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Modification of the Implanted Silicon Surface by a Powerful Light Pulse 用强光脉冲改变植入硅表面
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707189
B. F. Farrakhov, Ya. V. Fattakhov, A. L. Stepanov
{"title":"Modification of the Implanted Silicon Surface by a Powerful Light Pulse","authors":"B. F. Farrakhov,&nbsp;Ya. V. Fattakhov,&nbsp;A. L. Stepanov","doi":"10.1134/S1062873824707189","DOIUrl":"10.1134/S1062873824707189","url":null,"abstract":"<p>A study was made of the possibility of modifying the near-surface silicon layer before and after ion implantation, followed by pulsed light annealing, to structure the surface of the substrates to increase the efficiency of their use in solar energy. The results were compared with the data obtained on monocrystalline and implanted germanium.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1122 - 1125"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186519","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
Development of MRI Equipment and Techniques for Studies of Biological and Agricultural Objects 开发用于生物和农业物体研究的核磁共振成像设备和技术
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S106287382470713X
Ya. V. Fattakhov, V. L. Odivanov, A. A. Bayazitov, A. R. Fakhrutdinov, V. A. Shagalov
{"title":"Development of MRI Equipment and Techniques for Studies of Biological and Agricultural Objects","authors":"Ya. V. Fattakhov,&nbsp;V. L. Odivanov,&nbsp;A. A. Bayazitov,&nbsp;A. R. Fakhrutdinov,&nbsp;V. A. Shagalov","doi":"10.1134/S106287382470713X","DOIUrl":"10.1134/S106287382470713X","url":null,"abstract":"<p>The advantages and features of using a medium-field MRI system for studies of various agricultural objects are considered, a series of special sensors for optimizing such studies is developed, new methods of data processing and analysis are described, and some experimental results are presented.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1089 - 1093"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186482","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
Comparing the Efficiency of Generating the Second Harmonic in Aluminum and Germanium Silicate Glasses upon Volumetric Optical Poling 比较铝和硅酸锗玻璃在体积光学极化时产生二次谐波的效率
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707074
L. I. Vostrikova, I. A. Kartashev
{"title":"Comparing the Efficiency of Generating the Second Harmonic in Aluminum and Germanium Silicate Glasses upon Volumetric Optical Poling","authors":"L. I. Vostrikova,&nbsp;I. A. Kartashev","doi":"10.1134/S1062873824707074","DOIUrl":"10.1134/S1062873824707074","url":null,"abstract":"<p>The generation of the second harmonic is investigated on microperiodic nonlinear polarizability gratings photointegrated upon volumetric optical poling in aluminum and germanium silicate glasses. A comparison shows the strong impact of nitrogen, phosphorus, and rare-earth element additions. An original theory of nonlinear-frequency conversion using the current mechanism allows the characteristics and magnitudes of photointegrated nonlinearities in glasses to be estimated. A strong dependence is revealed of the efficiency of harmonic generation on the intensity of the poling radiation component, due to the possible influence of photoconductivity. This dependence must be considered when developing promising samples with photointegrated gratings.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1055 - 1061"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186488","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
Crystal Structure and EPR Spectra of Mn2.25Co0.75BO5 Mn2.25Co0.75BO5 的晶体结构和 EPR 光谱
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707190
R. M. Eremina, E. M. Moshkina, I. V. Yatsyk, V. A. Shustov
{"title":"Crystal Structure and EPR Spectra of Mn2.25Co0.75BO5","authors":"R. M. Eremina,&nbsp;E. M. Moshkina,&nbsp;I. V. Yatsyk,&nbsp;V. A. Shustov","doi":"10.1134/S1062873824707190","DOIUrl":"10.1134/S1062873824707190","url":null,"abstract":"<p>Results are presented from investigating the structure of Mn<sub>2.25</sub>Co<sub>0.75</sub>BO<sub>5</sub> via powder neutron diffraction. Crystals of ludwigite Mn<sub>2.25</sub>Co<sub>0.75</sub>BO<sub>5</sub> are grown by flux method using a Bi<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>-based solvent diluted with Na<sub>2</sub>CO<sub>3</sub> carbonate. Boric acid <span>({text{H}}_{3}^{{11}}{text{B}}{{{text{O}}}_{{text{3}}}})</span> is used as the boron-containing reagent. Powder neutron diffraction measurements are made at a temperature of 100 K on powder prepared by grinding grown single crystals. Rietveld studies show that the grown Mn<sub>2.25</sub>Co<sub>0.75</sub>BO<sub>5</sub> crystals belong to <i>Pbam</i> space group. Crystallographic sites occupied by cobalt and manganese ions are identified by analyzing powder neutron diffractograms. A bottleneck regime is observed in the temperature dependence of the EPR spectra.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1126 - 1130"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186491","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
Viscous Friction of a Ferrofluid in the Coaxial Gap between Cylindrical Walls Being in Uniform Rectilinear Relative Motion 处于匀速直线相对运动中的圆柱壁之间的同轴间隙中铁流体的粘性摩擦力
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707256
A. S. Ivanov, M. A. Koskov, S. A. Somov
{"title":"Viscous Friction of a Ferrofluid in the Coaxial Gap between Cylindrical Walls Being in Uniform Rectilinear Relative Motion","authors":"A. S. Ivanov,&nbsp;M. A. Koskov,&nbsp;S. A. Somov","doi":"10.1134/S1062873824707256","DOIUrl":"10.1134/S1062873824707256","url":null,"abstract":"<p>The viscous friction of a ferrofluid in the coaxial gap between a stationary outer nonmagnetic tube and a uniformly and rectilinearly moving inner cylindrical permanent magnet was investigated experimentally and theoretically. An analytical expression for the effective coefficient of friction was proposed within the framework of the model concepts of the Couette–Poiseuille flow profile with zero flow rate and was confirmed in a laboratory experiment.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1158 - 1165"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186497","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
Ferromagnetic Resonance and the Spin Hall Effect in an Fe3Al/Pt Bilayer Fe3Al/Pt 双层中的铁磁共振和自旋霍尔效应
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707141
A. Kh. Kadikova, B. F. Gabbasov, I. V. Yanilkin, A. I. Gumarov, D. G. Zverev, A. G. Kiiamov, L. R. Tagirov, R. V. Yusupov
{"title":"Ferromagnetic Resonance and the Spin Hall Effect in an Fe3Al/Pt Bilayer","authors":"A. Kh. Kadikova,&nbsp;B. F. Gabbasov,&nbsp;I. V. Yanilkin,&nbsp;A. I. Gumarov,&nbsp;D. G. Zverev,&nbsp;A. G. Kiiamov,&nbsp;L. R. Tagirov,&nbsp;R. V. Yusupov","doi":"10.1134/S1062873824707141","DOIUrl":"10.1134/S1062873824707141","url":null,"abstract":"<p>Results are presented from studying the magnetostatic and magnetoresonant properties of a thin-film bilayer Fe<sub>3</sub>Al/Pt structure synthesized via molecular beam epitaxy. Magnetometry and ferromagnetic resonance data indicate the four-fold in-plane magnetocrystalline anisotropy of the Fe<sub>3</sub>Al layer. The magnetic field dependence of the voltage induced by the inverse spin Hall effect is measured under conditions of spin pumping, and the quantitative characteristic of the spin-charge transformation in platinum (the spin Hall angle) is estimated as θ<sub>SH</sub> = 0.030 ± 0.005.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1094 - 1098"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186485","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
Li3V2(PO4)3-Based Cathode Materials for Li-Ion Batteries: Time Evolution of the Vanadium Valence State 基于 Li3V2(PO4)3 的锂离子电池阴极材料：钒价态的时间演变
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707177
A. R. Yagfarova, I. V. Yatsyk, D. V. Mamedov, Y. A. Deeva, A. M. Uporova, T. I. Chupakhina, S. M. Khantimerov, T. P. Gavrilova
{"title":"Li3V2(PO4)3-Based Cathode Materials for Li-Ion Batteries: Time Evolution of the Vanadium Valence State","authors":"A. R. Yagfarova,&nbsp;I. V. Yatsyk,&nbsp;D. V. Mamedov,&nbsp;Y. A. Deeva,&nbsp;A. M. Uporova,&nbsp;T. I. Chupakhina,&nbsp;S. M. Khantimerov,&nbsp;T. P. Gavrilova","doi":"10.1134/S1062873824707177","DOIUrl":"10.1134/S1062873824707177","url":null,"abstract":"<p>Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>-based composites as a lithium-ion battery cathode material were synthesized by the hydrothermal method with subsequent annealing in an Ar atmosphere. The as-prepared samples were characterized by X-ray diffraction analysis and electron spin resonance (ESR) methods. Based on ESR, data the quantitative estimation of V<sup>4+</sup> content was performed. The tetravalent vanadium ions arised instead of trivalent vanadium ions due to lithium nonstoichiometry in Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> structure. This method of identifying nonstoichiometry via ESR detection of V<sup>4+</sup> ions is very simple and demonstrative and can be used to characterize not only as-prepared samples but also samples after multiple electrochemical cycling. This technique of the lithium nonstoichiometry detection in Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> can be used if the valence state of vanadium ions is stable and investigated samples are not degraded during a long time. To clarify the question, the additional ESR measurements were performed for Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> samples which were air-stored over a long period (up to 2 years). The obtained data proved the sample degradation in the form of increasing in V<sup>4+</sup> content. It was found that in the presence of LiPO<sub>3</sub> salt in the composite the number of magnetic centers increased significantly, so it contributed to sample degradation, while the pure Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> sample Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub>/C were most stable.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1115 - 1121"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186490","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 Color Centers of the Short-Wave Range in Sodium and Lithium Fluorides 氟化钠和氟化锂短波范围的新色彩中心
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707050
N. T. Maksimova, D. D. Miroshnik, A. I. Evdokimova
{"title":"New Color Centers of the Short-Wave Range in Sodium and Lithium Fluorides","authors":"N. T. Maksimova,&nbsp;D. D. Miroshnik,&nbsp;A. I. Evdokimova","doi":"10.1134/S1062873824707050","DOIUrl":"10.1134/S1062873824707050","url":null,"abstract":"<p>The authors investigate the mechanism behind the formation of luminescence centers inside LiF crystals in the short-wave range (400–500 nm). The studied centers are found to be intrinsic crystal lattice defects, created by a radiation–thermal process. The proposed center model is obtained in the NaF lattice. It is established that new centers in sodium fluoride allow short-wave luminescence to be obtained in the yellow-green range.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1046 - 1050"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186489","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 Intrinsic Defects on the Structural and Optical Properties of Borosilicate Glasses Containing Rare-Earth Ions 内在缺陷对含稀土离子硼硅玻璃结构和光学特性的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707025
E. V. Malchukova, V. S. Levitskiy, N. G. Tyurnina, Z. G. Tyurnina
{"title":"Effect of Intrinsic Defects on the Structural and Optical Properties of Borosilicate Glasses Containing Rare-Earth Ions","authors":"E. V. Malchukova,&nbsp;V. S. Levitskiy,&nbsp;N. G. Tyurnina,&nbsp;Z. G. Tyurnina","doi":"10.1134/S1062873824707025","DOIUrl":"10.1134/S1062873824707025","url":null,"abstract":"<p>Results are presented from analyzing the structural and luminescent properties of Ce, Gd co-doped aluminoborosilicate glasses. It is shown that the intensity of luminescence inherent in oxygen-deficiency centers grows along with simultaneously occurring Ce, Gd ions and a nonlinear change in their concentration. This phenomenon correlates with the nonlinear change in glass polymerization and the number of highly symmetrical positions of Gd<sup>3+</sup> ions. The co-doping effect can be explained by the coexistence of different structural positions of co-dopant ions in a alumino-borosilicate glass matrix and their interaction with intrinsic defects observed in it.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1026 - 1033"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186470","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 of a System of High-Spin Ions in Zero Magnetic Field with Microwave Pulses at Finite Temperatures 零磁场中高旋离子系统在有限温度下的磁化与微波脉冲
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-19 DOI: 10.1134/S1062873824707232
M. R. Arifullin, V. L. Berdinskiy
{"title":"Magnetization of a System of High-Spin Ions in Zero Magnetic Field with Microwave Pulses at Finite Temperatures","authors":"M. R. Arifullin,&nbsp;V. L. Berdinskiy","doi":"10.1134/S1062873824707232","DOIUrl":"10.1134/S1062873824707232","url":null,"abstract":"<p>The resonant microwave pulses have been shown to be able to create magnetization of high-spin (<i>S</i> ≥ 1) metal ions even in the absence of an external magnetic field. This transformation of the ion spin states is similar to the “alignment–orientation” transition in atomic spectroscopy. These manipulations make it possible to translate the results of elementary quantum computing operations performed in zero magnetic fields into physically observable quantities.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 7","pages":"1148 - 1152"},"PeriodicalIF":0.48,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186495","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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