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

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The Design of Tunable Acoustic Metamaterials Using Scattering Theory Methods 利用散射理论方法设计可调谐声学超材料
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S106287382571089X
K. V. Dmitriev, D. V. Smirnykh
{"title":"The Design of Tunable Acoustic Metamaterials Using Scattering Theory Methods","authors":"K. V. Dmitriev,&nbsp;D. V. Smirnykh","doi":"10.1134/S106287382571089X","DOIUrl":"10.1134/S106287382571089X","url":null,"abstract":"<p>A two-step method for designing acoustic metamaterials and calculating wave fields inside them is proposed. The scattering coefficients are calculated in the first step, and the specific design of metamaterial elements is determined in the second. The results of modeling a cloaking insulating shell and a lens with a tunable focus are presented.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"608 - 613"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140178","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
Influence of Temperature on Magnetoelectric Effect in a Structure Containing Langatate 温度对含语言酸盐结构磁电效应的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710773
E. V. Bolotina, D. V. Savelev, A. V. Turutin, I. V. Kubasov, A. A. Temirov, L. Y. Fetisov
{"title":"Influence of Temperature on Magnetoelectric Effect in a Structure Containing Langatate","authors":"E. V. Bolotina,&nbsp;D. V. Savelev,&nbsp;A. V. Turutin,&nbsp;I. V. Kubasov,&nbsp;A. A. Temirov,&nbsp;L. Y. Fetisov","doi":"10.1134/S1062873825710773","DOIUrl":"10.1134/S1062873825710773","url":null,"abstract":"<p>The effect of temperature on the characteristics of the linear magnetoelectric effect was studied in a three-layered composite structure comprising a single crystal of langatate with thin films of an amorphous ferromagnetic alloy deposited on both sides. The measurements were conducted in the temperature range of 220–340 K. It was determined that the magnetoelectric coefficient and the sensitivity to a magnetic field decrease linearly with increasing temperature.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"541 - 544"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140211","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
Hybridization of the Acoustic Tamm States and Defect Modes of a One-Dimensional Phononic Crystal 一维声子晶体声学Tamm态和缺陷模的杂化
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710906
A. S. Zuev, S. Y. Vetrov, D. P. Fedchenko, I. V. Timofeev
{"title":"Hybridization of the Acoustic Tamm States and Defect Modes of a One-Dimensional Phononic Crystal","authors":"A. S. Zuev,&nbsp;S. Y. Vetrov,&nbsp;D. P. Fedchenko,&nbsp;I. V. Timofeev","doi":"10.1134/S1062873825710906","DOIUrl":"10.1134/S1062873825710906","url":null,"abstract":"<p>The spectral properties of a one-dimensional phononic crystal bounded by a reflector in the form of an air layer are studied. A defect in a phononic crystal with a reflector at the edge results in coupling between the detect mode and acoustic Tamm state. This coupling between modes of different natures manifests as the hybridization of modes, and the repulsion of dips in the reflectance spectrum is explained by avoided crossing of the modes.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"614 - 619"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140181","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 Switching Characteristics of a Spin-Valve Structure in an Arbitrarily Directed Magnetic Field 任意方向磁场下自旋阀结构的临界开关特性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710761
Iu. A. Iusipova
{"title":"Critical Switching Characteristics of a Spin-Valve Structure in an Arbitrarily Directed Magnetic Field","authors":"Iu. A. Iusipova","doi":"10.1134/S1062873825710761","DOIUrl":"10.1134/S1062873825710761","url":null,"abstract":"<p>The dependences of the spin-valve critical switching field with planar and perpendicular anisotropy of layers on the anisotropy coefficient and the magnetic-field direction are analytically and numerically obtained. It is established that the smallest critical values of the field and switching time are achieved when the magnetic field deviates from the anisotropy axis by an angle of 45°.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"533 - 540"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140210","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
Features of Acoustic Wave Propagation in Narrow Pipes of Variable Cross-Section, Allowing for Added Mass 考虑附加质量的变截面窄管中声波传播特性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710918
V. A. Gusev, K. O. Komarovskii
{"title":"Features of Acoustic Wave Propagation in Narrow Pipes of Variable Cross-Section, Allowing for Added Mass","authors":"V. A. Gusev,&nbsp;K. O. Komarovskii","doi":"10.1134/S1062873825710918","DOIUrl":"10.1134/S1062873825710918","url":null,"abstract":"<p>The phenomena arising during the propagation of acoustic waves in narrow tubes with variable cross sections are studied. A special law of cross-sectional variation is defined for the tube. The mode of wave tunneling through a gradual narrowing is investigated. The influence of the added mass on the boundaries of the narrowing area of the tube is considered. The frequency dependences of the coefficient of wave transmission over energy are constructed with allowance for the added mass. Features of discribing dissipative effects in tubes are noted.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"620 - 625"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140182","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
Radiation-Induced Changes in the Structure and Magnetic Properties of Barium Hexaferrite 辐射诱导六铁氧体钡结构和磁性能的变化
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710839
E. D. Shipkova, N. S. Perov, R. A. Makaryin, A. Yu. Punda, V. E. Zhivulin, D. A. Vinnik, M. K. Salakhitdinova, E. M. Ibragimova, A. B. Granovskiy
{"title":"Radiation-Induced Changes in the Structure and Magnetic Properties of Barium Hexaferrite","authors":"E. D. Shipkova,&nbsp;N. S. Perov,&nbsp;R. A. Makaryin,&nbsp;A. Yu. Punda,&nbsp;V. E. Zhivulin,&nbsp;D. A. Vinnik,&nbsp;M. K. Salakhitdinova,&nbsp;E. M. Ibragimova,&nbsp;A. B. Granovskiy","doi":"10.1134/S1062873825710839","DOIUrl":"10.1134/S1062873825710839","url":null,"abstract":"<p>The effect of gamma irradiation and electron irradiation on the crystal structure and magnetic properties of barium hexaferrite BaFe<sub>12</sub>O<sub>19</sub> (solid-phase synthesis) was studied. Irradiations caused changes in the ratio of crystalline phases and crystallite sizes, which resulted in changes in the main parameters of the hysteresis loop: coercive force, residual magnetization, saturation magnetization. These characteristics change nonmonotonically with varying dose, especially immediately after irradiation. In particular, the saturation magnetization measured at 300 K after γ-irradiation of the sample with a dose of 2.1 × 10<sup>7</sup> R decreased from the initial value of 52.5 to ∼40.2 emu/g.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"562 - 568"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140187","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 Magnetic Interactions in a Composite with a Mixture of γ-Fe2O3 and CoFe2O4 Nanoparticles γ-Fe2O3和CoFe2O4纳米颗粒复合材料的磁相互作用研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710815
V. G. Kolesnikova, V. D. Salnikov, A. S. Omelyanchik, V. V. Rodionova
{"title":"Study of Magnetic Interactions in a Composite with a Mixture of γ-Fe2O3 and CoFe2O4 Nanoparticles","authors":"V. G. Kolesnikova,&nbsp;V. D. Salnikov,&nbsp;A. S. Omelyanchik,&nbsp;V. V. Rodionova","doi":"10.1134/S1062873825710815","DOIUrl":"10.1134/S1062873825710815","url":null,"abstract":"<p>Magnetic interactions in composites promising for biomedical applications were studied. The composites were based on a piezoactive PVDF matrix filled with various systems of particles: hard magnetic CoFe<sub>2</sub>O<sub>4</sub> nanoparticles, a mixture of soft magnetic γ-Fe<sub>2</sub>O<sub>3</sub> and hard magnetic CoFe<sub>2</sub>O<sub>4</sub> nanoparticles, and a mixture of CoFe<sub>2</sub>O<sub>4</sub> and BaTiO<sub>3</sub> particles. The study was made by the IRM–DCD and FORC methods. It was determined that the presence of a soft magnetic phase in the composite leads to an increase in the magnetic interaction fields from ∼1300 Oe (for composites containing CoFe<sub>2</sub>O<sub>4</sub> particles) to ∼1500 Oe (for composites containing a mixture of hard and soft magnetic nanoparticles) and to the formation of two main magnetic phases in the composite.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"569 - 574"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140188","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
Low-Temperature Luminescence of Poly(diphenylene phthalide) 聚苯二苯酞低温发光研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710250
M. Yu. Ovchinnikov, V. A. Antipin, S. L. Khursan
{"title":"Low-Temperature Luminescence of Poly(diphenylene phthalide)","authors":"M. Yu. Ovchinnikov,&nbsp;V. A. Antipin,&nbsp;S. L. Khursan","doi":"10.1134/S1062873824710250","DOIUrl":"10.1134/S1062873824710250","url":null,"abstract":"<p>The UV irradiation of poly(diphenylene phthalide) results in a set of ion–radical states and their stabilization by a polymer matrix. The authors record the thermally stimulated cryoluminescence (<i>T</i> = 80–150 K) of poly(diphenylene phthalide) caused by the recombination of ion–radical states. It is shown that the kinetics of the decay of poly(diphenylene phthalide)’s cryoluminescence is polychronous.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"431 - 434"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908598","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
New Types of Fractal Images for Use in Art Therapy and Ophthalmology 用于艺术治疗和眼科的新型分形图像
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710316
Ph. A. Tulapin, O. M. Vokhnik, A. M. Zotov, P. V. Korolenko, R. T. Kubanov
{"title":"New Types of Fractal Images for Use in Art Therapy and Ophthalmology","authors":"Ph. A. Tulapin,&nbsp;O. M. Vokhnik,&nbsp;A. M. Zotov,&nbsp;P. V. Korolenko,&nbsp;R. T. Kubanov","doi":"10.1134/S1062873824710316","DOIUrl":"10.1134/S1062873824710316","url":null,"abstract":"<p>New physical approaches to expanding the range of fractal images presented to patients in art therapy and ophthalmology have been developed and justified. They are based on the use of speckle-like light structures with multifractal geometry and the geometry of polynomial attractors.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"462 - 465"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908622","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
Electrical Resistance of Some Types of Homooligonucleotides 几种同聚核苷酸的电阻
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-05 DOI: 10.1134/S1062873824710171
T. I. Sharipov, A. K. Mishra, R. R. Garafutdinov
{"title":"Electrical Resistance of Some Types of Homooligonucleotides","authors":"T. I. Sharipov,&nbsp;A. K. Mishra,&nbsp;R. R. Garafutdinov","doi":"10.1134/S1062873824710171","DOIUrl":"10.1134/S1062873824710171","url":null,"abstract":"<p>We presented the results of a study of the electrical resistance of two types of short single-stranded DNA molecules consisting of only one type of nucleotides, dA or dC, using scanning tunneling microscopy and spectroscopy. It was found that the resistance of dC<sub>12</sub> homooligonucleotides is slightly higher than that of dA<sub>12</sub> homooligonucleotides.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 3","pages":"391 - 395"},"PeriodicalIF":0.48,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908766","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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