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

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Using Magnetic Composites to Create Controlled Photon Crystals 利用磁性复合材料制造可控光子晶体
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707918
A. E. Postelga, S. V. Igonin, Yu. A. Agapova
{"title":"Using Magnetic Composites to Create Controlled Photon Crystals","authors":"A. E. Postelga,&nbsp;S. V. Igonin,&nbsp;Yu. A. Agapova","doi":"10.1134/S1062873824707918","DOIUrl":"10.1134/S1062873824707918","url":null,"abstract":"<p>A photonic crystal was created using a magnetic fluid–epoxy resin composite. The amplitude–frequency characteristics of the reflection coefficient of electromagnetic radiation in the microwave range from the resulting structure were experimentally studied. The possibility of using magnetic composites to create controlled photonic crystals was demonstrated.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1585 - 1592"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540786","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
Magnetization Dynamics of a Suspension of Noninteracting Magnetic Particles in the Presence of a Static Uniform Magnetic Field 静态均匀磁场作用下非相互作用磁性粒子悬浮液的磁化动力学
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707876
A. O. Ivanov, I. M. Subbotin
{"title":"Magnetization Dynamics of a Suspension of Noninteracting Magnetic Particles in the Presence of a Static Uniform Magnetic Field","authors":"A. O. Ivanov,&nbsp;I. M. Subbotin","doi":"10.1134/S1062873824707876","DOIUrl":"10.1134/S1062873824707876","url":null,"abstract":"<p>A theoretical study was made of the increase in the magnetization of a suspension of noninteracting magnetic particles with time after switching on an external constant uniform magnetic field. It was found that the characteristic relaxation time of the process is the same at the initial stage and at the final stage of reaching the equilibrium value of the magnetization and has a minimum in the region of intermediate times.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1579 - 1584"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540787","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
Formation and Dynamics of Droplets in a Magnetic Fluid in Microchannels in an Inhomogeneous Magnetic Field of a Ring Magnet 环形磁铁非均相磁场中微通道磁性流体中液滴的形成与动力学
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707888
D. A. Kalyuzhnaya, E. A. Sokolov, G. A. Zhukov, P. A. Ryapolov
{"title":"Formation and Dynamics of Droplets in a Magnetic Fluid in Microchannels in an Inhomogeneous Magnetic Field of a Ring Magnet","authors":"D. A. Kalyuzhnaya,&nbsp;E. A. Sokolov,&nbsp;G. A. Zhukov,&nbsp;P. A. Ryapolov","doi":"10.1134/S1062873824707888","DOIUrl":"10.1134/S1062873824707888","url":null,"abstract":"<p>A study was made of the dynamics of nonmagnetic droplets in magnetic fluids in microchannels with the flow-focusing configuration under the action of an inhomogeneous magnetic field of a ring magnet. Two types of multiphase systems were investigated: nonmagnetic emulsions “oil in water,” “water in oil,” and “water in oil in water,” as well as magnetic oil-in-water emulsions in which the magnetic fluid was used as the continuous phase. Characterization was made of the dependences of the sizes of the generated nonmagnetic inclusions on the flow rate of the continuous magnetic phase and on the displacement of the magnetic field source relative to the dispersed phase supply connector horizontally along the channel axis are obtained.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1604 - 1610"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540791","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
Regularities and Mechanisms of Composition Influence on Magnetic and Nonlinear Electrical Characteristics of La–Sr Manganites with Combined Substitution for Manganese 成分对锰联合取代的 La-Sr 锰矿的磁特性和非线性电特性的规律性影响及其机制
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824708018
V. K. Karpasyuk, A. G. Badelin, I. M. Derzhavin, S. Kh. Estemirova, D. I. Merkulov
{"title":"Regularities and Mechanisms of Composition Influence on Magnetic and Nonlinear Electrical Characteristics of La–Sr Manganites with Combined Substitution for Manganese","authors":"V. K. Karpasyuk,&nbsp;A. G. Badelin,&nbsp;I. M. Derzhavin,&nbsp;S. Kh. Estemirova,&nbsp;D. I. Merkulov","doi":"10.1134/S1062873824708018","DOIUrl":"10.1134/S1062873824708018","url":null,"abstract":"<p>The data are shown on magnetic properties and peculiarities of nonlinear current-voltage characteristics of manganites with substitution of (<span>({text{Fe}}_{{{text{0}}{text{.5}}}}^{{{text{3 + }}}}{text{Sc}}_{{{text{0}}{text{.5}}}}^{{{text{3 + }}}})</span>), (<span>({text{Ni}}_{{0.5}}^{{2 + }}{text{Ge}}_{{0.5}}^{{4 + }})</span>), (<span>({text{Zn}}_{{0.5}}^{{2 + }}{text{Ge}}_{{0.5}}^{{4 + }})</span>), (<span>({text{Mg}}_{{{text{0}}{text{.5}}}}^{{{text{2 + }}}}{text{Ge}}_{{{text{0}}{text{.5}}}}^{{{text{4 + }}}})</span>) ions pairs for manganese in La–Sr system. The samples containing (Fe,Sc), (Ni,Ge) and (Zn,Ge) have S-shaped sections of negative differential resistance, and (Mg,Ge)-substituted manganite exhibits the property of voltage stabilization.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1654 - 1659"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540583","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
Light Absorption and Light Scattering in Magnetic Fluids with Different Aggregation Resistance 不同抗聚集性磁性流体中的光吸收和光散射
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707839
C. V. Yerin, V. I. Vivchar’
{"title":"Light Absorption and Light Scattering in Magnetic Fluids with Different Aggregation Resistance","authors":"C. V. Yerin,&nbsp;V. I. Vivchar’","doi":"10.1134/S1062873824707839","DOIUrl":"10.1134/S1062873824707839","url":null,"abstract":"<p>The optical effects of dichroism, static light scattering, and light attenuation under the action of a magnetic field in magnetic fluids with an average particle size of 6.7 and 13.7 nm were studied. Significant differences were found both in the magnitude of the effects and in their spectral behavior. They can be due to the formation of aggregates in the sample with larger particles, which significantly change the optical properties of the system. The formation of aggregates under the action of the field was confirmed by dynamic light scattering.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1518 - 1523"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540766","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
Study of Electroconvection in Magnetic Fluids by Dynamic Light Scattering 利用动态光散射研究磁性流体中的电对流
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707840
C. V. Yerin, I. V. Eskova
{"title":"Study of Electroconvection in Magnetic Fluids by Dynamic Light Scattering","authors":"C. V. Yerin,&nbsp;I. V. Eskova","doi":"10.1134/S1062873824707840","DOIUrl":"10.1134/S1062873824707840","url":null,"abstract":"<p>Electroconvection in kerosene-based magnetic fluids was experimentally studied using the method of dynamic light scattering. A decrease in the relaxation time of the autocorrelation function was discovered at various voltages and interelectrode distances. Based on experimental data, the dependences of the maximum velocity of chaotic electroconvective flows on the voltage on the electrodes and the distance between them were determined.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1600 - 1603"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540790","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 Number of Grains on the Magnetizationof Multi-Core Particles 晶粒数量对多芯粒子磁化的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707979
S. A. Sokolsky, A. Yu. Solovyova, E. A. Elfimova, A. O. Ivanov
{"title":"Effect of the Number of Grains on the Magnetizationof Multi-Core Particles","authors":"S. A. Sokolsky,&nbsp;A. Yu. Solovyova,&nbsp;E. A. Elfimova,&nbsp;A. O. Ivanov","doi":"10.1134/S1062873824707979","DOIUrl":"10.1134/S1062873824707979","url":null,"abstract":"<p>The authors study the dependence of the static magnetic response of multi-core particles on the number of grains. The magnetization of multi-core particles consisting of grains in the nodes of a cubic lattice is determined via Monte Carlo computer modeling and theoretical calculations. It is established that the magnetization of multi-core particles is sensitive to the number of grains and does not exceed the value predicted within the single-particle Langevin model. The best agreement between the results from theoretical calculations and computer modeling is obtained for multi-core particles consisting of more than 100 grains.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1573 - 1578"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540749","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
Electroconductivity of Silicone-Based Elastomer Filled with Magnetically Hard Particles 填充磁性硬粒子的硅基弹性体的电导率
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707785
A. V. Bakhtiiarov, G. V. Stepanov, D. A. Lobanov, D. A. Semerenko, P. A. Storozhenko
{"title":"Electroconductivity of Silicone-Based Elastomer Filled with Magnetically Hard Particles","authors":"A. V. Bakhtiiarov,&nbsp;G. V. Stepanov,&nbsp;D. A. Lobanov,&nbsp;D. A. Semerenko,&nbsp;P. A. Storozhenko","doi":"10.1134/S1062873824707785","DOIUrl":"10.1134/S1062873824707785","url":null,"abstract":"<p>Silicone-based elastomer containing Nd–Fe–B-alloy particles garnished with a small portion of nickel grains has been studied for the capability to conduct alternating current. The observations suggest that the presence of nickel expands the variation range of the conductivity and magnetocapacitance in external magnetic fields. In addition, the composite demonstrates the memory of primary magnetizing manifesting itself as certain specific features of the hysteresis loops depending on the polarity of the external magnetic field.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1535 - 1542"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540762","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
Heat Transfer and the Formation of Vapor Bubbles When Boiling a Magnetic Fluid on a Single Center of Vapor Formation in an Alternating Magnetic Field 在交变磁场中沸腾磁性流体时单个蒸汽形成中心的传热和蒸汽气泡的形成
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707931
A. Ya. Simonovsky, A. R. Zakinyan
{"title":"Heat Transfer and the Formation of Vapor Bubbles When Boiling a Magnetic Fluid on a Single Center of Vapor Formation in an Alternating Magnetic Field","authors":"A. Ya. Simonovsky,&nbsp;A. R. Zakinyan","doi":"10.1134/S1062873824707931","DOIUrl":"10.1134/S1062873824707931","url":null,"abstract":"<p>The frequency of vapor bubble formation and heat transfer when boiling a magnetic fluid in a homogeneous alternating horizontal magnetic field are studied experimentally. Bubbles form on a single center of vapor formation. The induction current in the coil through which the vapor bubbles move is used to measure the frequency of vapor bubble formation. It is found that the specific heat flux and the frequency of vapor bubble formation depend strongly on the frequency of the magnetic field. Results testify to the possibility of effective non-contact control over the boiling of a magnetic fluid, which could have practical applications.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1618 - 1622"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540788","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
Study of the Dynamics of Model Magnetic Dispersed Media under Magnetic Influence 磁性分散介质模型在磁场影响下的动力学研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-10-29 DOI: 10.1134/S1062873824707803
E. V. Bondar’, E. V. Shel’deshova, I. A. Shabanova, P. A. Ryapolov
{"title":"Study of the Dynamics of Model Magnetic Dispersed Media under Magnetic Influence","authors":"E. V. Bondar’,&nbsp;E. V. Shel’deshova,&nbsp;I. A. Shabanova,&nbsp;P. A. Ryapolov","doi":"10.1134/S1062873824707803","DOIUrl":"10.1134/S1062873824707803","url":null,"abstract":"<p>A model medium of micrometer-sized magnetite particles and metal balls with a diameter of 1 mm in a viscous medium (glycerol) was studied. The processes of organization of this system in an increasing external magnetic field were considered. The effect of shear vibrations on the processes of structure formation in the systems under study was also examined. The data obtained can serve as a basis for modeling the dynamics of disperse systems and expanding the understanding of their behavior and organization in magnetic fields and under mechanical influences.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 10","pages":"1648 - 1653"},"PeriodicalIF":0.48,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540792","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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