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Magnetic Interparticle Interactions and Superparamagnetic Blocking of Powder Systems of Biogenic Ferrihydrite Nanoparticles 生物铁氧体纳米粒子粉末系统的磁性粒子间相互作用和超顺磁性阻塞
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120075
A. A. Krasikov, Yu. V. Knyazev, D. A. Balaev, S. V. Stolyar, V. P. Ladygina, A. D. Balaev, R. S. Iskhakov
{"title":"Magnetic Interparticle Interactions and Superparamagnetic Blocking of Powder Systems of Biogenic Ferrihydrite Nanoparticles","authors":"A. A. Krasikov,&nbsp;Yu. V. Knyazev,&nbsp;D. A. Balaev,&nbsp;S. V. Stolyar,&nbsp;V. P. Ladygina,&nbsp;A. D. Balaev,&nbsp;R. S. Iskhakov","doi":"10.1134/S1063776123120075","DOIUrl":"10.1134/S1063776123120075","url":null,"abstract":"<p>The magnetic-field dependence of the superparamagnetic-blocking temperature <i>T</i><sub>B</sub> of systems of antiferromagnetically ordered ferrihydrite nanoparticles has been investigated and analyzed. We studied two powder systems of nanoparticles: particles of “biogenic” ferrihydrite (with an average size of 2.7 nm), released as a result of vital functions of bacteria and coated with a thin organic shell, and particles of biogenic ferrihydrite subjected to low-temperature annealing, which cause an increase in the average particle size (to 3.8 nm) and burning out of the organic shell. The character of the temperature dependences of magnetization, measured after cooling in a weak field, as well as the shape of the obtained dependences <i>T</i><sub>B</sub>(<i>H</i>), demonstrate peculiar features, indicating the influence of magnetic interparticle interactions. A detailed analysis of the dependences <i>T</i><sub>B</sub>(<i>H</i>) within the random magnetic anisotropy model made it possible to estimate quantitatively the intensity of magnetic particle–particle interactions and determine the magnetic anisotropy constants of individual ferrihydrite particles.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"903 - 913"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Accuracy, Performance, and Transferability of Interparticle Potentials for Al–Cu Alloys: Comparison of Embedded Atom and Deep Machine Learning Models 铝铜合金粒子间电位的准确性、性能和可转移性：嵌入式原子模型与深度机器学习模型的比较
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120208
E. O. Khazieva, N. M. Shchelkatchev, A. O. Tipeev, R. E. Ryltsev
{"title":"Accuracy, Performance, and Transferability of Interparticle Potentials for Al–Cu Alloys: Comparison of Embedded Atom and Deep Machine Learning Models","authors":"E. O. Khazieva,&nbsp;N. M. Shchelkatchev,&nbsp;A. O. Tipeev,&nbsp;R. E. Ryltsev","doi":"10.1134/S1063776123120208","DOIUrl":"10.1134/S1063776123120208","url":null,"abstract":"<p>In several recent years, a significant progress has been made in atomistic simulation of materials, involving the application of machine learning methods to constructing classical interatomic interaction potentials. These potentials are many-body functions with a large number of variable parameters whose values are optimized with the use of energies and forces calculated for various atomic configurations by ab initio methods. In the present paper a machine learning potential is developed on the basis of deep neural networks (DP) for Al–Cu alloys, and the accuracy and performance of this potential is compared with the embedded atom potential. The analysis of the results obtained implies that the DP provides a sufficiently high accuracy of calculation of the structural, thermodynamic, and transport properties of Al–Cu alloys in both solid and liquid states over the entire range of compositions and a wide temperature interval. The accuracy of the embedded atom model (EAM) in calculating the same properties is noticeably lower on the whole. It is demonstrated that the application of the potentials based on neural networks to the simulation on modern graphic processors allows one to reach a computational efficiency on the same order of magnitude as those of the embedded atom calculations, which at least four orders of magnitude higher than the computational efficiency of <i>ab initio</i> calculations. The most important result is that about the possibility of application of DP parameterized with the use of configurations corresponding to melts and perfect crystals to the simulation of structural defects in crystals and interphase surfaces.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"864 - 877"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139590355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetically Induced Flows in Thrombosed Channels with a Ferrofluid Layer 带铁流体层的血栓通道中的磁诱导流动
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120117
A. Yu. Musickhin, A. Yu. Zubarev
{"title":"Magnetically Induced Flows in Thrombosed Channels with a Ferrofluid Layer","authors":"A. Yu. Musickhin,&nbsp;A. Yu. Zubarev","doi":"10.1134/S1063776123120117","DOIUrl":"10.1134/S1063776123120117","url":null,"abstract":"<p>We proposed a theoretical model and a method for its approximate analysis for flows induced by a uniform rotating magnetic field in a channel filled with a nonmagnetic fluid with a ferrofluid layer injected into it. One end of the channel is assumed to be blocked (thrombosed). This study is aimed at the development of the scientific basis of the magnetically induced intensification of drug transport in blocked blood vessels.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"986 - 993"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of the Strain Tensor and the Elastic Stress Fields in a Diamond Plate with a High Bending Curvature Using Local Laue Diffraction Data 利用局部 Laue 衍射数据确定高弯曲曲率金刚石板的应变张量和弹性应力场
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S106377612312004X
R. V. Digurov, V. D. Blank, V. N. Denisov, S. Yu. Martyushov, B. P. Sorokin, S. A. Terent’ev, S. N. Polyakov
{"title":"Determination of the Strain Tensor and the Elastic Stress Fields in a Diamond Plate with a High Bending Curvature Using Local Laue Diffraction Data","authors":"R. V. Digurov,&nbsp;V. D. Blank,&nbsp;V. N. Denisov,&nbsp;S. Yu. Martyushov,&nbsp;B. P. Sorokin,&nbsp;S. A. Terent’ev,&nbsp;S. N. Polyakov","doi":"10.1134/S106377612312004X","DOIUrl":"10.1134/S106377612312004X","url":null,"abstract":"<p>Cylindrically bent diamond single-crystal plates have a great potential for creating energy dispersive spectrometers and focusing crystal monochromators. When they are designed, it is necessary to take into account the significant stresses that appear on bending the plates. The strain tensor and the elastic stress fields in a cylindrically bent single-crystal (110) diamond plate are calculated. The calculations are based on experimental data obtained by local Laue diffraction. The calculation results can be used to design new X-ray optical devices with the ability to control their parameters.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"763 - 771"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quasilinear Simulation of the Development of Weibel Turbulence in Anisotropic Collisionless Plasma 各向异性无碰撞等离子体中魏伯尔湍流发展的准线性模拟
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120099
A. A. Kuznetsov, A. A. Nechaev, M. A. Garasev, Vl. V. Kocharovsky
{"title":"Quasilinear Simulation of the Development of Weibel Turbulence in Anisotropic Collisionless Plasma","authors":"A. A. Kuznetsov,&nbsp;A. A. Nechaev,&nbsp;M. A. Garasev,&nbsp;Vl. V. Kocharovsky","doi":"10.1134/S1063776123120099","DOIUrl":"10.1134/S1063776123120099","url":null,"abstract":"<p>A spectral quasilinear approach to the problem of TEM-Weibel instability in an anisotropic collisionless plasma is developed, which takes into account only the integral nonlinear interaction of modes through the joint variation of the spatially averaged particle velocity distribution induced by these modes. Within this approximation, a closed system of equations is obtained for the one- and two-dimensional evolution of spatial modes (harmonics) of the distribution function of particles and the electromagnetic field under conditions when the plasma anisotropy axis, the wave vector, and the magnetic field of the modes are orthogonal to each other. The numerical solution of this system of equations is compared with the available results of one-dimensional analytical quasilinear theory in the region of its applicability, as well as with the results of two-dimensional simulation by the particle-in-cell method, which also takes into account the direct four-wave interaction of modes. It is established that in the simplest cases of one-dimensional and axially symmetric two-dimensional problems for a bi-Maxwellian plasma, quasilinear phenomena play the leading role at a quite long stage of nonlinear development of turbulence. It is noted that at a later stage of decay of turbulence and in a more general formulation of the problem, in particular, in the presence of an external magnetic field, the direct nonlinear interaction of modes can manifest itself along with quasilinear phenomena. Based on the analysis carried out, the contribution of certain nonlinear effects to the evolution of the spatial spectrum of Weibel turbulence is revealed, and the properties of this turbulence are studied, including the self-similar character and qualitatively different stages of the dynamics of unstable modes.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"966 - 985"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ghost Fiber Optic Endoscopy with Several Single-Pixel Detectors in the Object Arm 在物体臂上安装多个单像素探测器的幽灵光纤内窥镜
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120038
D. A. Balakin, A. V. Belinsky
{"title":"Ghost Fiber Optic Endoscopy with Several Single-Pixel Detectors in the Object Arm","authors":"D. A. Balakin,&nbsp;A. V. Belinsky","doi":"10.1134/S1063776123120038","DOIUrl":"10.1134/S1063776123120038","url":null,"abstract":"<p>We describe a new method for the formation of optical ghost images, in which radiation in the object arm is detected by several detectors. The advantage of the proposed method is demonstrated, which is the smaller number of illumination patterns required for reconstructing the object image as compared to traditional schemes of ghost imaging. We propose variants of algorithms for measurement reduction to the form relevant to the imaging of the object of investigation, which are aimed at improvement of the performance of the computing component of the endoscope. The fiber-optic version of ghost imaging considered here is suitable for investigating hard-to-reach abdomens and organs of human organism, which permit the introduction of a thin fiber-optic bundle, thus extending its applicability as compared to traditional optic endoscopic methods.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"785 - 799"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Heat Capacity of Quantum Hard Sphere Fluid 论量子硬球流体的热容量
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120130
S. M. Stishov
{"title":"On the Heat Capacity of Quantum Hard Sphere Fluid","authors":"S. M. Stishov","doi":"10.1134/S1063776123120130","DOIUrl":"10.1134/S1063776123120130","url":null,"abstract":"<p>The thermodynamic properties of the Boltzmann hard sphere system is discussed. It was found that zero point energy decreases with temperature so slowly that it turned out to be an almost a constant addition to the classical value. In result the heat capacity of the system differs little from the classical value of 3/2 k everywhere except for the narrow region of low temperatures, where heat capacity drops to zero. The predicted linear temperature contribution to the heat capacity like in ideal Fermi gas was clearly detected in the quantum hard sphere system at the lowest temperatures.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"899 - 902"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental Study of a Prototype of a Superconducting Sigma Neuron for Adiabatic Neural Networks 绝热神经网络超导西格玛神经元原型的实验研究
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120191
A. S. Ionin, N. S. Shuravin, L. N. Karelina, A. N. Rossolenko, M. S. Sidel’nikov, S. V. Egorov, V. I. Chichkov, M. V. Chichkov, M. V. Zhdanova, A. E. Shchegolev, V. V. Bol’ginov
{"title":"Experimental Study of a Prototype of a Superconducting Sigma Neuron for Adiabatic Neural Networks","authors":"A. S. Ionin,&nbsp;N. S. Shuravin,&nbsp;L. N. Karelina,&nbsp;A. N. Rossolenko,&nbsp;M. S. Sidel’nikov,&nbsp;S. V. Egorov,&nbsp;V. I. Chichkov,&nbsp;M. V. Chichkov,&nbsp;M. V. Zhdanova,&nbsp;A. E. Shchegolev,&nbsp;V. V. Bol’ginov","doi":"10.1134/S1063776123120191","DOIUrl":"10.1134/S1063776123120191","url":null,"abstract":"<p>The artificial neuron proposed earlier for use in superconducting neural networks is experimentally studied. The fabricated sample is a single-junction interferometer, part of the circuit of which is shunted by an additional inductance, which is also used to generate an output signal. A technological process has been developed and tested to fabricate a neuron in the form of a multilayer thin-film structure over a thick superconducting screen. The transfer function of the fabricated sample, which contains sigmoid and linear components, is experimentally measured. A theoretical model is developed to describe the relation between input and output signals in a practical superconducting neuron. The derived equations are shown to approximate experimental curves at a high level of accuracy. The linear component of the transfer function is shown to be related to the direct transmission of an input signal to a measuring circuit. Possible ways for improving the design of the sigma neuron are considered.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"888 - 898"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computational–Experimental Study of the Liquid Drop Fragmentation Caused by an Air Shock Wave 空气冲击波导致液滴破碎的计算-实验研究
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120014
K. V. Anisiforov, A. B. Georgievskaya, E. V. Levkina, N. V. Nevmerzhitskii, V. A. Raevskii, E. D. Sen’kovskii, E. A. Sotskov
{"title":"Computational–Experimental Study of the Liquid Drop Fragmentation Caused by an Air Shock Wave","authors":"K. V. Anisiforov,&nbsp;A. B. Georgievskaya,&nbsp;E. V. Levkina,&nbsp;N. V. Nevmerzhitskii,&nbsp;V. A. Raevskii,&nbsp;E. D. Sen’kovskii,&nbsp;E. A. Sotskov","doi":"10.1134/S1063776123120014","DOIUrl":"10.1134/S1063776123120014","url":null,"abstract":"<p>The fragmentation of a drop of liquid (water, alcohol, glycerin) under the action of an air shock wave with a pressure of 0.2 and 3.2 atmg is studied experimentally and theoretically. The experiments are carried out using an air shock tube, and the liquid drop diameter is approximately 0.6 and 2 mm. The process is studied using high-speed video recording. Dispersed liquid particles from ≈5 μm in size are detected, liquid particle size distributions are plotted, and the particle velocities are determined. The experimental results are compared with the results of computational–theoretical estimation.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"940 - 955"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reply to the Comment on the Article “On the Time Integral of Electromagnetic Field” (J. Exp. Theor. Phys. 136, 406 (2023)) 对 "论电磁场的时间积分"（J. Exp. Theor.136, 406 (2023))
IF 1 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2024-01-26 DOI: 10.1134/S1063776123120063
R. M. Feshchenko
{"title":"Reply to the Comment on the Article “On the Time Integral of Electromagnetic Field” (J. Exp. Theor. Phys. 136, 406 (2023))","authors":"R. M. Feshchenko","doi":"10.1134/S1063776123120063","DOIUrl":"10.1134/S1063776123120063","url":null,"abstract":"<p>Reply to the comment on the article “On the time integral of electromagnetic field,” J. Exp. Theor. Phys. <b>136</b>, 406 (2023)).</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 6","pages":"783 - 784"},"PeriodicalIF":1.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139579315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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