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

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The Possibility of a Solitary Electromagnetic Wave Propagating in Arbitrary Directions in the Plane of a Two-Dimensional Graphene-Based Superlattice 二维石墨烯基超晶格平面上孤电磁波任意方向传播的可能性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710888
S. Yu. Glazov, N. E. Mescheryakova, I. N. Fedulov
{"title":"The Possibility of a Solitary Electromagnetic Wave Propagating in Arbitrary Directions in the Plane of a Two-Dimensional Graphene-Based Superlattice","authors":"S. Yu. Glazov,&nbsp;N. E. Mescheryakova,&nbsp;I. N. Fedulov","doi":"10.1134/S1062873825710888","DOIUrl":"10.1134/S1062873825710888","url":null,"abstract":"<p>The possibility of a plane solitary electromagnetic wave propagating in the plane of a square two-dimensional graphene-based superlattice at different angles to its axes is investigated. A nonlinear equation describing the vector potential of a solitary electromagnetic wave is obtained for a case of weak nonadditivity of the energy spectrum of carriers in a collisionless approximation. It is shown that plane solitary waves can propagate either along the superlattice axes or at an angle of 45° to them.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"603 - 607"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140184","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-Frequency Raman Spectroscopy of Human Hair Keratins 人类头发角蛋白的低频拉曼光谱
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710827
E. I. Travkina, A. Yu. Chikishev, N. N. Brandt
{"title":"Low-Frequency Raman Spectroscopy of Human Hair Keratins","authors":"E. I. Travkina,&nbsp;A. Yu. Chikishev,&nbsp;N. N. Brandt","doi":"10.1134/S1062873825710827","DOIUrl":"10.1134/S1062873825710827","url":null,"abstract":"<p>Low-frequency Raman bands characterizing vibrations of elements of the secondary structure of fibrillar proteins (keratins) are identified. Experiments with unpigmented human hair are performed in two configurations: with excitation radiation focused coaxially on the hair and perpendicular to it. Based on the sensitivity of polarization, the bands at 150 and 221 cm<sup>−1</sup> are attributed to vibrations of the α-helical structures of keratins. The spectral interval of 270–340 cm<sup>−1</sup> is attributed to vibrations of β-structures.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"586 - 589"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140206","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
Algorithm for the Spatial-Spectral Correction of Data Captured by a Multispectral Camera 多光谱相机捕获数据的空间光谱校正算法
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710852
A. A. Zolotukhina, A. S. Machikhin, A. V. Guryleva, G. V. Nesterov, V. V. Tedeeva
{"title":"Algorithm for the Spatial-Spectral Correction of Data Captured by a Multispectral Camera","authors":"A. A. Zolotukhina,&nbsp;A. S. Machikhin,&nbsp;A. V. Guryleva,&nbsp;G. V. Nesterov,&nbsp;V. V. Tedeeva","doi":"10.1134/S1062873825710852","DOIUrl":"10.1134/S1062873825710852","url":null,"abstract":"<p>Imaging spectrometers allow non-contact and high-performance assessments of the distribution of an object’s physical and chemical properties, the effectiveness of which depends on the accuracy of data obtained by the device. The authors propose a way of correcting spatial-spectral distortions in images captured by an imaging spectrometer, based on dividing the optical aperture.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"590 - 594"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140209","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
Magnetoelectric Response of a Polymer Composite Filled with a Mixture of CoFe2O4 and BaTiO3 Particles CoFe2O4和BaTiO3粒子混合填充聚合物复合材料的磁电响应
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710803
A. A. Ignatov, O. V. Stolbov, Yu. L. Raikher, V. V. Rodionova
{"title":"Magnetoelectric Response of a Polymer Composite Filled with a Mixture of CoFe2O4 and BaTiO3 Particles","authors":"A. A. Ignatov,&nbsp;O. V. Stolbov,&nbsp;Yu. L. Raikher,&nbsp;V. V. Rodionova","doi":"10.1134/S1062873825710803","DOIUrl":"10.1134/S1062873825710803","url":null,"abstract":"<p>The magnetoelectric response was studied in a composite material based on a rubber-like polymer filled with submicrometer-sized cobalt ferrite and barium titanate particles. The dependence of the magnetoelectric response of a representative volume of such a composite on the system parameters was studied using a computer experiment. Based on the results of the computer experiment, methods for enhancing the magnetoelectric response of such composites were proposed.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"556 - 561"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140186","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
Magnetism of R–Co (R = Gd, Tb) Films with a High Concentration of Rare Earth Elements 稀土元素含量高的R - co （R = Gd, Tb）薄膜的磁性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S106287382571075X
V. O. Vas’kovskiy, E. V. Kudyukov, A. N. Gorkovenko, A. N. Nizaev, A. V. Svalov, M. A. Semkin, V. N. Lepalovskij
{"title":"Magnetism of R–Co (R = Gd, Tb) Films with a High Concentration of Rare Earth Elements","authors":"V. O. Vas’kovskiy,&nbsp;E. V. Kudyukov,&nbsp;A. N. Gorkovenko,&nbsp;A. N. Nizaev,&nbsp;A. V. Svalov,&nbsp;M. A. Semkin,&nbsp;V. N. Lepalovskij","doi":"10.1134/S106287382571075X","DOIUrl":"10.1134/S106287382571075X","url":null,"abstract":"<p>We studied magnetic properties of R–Co (R = Gd, Tb) films containing up to 50 at % of cobalt. The X-ray diffraction characteristics of samples, temperature dependences of magnetization for films of different compositions, concentration dependences of Curie temperature and hysteresis properties are presented. The interpretation of the established patterns is given.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"527 - 532"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140185","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
The Effect of an Al2O3 Layer on the Structural and Temperature-Dependent Magnetic Characteristics of Thin Cobalt Films Al2O3层对钴薄膜结构和温度相关磁特性的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710700
A. V. Kobyakov, G. S. Patrin, V. I. Yushkov
{"title":"The Effect of an Al2O3 Layer on the Structural and Temperature-Dependent Magnetic Characteristics of Thin Cobalt Films","authors":"A. V. Kobyakov,&nbsp;G. S. Patrin,&nbsp;V. I. Yushkov","doi":"10.1134/S1062873825710700","DOIUrl":"10.1134/S1062873825710700","url":null,"abstract":"<p>The cobalt films deposited using the magnetron method on an amorphous Al<sub>2</sub>O<sub>3</sub> layer have been studied. The morphological and magnetic features determined by the formation of a naturally oxidized antiferromagnetic film on cobalt and the Al<sub>2</sub>O<sub>3</sub>/Co interface have been studied. A change in the sign of the exchange bias at temperatures below 200 K has been detected when the cobalt layer thickness on the Al<sub>2</sub>O<sub>3</sub> film is more than 10 nm.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"500 - 506"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140219","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
Thickness Dependences of the Coercivity of Three-Layer Magnetic Films Obtained via Chemical Deposition 化学沉积三层磁膜矫顽力的厚度依赖性
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710712
A. V. Chzhan, V. A. Orlov, Zh. M. Moroz
{"title":"Thickness Dependences of the Coercivity of Three-Layer Magnetic Films Obtained via Chemical Deposition","authors":"A. V. Chzhan,&nbsp;V. A. Orlov,&nbsp;Zh. M. Moroz","doi":"10.1134/S1062873825710712","DOIUrl":"10.1134/S1062873825710712","url":null,"abstract":"<p>Results are presented from studying the coercivity of three-layer magnetic films obtained via chemical deposition. Features of its changes from the thickness of the forming layers were determined. They are associated with the specificity of the magnetization reversal of the studied system, caused by a small difference between the values of the coercivity of the magnetic layers. The demagnetizing field energy is calculated and used to obtain an expression for the critical field of reversing the magnetization of the film. It describes the experimentally observed linear dependence of coercivity on the thickness of the magnetic layers.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"507 - 510"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140220","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
Enhancing the Magnetoelectric Response in a Composite Based on Polyvinylidene Fluoride and a Cobalt Ferrite Suspension through the Dispersion of Particles 聚偏氟乙烯-钴铁氧体悬浮液复合材料磁电响应的分散研究
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710840
P. A. Vorontsov, V. D. Salnikov, V. V. Savin, V. G. Kolesnikova, P. A. Ershov, V. V. Rodionova
{"title":"Enhancing the Magnetoelectric Response in a Composite Based on Polyvinylidene Fluoride and a Cobalt Ferrite Suspension through the Dispersion of Particles","authors":"P. A. Vorontsov,&nbsp;V. D. Salnikov,&nbsp;V. V. Savin,&nbsp;V. G. Kolesnikova,&nbsp;P. A. Ershov,&nbsp;V. V. Rodionova","doi":"10.1134/S1062873825710840","DOIUrl":"10.1134/S1062873825710840","url":null,"abstract":"<p>Results are presented from studying a nanocomposite made of polyvinylidene fluoride and cobalt ferrite nanoparticles coated with oleic acid. It is established that the nanocomposite has low porosity and a highly dispersed distribution of nanoparticles in the polymer matrix. An effect of 24.5 mV/(cm Oe), which is strong for a polymer-based magnetoelectric composite, is observed inside it. This makes the considered material promising for use in biomedical applications as a scaffold for cell stimulation.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"575 - 579"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140204","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 Spectra and Assessing the Quality of a High-Power Laser Diode upon Entering the Operating Mode 大功率激光二极管进入工作模式后的辐射光谱和质量评估
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710876
V. V. Bliznyuk, V. A. Parshin, A. G. Rzhanov, O. I. Semenova, A. E. Tarasov, N. A. Khlyntsev
{"title":"Radiation Spectra and Assessing the Quality of a High-Power Laser Diode upon Entering the Operating Mode","authors":"V. V. Bliznyuk,&nbsp;V. A. Parshin,&nbsp;A. G. Rzhanov,&nbsp;O. I. Semenova,&nbsp;A. E. Tarasov,&nbsp;N. A. Khlyntsev","doi":"10.1134/S1062873825710876","DOIUrl":"10.1134/S1062873825710876","url":null,"abstract":"<p>The authors propose a way of assessing the quality of the heterostructure of a high-power 200 mW laser diode based on measuring spectra of radiation intensity in the over-the-threshold mode of generation. The procedure is based on fixing and analyzing groups of generation modes related to spatial radiation channels. The spectra are measured at different pumping currents lower than the standard for short (no more than 30 min) time intervals.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"599 - 602"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140213","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 Dynamics in a Nickel Films with Toothed Stripe Structure under the Impact of Acoustic Pulses 声脉冲作用下齿状条纹结构镍膜的磁动力学
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-05-26 DOI: 10.1134/S1062873825710748
A. V. Golov, L. N. Kotov, Ch. Nayak
{"title":"Magnetic Dynamics in a Nickel Films with Toothed Stripe Structure under the Impact of Acoustic Pulses","authors":"A. V. Golov,&nbsp;L. N. Kotov,&nbsp;Ch. Nayak","doi":"10.1134/S1062873825710748","DOIUrl":"10.1134/S1062873825710748","url":null,"abstract":"<p>The authors study conditions for the magnetization reorientation of nickel nanofilms with a toothed stripe structure when acoustic pulses of Gaussian shape pass through them. The behavior of such films in a constant magnetic field is studied and hysteresis loops are constructed, depending on the angle of the field’s application. Modeling is done using the MuMax3 software package. Results can be used in developing advanced compact and energy-efficient magnetic recording devices.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 4","pages":"522 - 526"},"PeriodicalIF":0.48,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140215","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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