Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第5页

Determination of the Activation Energy of Defects in Ferroelectrics by the Method of Temperature Activation–Relaxation of the Dielectric Permittivity 用介电常数的温度活化-衰减法测定铁电体中缺陷的活化能

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700058

D. V. Kuzenko

{"title":"Determination of the Activation Energy of Defects in Ferroelectrics by the Method of Temperature Activation–Relaxation of the Dielectric Permittivity","authors":"D. V. Kuzenko","doi":"10.1134/S1027451024700058","DOIUrl":"10.1134/S1027451024700058","url":null,"abstract":"The article proposes a method of temperature activation–relaxation of the permittivity for determining the activation energy of defects in ferroelectrics using lead zirconate–titanate Pb(Zr,Ti)O3 samples as an example. This method is based on the analysis of relaxation of the permittivity after thermal annealing and the analysis of the temperature activation of the permittivity of the Pb(Zr,Ti)O3 ferroelectric. The equality of the activation energy corresponding to the process of migration of oxygen vacancies and the thermal energy of the decay of the domain structure was established, which was confirmed by studying the surface of the samples by scanning electron microscopy. When this temperature was reached, the surface of the domain walls was detached from oxygen vacancies, which are pinning centers. This manifested itself in photographs of the microstructure as a change in the ordering of the domains emerging on the surface of the sample, which led to an irreversible decrease in the permittivity of the sample. For the obtained activation energies, the physical process of domain wall motion activation is established, which is determined by their pinning on structural defects (oxygen vacancies). It is assumed that the irreversible decay of the domain structure occurs when the domain walls are displaced by distances exceeding the elementary lattice parameter of the ferroelectric. The proposed method can be part of a comprehensive study that includes electrophysical, microscopic and X-ray diffraction measurements to determine the defective structure of a ferroelectric material.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 3","pages":"530 - 535"},"PeriodicalIF":0.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718873","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

Comprehensive Analysis of Gold Threads as Decor Elements in Medieval Textiles Using Electron and Ion Beams, and Energy-Dispersive X-Ray Analysis 利用电子束、离子束和能量色散 X 射线分析法全面分析中世纪纺织品中作为装饰元素的金线

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700174

E. A. Sozontov, E. A. Greshnikov, I. N. Trun’kin, I. I. Elkina

{"title":"Comprehensive Analysis of Gold Threads as Decor Elements in Medieval Textiles Using Electron and Ion Beams, and Energy-Dispersive X-Ray Analysis","authors":"E. A. Sozontov, E. A. Greshnikov, I. N. Trun’kin, I. I. Elkina","doi":"10.1134/S1027451024700174","DOIUrl":"10.1134/S1027451024700174","url":null,"abstract":"In the present study, we apply and further develop an interdisciplinary approach to investigate textile remnants of a 17th-century shirt discovered during archaeological excavations by the Institute of Archaeology, Russian Academy of Sciences (conducted in February 2021 under the direction of N.I. Savel’ev) in the former Goncharnaya Sloboda (Pottery Settlement area) of Moscow. When examining a fragment of the shirt with preserved decorative elements, we use a set of complementary analytical methods. The conducted research reveals that the shirt was sewn from linen fabric and bordered with woven silk ribbons. The spun golden threads used for embroidering decorative elements on the shirt are produced by twisting a core thread made of silver (with copper and gold additives) ribbon approximately 340 μm wide and 14 μm thick, with a layer of gold 1–1.5 μm thick applied to its surface. A silk thread is used as the core. A reconstruction of the method for manufacturing the metallic braided ribbon is carried out. High-resolution optical images of the spun gold threads are obtained, revealing their structure.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 3","pages":"602 - 607"},"PeriodicalIF":0.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718759","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

Investigation of the Structure of Highly Dispersed NiO–SiO2 Catalyst Features Using X-Ray Analysis of the Atomic Pair Distribution Function 利用原子对分布函数的 X 射线分析研究高度分散的 NiO-SiO2 催化剂特征结构

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700241

M. D. Mikhnenko, S. V. Cherepanova, A. N. Shmakov, M. V. Alekseeva, R. G. Kukushkin, V. A. Yakovlev, V. P. Pakharukova, O. A. Bulavchenko

{"title":"Investigation of the Structure of Highly Dispersed NiO–SiO2 Catalyst Features Using X-Ray Analysis of the Atomic Pair Distribution Function","authors":"M. D. Mikhnenko, S. V. Cherepanova, A. N. Shmakov, M. V. Alekseeva, R. G. Kukushkin, V. A. Yakovlev, V. P. Pakharukova, O. A. Bulavchenko","doi":"10.1134/S1027451024700241","DOIUrl":"10.1134/S1027451024700241","url":null,"abstract":"In this work, NiO and NiO–SiO2 are studied using X-ray diffraction and the method of atomic-pair radial distribution. Using X-ray phase analysis, it is determined that the sizes of NiO particles have a coherent-scattering region of more than 100 nm, while the NiO–SiO2 sample has particle sizes of about 2–3 nm. However, full-profile simulation using the Rietveld method does not allow one to describe the effects observed during diffraction: asymmetry of the peaks, the appearance of an additional shoulder of peak 111 in the region of small angles; therefore, the method of atomic-pair radial distribution is used to analyze the structure. When simulating the experimental curve of the atomic-pair radial distribution, 3 different models are used: pure NiO, a mixture of NiO and Ni2SiO4, as well as a modified NiO model with Si embedded into the crystal lattice. The latter model is created based on the assumption of the incorporation of silicon into the NiO structure, as can be evidenced by the X-ray diffraction data. According to the results of simulation of the curve of the atomic-pair radial distribution, it is the latter model that provides the best description of the observed effects: a significantly increased unit-cell parameter in comparison with the sample without the addition of SiO2, as well as decreased cation–oxygen distances in the structure while the distances between cations are increased.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 3","pages":"641 - 647"},"PeriodicalIF":0.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718766","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 the Constant Magnetic Field on the Density of an Aging Alloy of Beryllium Bronze BrB-2 恒定磁场对铍青铜老化合金 BrB-2 密度的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700289

Yu. V. Osinskaya, S. G. Magamedova, S. R. Makeev

{"title":"Influence of the Constant Magnetic Field on the Density of an Aging Alloy of Beryllium Bronze BrB-2","authors":"Yu. V. Osinskaya, S. G. Magamedova, S. R. Makeev","doi":"10.1134/S1027451024700289","DOIUrl":"10.1134/S1027451024700289","url":null,"abstract":"This paper presents the main experimental results of measuring the density of beryllium bronze BrB-2, aged in the constant magnetic field and in its absence, using the hydrostatic weighing method. The temperature and time dependences of the density of beryllium bronze BrB-2 during the decomposition of a supersaturated solid solution in a constant magnetic field of strength 557.2 kA/m were studied at aging temperatures of 250, 300, 350, and 400°C and aging duration from 0 to 1 h, and a comparative analysis of their behavior with the corresponding microhardness dependences was carried out. The correlation was discovered between the temperature and time dependences of the density and microhardness of beryllium bronze BrB-2. For example, at an aging temperature of 350°C a sharp maximum in the density of the alloy is observed, and similarly at the same point the absolute maximum of microhardness is achieved. In addition, it was found that the application of a constant magnetic field to the aging process under all heat treatment modes always leads to an increase in the density and microhardness of beryllium bronze BrB-2 compared to the density of the alloy aged in its absence. A physical interpretation is given to the observed facts and patterns. In the future, it is planned to find a correlating function between two independently measured characteristics, density and microhardness, which is important for solid state physics and materials science from scientific and practical points of view.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 3","pages":"666 - 670"},"PeriodicalIF":0.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718779","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

Erratum to: Composition of Silicon Alloyed with Gallium and Phosphorus Atoms 勘误：硅与镓和磷原子合金的组成

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024340019

N. F. Zikrillaev, S. V. Koveshnikov, Kh. S. Turekeev, B. K. Ismaylov

引用次数: 0

Evolution of the Nanohardness of Binary Titanium-Based Solutions in the Case of Torsion under High Pressure 二元钛基溶液在高压扭转情况下的纳米硬度演变

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700277

Yu. D. Zavorotnev, G. C. Davdjan, V. N. Varyukhin, A. G. Petrenko, E. Yu. Tomashevskaya, B. B. Straumal

引用次数: 0

Vortex Motion on the Surface of Shallow and Deep Water 浅水和深水表面的涡旋运动

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700368

A. V. Poplevin, A. A. Levchenko, A. M. Likhter, S. V. Filatov, L. P. Mezhov-Deglin

{"title":"Vortex Motion on the Surface of Shallow and Deep Water","authors":"A. V. Poplevin, A. A. Levchenko, A. M. Likhter, S. V. Filatov, L. P. Mezhov-Deglin","doi":"10.1134/S1027451024700368","DOIUrl":"10.1134/S1027451024700368","url":null,"abstract":"The attenuation of vortex motion on the surface of shallow and deep water is investigated. The vortex flow is formed by two mutually perpendicular waves excited by plungers at a frequency of 6 Hz (wavelength λ = 5.6 cm) on the surface of water measuring 70 × 70 cm and depth h. After reaching a stationary state in the vortex system, the wave pumping is switched off and the attenuation of the surface flow is recorded. On the surface of shallow water, λ/2π ≈ h, when the characteristic size of vortices L exceeds the depth of the liquid, L ( gg ) h, the time dependence of the energy of the vortex flow Е(t) is described by an exponential function at all pumping levels while the dependence of enstrophy Ф(t) = Ω2(t) is exponential only in the range of wave vectors 0–0.3 cm–1. On the surface of deep water, λ/2π < h, L ≈ h the dependences Е(t) and Ф(t) are far from exponential in all wavenumber ranges. At high pumping wave amplitudes, the dependences Е(t) and Ф(t) are nonmonotonic, which can be attributed to the influence of volumetric flows.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 3","pages":"717 - 725"},"PeriodicalIF":0.5,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141718784","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

Adiabatic Invariants during Channeling in a Bent Crystal 弯曲晶体通道过程中的绝热不变式

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700411

N. P. Kalashnikov, A. S. Olchak

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Transition Radiation on a Conducting Target Shaped as a Right Dihedral Angle 形如直角二面角的导电目标上的过渡辐射

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700198

V. V. Syshchenko, A. I. Tarnovsky, V. A. Krivtsov

引用次数: 0

Determination of the Ion–Solid Interaction Potential from Experiment and Its Effect on the Profiles of Implanted Particles 通过实验确定离子-固体相互作用势及其对植入粒子轮廓的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2024-07-15 DOI: 10.1134/S1027451024700265

A. N. Zinoviev, P. Yu. Babenko, V. S. Mikhailov, D. S. Tensin

引用次数: 0