":"Inelasticity of a Porous Ti–18Zr–15Nb Powder Alloy","authors":"G. V. Markova,&nbsp;D. V. Permyakova,&nbsp;A. D. Gusev","doi":"10.1134/S1062873826701108","DOIUrl":"10.1134/S1062873826701108","url":null,"abstract":"<p>The temperature spectra of internal friction and the resonance frequency of a Ti–18Zr–15Nb powder alloy with different porosity levels have been studied. The inelastic and elastic effects of different natures have been identified. In the samples with porosity exceeding 50%, an asymmetric maximum of internal friction has been detected accompanied by inflections on the temperature dependence of the frequency. A hypothesis regarding the nature of its formation has been proposed. An increase in porosity over 22% results in the elimination of anomalous elastic behavior in the 570–670 K temperature range. The dependence of the background internal friction on porosity has been shown.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1327 - 1333"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823005","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 the Barium Donor Impurity Concentration on the Dielectric Properties of Potassium Sodium Niobate Ceramics 钡给体杂质浓度对铌酸钾钠陶瓷介电性能的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701078
E. V. Barabanova, A. A. Makulin, A. I. Ivanova
{"title":"Effect of the Barium Donor Impurity Concentration on the Dielectric Properties of Potassium Sodium Niobate Ceramics","authors":"E. V. Barabanova,&nbsp;A. A. Makulin,&nbsp;A. I. Ivanova","doi":"10.1134/S1062873826701078","DOIUrl":"10.1134/S1062873826701078","url":null,"abstract":"<p>The effect of the barium donor impurity concentration on the dielectric properties of potassium sodium niobate ceramics was studied. It was found that doping to 1 and 5 mol % does not change the phase transition pattern, but increases the electrical conductivity of the ceramics. It was shown that the temperature dependence of the relaxation frequency of the process caused by the Maxwell–Wagner polarization and described by the linear dispersion of the permittivity obeys the Arrhenius law in the region of structural phase transitions, which is explained by the participation of charged domain boundaries in this relaxation process.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1292 - 1299"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823077","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
Tuning the Porous Microstructure of Sol–Gel-Derived PZT Films 溶胶-凝胶衍生PZT薄膜多孔结构的调整
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701194
V. A. Yakushev, A. S. Vishnevskiy, D. S. Seregin, D. A. Abdullaev, K. A. Vorotilov
{"title":"Tuning the Porous Microstructure of Sol–Gel-Derived PZT Films","authors":"V. A. Yakushev,&nbsp;A. S. Vishnevskiy,&nbsp;D. S. Seregin,&nbsp;D. A. Abdullaev,&nbsp;K. A. Vorotilov","doi":"10.1134/S1062873826701194","DOIUrl":"10.1134/S1062873826701194","url":null,"abstract":"<p>Porous ferroelectric thin films based on lead zirconate titanate (PZT) are of significant interest for a wide range of electronic and piezoelectric applications due to their exceptional properties. Introducing porosity into the ferroelectric matrix can lead to larger perovskite grains, reduced mechanical stress, and increased surface area, which are advantageous for creating functional composite materials where the ferroelectric matrix is infiltrated by another material. A promising method for generating such tailored porous nanostructures is evaporation-induced self-assembly (EISA), a process that relies on surfactants to form a sacrificial template. However, the multicomponent and nonaqueous nature of the PZT precursor solution presents challenges, making theoretical predictions of surfactant integration and its subsequent effects on film porosity highly complex. This study systematically investigates the impact of various surfactants used in the EISA process, including the effects of molecular weight, structural type, and concentration on the final porous architecture of sol–gel-derived PZT thin films. The results show that nonionic surfactants produce minimal pore size and homogeneity, whereas the cationic surfactant cetyltrimethylammonium bromide yields the highest porosity.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1412 - 1416"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823105","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
Electromechanical Hysteresis and Relaxation Processes in Relaxor Piezoceramics under Strong Electric Fields 强电场作用下弛豫压电陶瓷的机电滞回和弛豫过程
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2026-08-27 DOI: 10.1134/S1062873826701200
A. N. Reznichenko, M. A. Lugovaya, E. I. Petrova, D. I. Makaryev, A. N. Rybyanets
{"title":"Electromechanical Hysteresis and Relaxation Processes in Relaxor Piezoceramics under Strong Electric Fields","authors":"A. N. Reznichenko,&nbsp;M. A. Lugovaya,&nbsp;E. I. Petrova,&nbsp;D. I. Makaryev,&nbsp;A. N. Rybyanets","doi":"10.1134/S1062873826701200","DOIUrl":"10.1134/S1062873826701200","url":null,"abstract":"<p>We presented measurements and analysis of electric displacement and mechanical strain hysteresis loops in relaxor lead zirconate titanate (PZT)-based piezoceramics over a frequency range of 0.001–5 Hz. It is shown that the coercive field, remnant electric displacement, saturation displacement, and relative mechanical strain exhibit significant frequency dependence, displaying anomalous behavior at low frequencies.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"90 8","pages":"1417 - 1421"},"PeriodicalIF":0.48,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148823098","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
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