Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.09.56223.136o-23
В. В. Гаврушко, А. С. Ионов, О. Р. Кадриев, В. А. Ласткин
A silicon-based photodetector containing two identical n+-p photodiodes is described. One of the photodiodes had a wide spectral response with high sensitivity in the ultraviolet region. The sensitivity of the second was reduced in the short-wavelength part of the spectrum by creating additional recombination centers in the near-surface region by implanting As ions. The spectral sensitivity of the differential signal obtained by subtracting photocurrents had a pronounced short-wavelength characteristic. The long-wavelength limit of the spectral range in terms of the λ0.5 level, depending on the doping dose, was in the range of 0.37 — 0.47 μm. The sensitivity maximum corresponded to λmax=0.32 — 0.37 μm. The electrical and noise characteristics of the photodetector are given. The possibility of using differential photodetectors as two-color ones is shown.
{"title":"Кремниевые дифференциальные фотоприемники. Технология, характеристики, применение","authors":"В. В. Гаврушко, А. С. Ионов, О. Р. Кадриев, В. А. Ласткин","doi":"10.21883/jtf.2023.09.56223.136o-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.09.56223.136o-23","url":null,"abstract":"A silicon-based photodetector containing two identical n+-p photodiodes is described. One of the photodiodes had a wide spectral response with high sensitivity in the ultraviolet region. The sensitivity of the second was reduced in the short-wavelength part of the spectrum by creating additional recombination centers in the near-surface region by implanting As ions. The spectral sensitivity of the differential signal obtained by subtracting photocurrents had a pronounced short-wavelength characteristic. The long-wavelength limit of the spectral range in terms of the λ0.5 level, depending on the doping dose, was in the range of 0.37 — 0.47 μm. The sensitivity maximum corresponded to λmax=0.32 — 0.37 μm. The electrical and noise characteristics of the photodetector are given. The possibility of using differential photodetectors as two-color ones is shown.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80124440","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55981.32-23
В. Ф. Фатеев, Ф.Р. Смирнов, А. А. Карауш
The article investigates the accuracy of measuring the difference of gravitational potentials and orthometric heights with a quantum level based on a hydrogen quantum clock. To improve the accuracy of time scale comparison, the authors propose to use a high-precision method of absolute navigation based on global navigation satellite systems phase measurements with integer ambiguity resolution. With a measurement accumulation interval of about 5 days and the use of mobile quantum clocks with a daily relative instability of the order of 1·10-15, the proposed method allows to measure the difference in orthometric heights and gravitational potentials with an error of 7.7 m and 75.3 m2/s2, respectively. At the same time, it is still possible to reduce the error when using quantum clocks with higher stability and increasing the measurement accumulation interval.
{"title":"Эксперимент по повышению точности квантового нивелира на основе водородных квантовых часов с использованием фазовых измерений ГЛОНАСС/GPS","authors":"В. Ф. Фатеев, Ф.Р. Смирнов, А. А. Карауш","doi":"10.21883/jtf.2023.08.55981.32-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55981.32-23","url":null,"abstract":"The article investigates the accuracy of measuring the difference of gravitational potentials and orthometric heights with a quantum level based on a hydrogen quantum clock. To improve the accuracy of time scale comparison, the authors propose to use a high-precision method of absolute navigation based on global navigation satellite systems phase measurements with integer ambiguity resolution. With a measurement accumulation interval of about 5 days and the use of mobile quantum clocks with a daily relative instability of the order of 1·10-15, the proposed method allows to measure the difference in orthometric heights and gravitational potentials with an error of 7.7 m and 75.3 m2/s2, respectively. At the same time, it is still possible to reduce the error when using quantum clocks with higher stability and increasing the measurement accumulation interval.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80168447","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55983.61-23
С.Д. Самуйлов, И.П. Шербаков, Ю.Н. Бочаров, С. И. Кривошеев, С.Г. Магазинов
It is shown that the results of dispersion of various materials in the mode of pulsed current action correspond to theoretical estimates of the wavelength of MHD instability. The sizes of the obtained metal grain, including refractory ones, correspond to the modes of exposure, and their microstructure corresponds to the conditions of formation. Modeling in the Comsol Multiphysics environment at a qualitative level revealed the influence of the thickness of the surface layer of the current flow on the dynamics of the formation and separation of liquid metal droplets. It is shown that one of the operating factors that create and increase instabilities is the heterogeneity of the distribution of Lorentz forces in the current supply zone.
{"title":"Магнитогидродинамическая неустойчивость расплавленного импульсным током поверхностного слоя металла","authors":"С.Д. Самуйлов, И.П. Шербаков, Ю.Н. Бочаров, С. И. Кривошеев, С.Г. Магазинов","doi":"10.21883/jtf.2023.08.55983.61-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55983.61-23","url":null,"abstract":"It is shown that the results of dispersion of various materials in the mode of pulsed current action correspond to theoretical estimates of the wavelength of MHD instability. The sizes of the obtained metal grain, including refractory ones, correspond to the modes of exposure, and their microstructure corresponds to the conditions of formation. Modeling in the Comsol Multiphysics environment at a qualitative level revealed the influence of the thickness of the surface layer of the current flow on the dynamics of the formation and separation of liquid metal droplets. It is shown that one of the operating factors that create and increase instabilities is the heterogeneity of the distribution of Lorentz forces in the current supply zone.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84147938","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.07.55738.66-23
Л. И. Горай, В. А. Шаров, Д.В. Мохов, Т.Н. Березовская, К.Ю. Шубина, Е В Пирогов, А.C. Дашков, А Д Буравлев
The effect of the groove profile shape and random roughness of the reflecting facet of five silicon diffraction gratings (1°-4° blaze angle, period 0.4, 1.4, 2, and 4 μm, various coatings) operating in the soft X-ray and extreme ultraviolet radiation ranges on the outflow of the diffraction efficiency from working orders is studied. Diffraction gratings were fabricated by wet etching of Si(111) vicinal wafers and characterized by atomic force microscopy to determine the shape of the groove profile and roughness. The diffraction efficiency of gratings operating in classical and conical diffraction mounts was calculated based on realistic groove profiles by computer simulation using the PCGrateTM code and taking into account the scattering intensity using Nevot-Croce or Debye-Waller corrections or using the Monte Carlo method (rigorously). The effect of the groove profile shape and roughness on the diffraction efficiency of the fabricated Si gratings is shown.
{"title":"Кремниевые решетки с блеском для мягкого рентгеновского и экстремального ультрафиолетового излучения: влияние формы профиля штриха и случайной шероховатости на дифракционную эффективность","authors":"Л. И. Горай, В. А. Шаров, Д.В. Мохов, Т.Н. Березовская, К.Ю. Шубина, Е В Пирогов, А.C. Дашков, А Д Буравлев","doi":"10.21883/jtf.2023.07.55738.66-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.07.55738.66-23","url":null,"abstract":"The effect of the groove profile shape and random roughness of the reflecting facet of five silicon diffraction gratings (1°-4° blaze angle, period 0.4, 1.4, 2, and 4 μm, various coatings) operating in the soft X-ray and extreme ultraviolet radiation ranges on the outflow of the diffraction efficiency from working orders is studied. Diffraction gratings were fabricated by wet etching of Si(111) vicinal wafers and characterized by atomic force microscopy to determine the shape of the groove profile and roughness. The diffraction efficiency of gratings operating in classical and conical diffraction mounts was calculated based on realistic groove profiles by computer simulation using the PCGrateTM code and taking into account the scattering intensity using Nevot-Croce or Debye-Waller corrections or using the Monte Carlo method (rigorously). The effect of the groove profile shape and roughness on the diffraction efficiency of the fabricated Si gratings is shown.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83761124","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.05.55457.291-22
В. В. Дьяченко, А. Б. Алтухов, А. Д. Гурченко, Е. З. Гусаков, Л. А. Есипов, А. Н. Коновалов, С. И. Лашкул, А. Ю. Попов
The paper presents observations of plasma intermediate frequency range wave emission ((200-1000) MHz) performed in ohmic discharge of the FT-2 tokamak. The dependencies of the RF signal amplitude and spectrum on the plasma parameters and on the location of the probes are presented. Two possible explanations for this effect is proposed. One of them is related to the distortion of the electron distribution function due to the strong ripple of the magnetic field in the FT-2 tokamak. Second one is related to the existence of a beam of run-away electrons, the buildup of a fan instability responsible for the generation of synchrotron radiation in the range (10-80) GHz, and a complex chain of nonlinear decay instabilities leading to such a strong decrease in the frequency of the observed oscillations.
{"title":"Колебания в промежуточном диапазоне частот в омическом разряде токамака ФТ-2","authors":"В. В. Дьяченко, А. Б. Алтухов, А. Д. Гурченко, Е. З. Гусаков, Л. А. Есипов, А. Н. Коновалов, С. И. Лашкул, А. Ю. Попов","doi":"10.21883/jtf.2023.05.55457.291-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.05.55457.291-22","url":null,"abstract":"The paper presents observations of plasma intermediate frequency range wave emission ((200-1000) MHz) performed in ohmic discharge of the FT-2 tokamak. The dependencies of the RF signal amplitude and spectrum on the plasma parameters and on the location of the probes are presented. Two possible explanations for this effect is proposed. One of them is related to the distortion of the electron distribution function due to the strong ripple of the magnetic field in the FT-2 tokamak. Second one is related to the existence of a beam of run-away electrons, the buildup of a fan instability responsible for the generation of synchrotron radiation in the range (10-80) GHz, and a complex chain of nonlinear decay instabilities leading to such a strong decrease in the frequency of the observed oscillations.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83478115","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.08.55985.74-23
Fan Zhang, M. Vergnat, В. А. Володин
Amorphous germanium nanoclusters were formed in the GeOx film on quartz as a result of the disproportionation reaction GeOx→(1- )Ge+ GeO2 during furnace annealing. To determine the reaction activation energy, annealing was carried out at temperatures from 400 to 500 oC. The appearance and growth of amorphous germanium nanoclusters were investigated using Raman spectroscopy. It was found that the position of the Raman scattering peak from amorphous germanium varied with the annealing time, which due to the change in the sizes of nanoclusters, i.e., the phonon localization model can be applied not only to germanium nanocrystals, but also to amorphous germanium clusters, in the case of their ultra-small sizes. In addition, it was found that the saturation time for the formation of amorphous germanium nanoclusters depends exponentially on the annealing temperature. The kinetics analysis of the nanocluster’s formation was carried out within the framework of the Johnson–Mehl–Avrami–Kolmogorov model. The activation energy of the disproportionation reaction was obtained for the first time, which amounted to 1.0±0.1 eV.
{"title":"Определение энергии активации реакции диспропорционирования аморфной пленки GeO-=SUB=-x-=/SUB=- на кварцевой подложке с использованием спектроскопии комбинационного рассеяния света","authors":"Fan Zhang, M. Vergnat, В. А. Володин","doi":"10.21883/jtf.2023.08.55985.74-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.08.55985.74-23","url":null,"abstract":"Amorphous germanium nanoclusters were formed in the GeOx film on quartz as a result of the disproportionation reaction GeOx→(1- )Ge+ GeO2 during furnace annealing. To determine the reaction activation energy, annealing was carried out at temperatures from 400 to 500 oC. The appearance and growth of amorphous germanium nanoclusters were investigated using Raman spectroscopy. It was found that the position of the Raman scattering peak from amorphous germanium varied with the annealing time, which due to the change in the sizes of nanoclusters, i.e., the phonon localization model can be applied not only to germanium nanocrystals, but also to amorphous germanium clusters, in the case of their ultra-small sizes. In addition, it was found that the saturation time for the formation of amorphous germanium nanoclusters depends exponentially on the annealing temperature. The kinetics analysis of the nanocluster’s formation was carried out within the framework of the Johnson–Mehl–Avrami–Kolmogorov model. The activation energy of the disproportionation reaction was obtained for the first time, which amounted to 1.0±0.1 eV.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81008061","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.02.54491.142-22
А.А. Воскобоев, Владимир Александрович Кузьменко, В.С. Межевов, А.Р. Саутин
Experiments were continued to study the physical nature of the drift motion of SF6 molecules under the action of radiation from a repetitively pulsed CO2-laser. To explain the physical nature of the effect, such phenomena as a change in the transport cross-section during laser excitation of molecules, the phenomenon of optical tweezers, thermal diffusion are considered. However, the most reasonable physical explanation of the nature of this effect is the fractionation of a gas mixture as a result of gas dynamic diffusion at the front of a cyclically expanding gas (a variant of barodiffusion).
{"title":"Экспериментальное изучение дрейфового движения молекул SF-=SUB=-6-=/SUB=- под действием излучения CO-=SUB=-2-=/SUB=--лазера","authors":"А.А. Воскобоев, Владимир Александрович Кузьменко, В.С. Межевов, А.Р. Саутин","doi":"10.21883/jtf.2023.02.54491.142-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.02.54491.142-22","url":null,"abstract":"Experiments were continued to study the physical nature of the drift motion of SF6 molecules under the action of radiation from a repetitively pulsed CO2-laser. To explain the physical nature of the effect, such phenomena as a change in the transport cross-section during laser excitation of molecules, the phenomenon of optical tweezers, thermal diffusion are considered. However, the most reasonable physical explanation of the nature of this effect is the fractionation of a gas mixture as a result of gas dynamic diffusion at the front of a cyclically expanding gas (a variant of barodiffusion).","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"PP 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84279120","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.07.55770.89-23
А. А. Дедкова, Игорь Васильевич Флоринский, А. К. Чернышев
We studied the use of morphometric variables (maximal curvature, minimal curvature, mean curvature, topographic index, etc.) for study of the surface of X-ray optical elements. We performed calculations on digital elevation models of a spherical concave substrates: primordial and smoothed digital elevation models, before and after technological operations (mechanical lapping, axisymmetric surface shape correction, ion beam figuring). We have demonstrated a visual display of weakly expressed topography inhomogeneities, incl. which are not displayed on the maps of the original digital elevation models. The consideration included the study of both the measured samples and the errors in the formation of the digital elevation model (artifacts from the recording system and from the inhomogeneity of the medium), as well as the features of scale decomposition when using the universal spectral-analytical method.
{"title":"Использование морфометрических величин при изучении рельефа поверхности рентгенооптических элементов","authors":"А. А. Дедкова, Игорь Васильевич Флоринский, А. К. Чернышев","doi":"10.21883/jtf.2023.07.55770.89-23","DOIUrl":"https://doi.org/10.21883/jtf.2023.07.55770.89-23","url":null,"abstract":"We studied the use of morphometric variables (maximal curvature, minimal curvature, mean curvature, topographic index, etc.) for study of the surface of X-ray optical elements. We performed calculations on digital elevation models of a spherical concave substrates: primordial and smoothed digital elevation models, before and after technological operations (mechanical lapping, axisymmetric surface shape correction, ion beam figuring). We have demonstrated a visual display of weakly expressed topography inhomogeneities, incl. which are not displayed on the maps of the original digital elevation models. The consideration included the study of both the measured samples and the errors in the formation of the digital elevation model (artifacts from the recording system and from the inhomogeneity of the medium), as well as the features of scale decomposition when using the universal spectral-analytical method.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86775939","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}
Pub Date : 2023-01-01DOI: 10.21883/jtf.2023.05.55458.273-22
В. Г. Кулеев
The physical reasons for the formation of peaks of that part of the magnetic permeability, which is caused by transitions of only 90-degree domain boundaries µ90(H0) in deformed steel U8 with coarse-plate perlite when the field changes along the back of the hysteresis loop, are considered. It is shown that the orientation relations of the Patch-Pitch between single-crystal ferrite and cementite plates in U8 steel lead to the appearance of a constant angle between the magnetic moments of these plates and, consequently, to the appearance of corresponding local scattering fields. The latter can significantly affect the values of the peak fields of the curve µ90(H0). Theoretical expressions for these fields containing contributions of scattering fields that should be taken into account when determining residual compressive stresses are obtained. It is also shown that to determine the residual stresses, two expressions for peak fields are not enough, and additional experiments are needed, as which it is proposed to use the dependences of the coercive force on elastic tensile stresses. This leads to a complication of the algorithm for determining residual compressive stresses in comparison with the case of low-carbon steels. A method for estimating the values of local scattering fields in the ferrite parts of U8 steel grains with residual compressive stresses is proposed.
{"title":"Влияние остаточных напряжений в стали У8 с грубопластинчатым перлитом на магнитную проницаемость","authors":"В. Г. Кулеев","doi":"10.21883/jtf.2023.05.55458.273-22","DOIUrl":"https://doi.org/10.21883/jtf.2023.05.55458.273-22","url":null,"abstract":"The physical reasons for the formation of peaks of that part of the magnetic permeability, which is caused by transitions of only 90-degree domain boundaries µ90(H0) in deformed steel U8 with coarse-plate perlite when the field changes along the back of the hysteresis loop, are considered. It is shown that the orientation relations of the Patch-Pitch between single-crystal ferrite and cementite plates in U8 steel lead to the appearance of a constant angle between the magnetic moments of these plates and, consequently, to the appearance of corresponding local scattering fields. The latter can significantly affect the values of the peak fields of the curve µ90(H0). Theoretical expressions for these fields containing contributions of scattering fields that should be taken into account when determining residual compressive stresses are obtained. It is also shown that to determine the residual stresses, two expressions for peak fields are not enough, and additional experiments are needed, as which it is proposed to use the dependences of the coercive force on elastic tensile stresses. This leads to a complication of the algorithm for determining residual compressive stresses in comparison with the case of low-carbon steels. A method for estimating the values of local scattering fields in the ferrite parts of U8 steel grains with residual compressive stresses is proposed.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"279 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90786302","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}
Pub Date : 2023-01-01DOI: 10.21883/tp.2023.05.56070.24-23
None Vas’kovskiy V. O., None Feshchenko A. A., None Moskalev M. E., None Lepalovskij V. N., None Kravtsov E. A., None Gorkovenko A. N.
The article presents the results of a systematic study of the crystalline structure, microstructure, and hysteresis properties of (Cr 80 Mn 20 )/Fe bilayers, deposited on buffer coatings of various metals (Cr, Fe, W, Ta). It has been established that depending on the composition of the buffer coating and the thickness of the Cr-Mn layer, the latter develops body-centered cubic structure with either the (110) or (200) texture, or none. It is shown that the Cr-Mn layer is a source of increased coercivity in the adjacent Fe layer and when is in a certain structural state and has a relatively large thickness (100 nm) induces exchange bias in the Fe layer. The regularities obtained are interpreted in terms of the antiferromagnetic ordering of Cr-Mn and its relatively weak magnetic anisotropy Keywords: antiferromagnetics, ferromagnetic, bilayers, thickness, composition, temperature, texture, coercivity, exchange bias.
{"title":"Effect of buffer coatings on the structural state and magnetic properties of (Cr-Mn)/Fe films","authors":"None Vas’kovskiy V. O., None Feshchenko A. A., None Moskalev M. E., None Lepalovskij V. N., None Kravtsov E. A., None Gorkovenko A. N.","doi":"10.21883/tp.2023.05.56070.24-23","DOIUrl":"https://doi.org/10.21883/tp.2023.05.56070.24-23","url":null,"abstract":"The article presents the results of a systematic study of the crystalline structure, microstructure, and hysteresis properties of (Cr 80 Mn 20 )/Fe bilayers, deposited on buffer coatings of various metals (Cr, Fe, W, Ta). It has been established that depending on the composition of the buffer coating and the thickness of the Cr-Mn layer, the latter develops body-centered cubic structure with either the (110) or (200) texture, or none. It is shown that the Cr-Mn layer is a source of increased coercivity in the adjacent Fe layer and when is in a certain structural state and has a relatively large thickness (100 nm) induces exchange bias in the Fe layer. The regularities obtained are interpreted in terms of the antiferromagnetic ordering of Cr-Mn and its relatively weak magnetic anisotropy Keywords: antiferromagnetics, ferromagnetic, bilayers, thickness, composition, temperature, texture, coercivity, exchange bias.","PeriodicalId":24036,"journal":{"name":"Журнал технической физики","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135988745","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}
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