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Нестационарная фотоэдс в периодически поляризованном кристалле MgO : LiNbO-=SUB=-3-=/SUB=-
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.02.54291.519
М.А. Брюшинин, В. В. Куликов, И.А. Соколов, Е. Н. Савченков, Н. И. Буримов, С. М. Шандаров, А. Р. Ахматханов, М.А. Чувакова, В. Я. Шур
{"title":"Нестационарная фотоэдс в периодически поляризованном кристалле MgO : LiNbO-=SUB=-3-=/SUB=-","authors":"М.А. Брюшинин, В. В. Куликов, И.А. Соколов, Е. Н. Савченков, Н. И. Буримов, С. М. Шандаров, А. Р. Ахматханов, М.А. Чувакова, В. Я. Шур","doi":"10.21883/ftt.2023.02.54291.519","DOIUrl":"https://doi.org/10.21883/ftt.2023.02.54291.519","url":null,"abstract":"The diffusion mode of the non-steady-state photo-EMF excitation is investigated in periodically poled MgO:LiNbO₃ crystal at light wavelength λ=457 nm. The signal excitation is carried out along the polar axis of the crystal; the dependencies of the signal amplitude versus the phase modulation frequency, intensity and spatial frequency of the interference pattern are studied in this geometry. The analysis of these dependencies allows determining the photoelectric parameters of the material – the type, value and relaxation time of the photoconductivity, as well as the diffusion length of charge carriers.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"57 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77564528","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
Прецессионная динамика намагниченности одноосной наночастицы в области ферромагнитного резонанса 铁磁共振区域单轴纳米微粒磁化动力学
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.06.55664.56
А. М. Шутый, Т.М. Василевская, Дмитрий Игоревич Семенцов, С. В. Елисеева
{"title":"Прецессионная динамика намагниченности одноосной наночастицы в области ферромагнитного резонанса","authors":"А. М. Шутый, Т.М. Василевская, Дмитрий Игоревич Семенцов, С. В. Елисеева","doi":"10.21883/ftt.2023.06.55664.56","DOIUrl":"https://doi.org/10.21883/ftt.2023.06.55664.56","url":null,"abstract":"The influence of the shape parameter (oblateness) of a uniaxial ellipsoidal nanoparticle on the dynamics of its magnetic moment upon magnetization along the symmetry axis and excitation by a weak transverse high-frequency field in the region of parameters where the equilibrium magnetic moment of the nanoparticle and the external static field is noncollinear has been studied. It is shown that as the oblateness increases, the irregularity of the oscillations increases, which at first affects only their amplitude, but then also the time dependence. The intervals of the shape parameter (or frequency), where various nonlinear modes of precession are realized - dynamic bistability, complex spatial attractors and chaos, were revealed using bifurcation diagrams.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87542814","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
Проявление обменного взаимодействия электронов, разделенных потенциальным барьером в двойных квантовых ямах, в эффекте Керра 电子在双量子坑中被潜在屏障隔开的交换作用表现为克尔效应。
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.01.53927.478
М.М. Дегоев, Михаил Михайлович Афанасьев, В.К. Калевич, К. В. Кавокин, Н. В. Козырев, G. Karczewski, Юрий Георгиевич Кусраев
{"title":"Проявление обменного взаимодействия электронов, разделенных потенциальным барьером в двойных квантовых ямах, в эффекте Керра","authors":"М.М. Дегоев, Михаил Михайлович Афанасьев, В.К. Калевич, К. В. Кавокин, Н. В. Козырев, G. Karczewski, Юрий Георгиевич Кусраев","doi":"10.21883/ftt.2023.01.53927.478","DOIUrl":"https://doi.org/10.21883/ftt.2023.01.53927.478","url":null,"abstract":"In tunnel-coupled quantum wells of different widths, it was found that the spin dynamics arising from resonant pulsed optical pumping of an exciton in the narrow well includes the dynamics of electron spin polarization in the wide well, although the electron level in the wide well is 55 meV lower than the electron level in the narrow well. An analysis of the obtained results showed that the observed effect is caused by the exchange interaction of spin-polarized electrons in the wide well with exciton states in the narrow well.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74986241","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
Процессы переключения в керамике твердых растворов на основе Ca-=SUB=-0.3-=/SUB=-Ba-=SUB=-0.7-=/SUB=-Nb-=SUB=-2-=/SUB=-O-=SUB=-6-=/SUB=- 卡-= -= - 3-= - SUB - 7-= -2- 2-= -2- O-= -6-= - SUB -= - SUB
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.09.56250.166
О. С. Гусева, О. В. Малышкина
{"title":"Процессы переключения в керамике твердых растворов на основе Ca-=SUB=-0.3-=/SUB=-Ba-=SUB=-0.7-=/SUB=-Nb-=SUB=-2-=/SUB=-O-=SUB=-6-=/SUB=-","authors":"О. С. Гусева, О. В. Малышкина","doi":"10.21883/ftt.2023.09.56250.166","DOIUrl":"https://doi.org/10.21883/ftt.2023.09.56250.166","url":null,"abstract":"In this work, ceramic samples with a structure of the type of tetragonal tungsten bronzes, composition Са0.3Ba0.7Nb2O6 (CBN30) pure and with modifying additives SrTiO3, KTaO3 or LiTaO3 (5 mass %) were studied by the oscillographic method. It is shown that the introduction of modifying additives into CBN30 ceramics leads to an increase in the reversal polarization and to a decrease in dielectric losses, both at room temperature and at high temperatures. The introduction of LiTaO3 impurity into the CBN30 composition leads to the greatest increase in the reversal polarization. In contrast to ceramics based on lead zirconate titanate, which have a perovskite type structure, the introduction of SrTiO3 into CBN30 (having the structure of tetragonal tungsten bronzes) does not significantly improve the ferroelectric properties. It has been found that at temperatures above 100 °C for pure CBN30 ceramics, above 165 °C for CBN30 + 5% SrTiO3 and CBN30 + 5% KTaO3, and above 200 оС for CBN30 + 5% LiTaO3, there is a strong increase in dielectric losses. The contribution of dielectric losses to switching processes makes it impossible to determine the temperature of the ferroelectric phase transition for solid solutions based on CBN30 from the temperature dependences of dielectric hysteresis loops.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72800502","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
Особенности плоскостной магнитной анизотропии и доменной структуры пленок FeNi, осажденных в присутствии магнитного поля различной конфигурации 芬尼薄膜的平面磁各向异性和域结构的特征，在不同配置的磁场下被包围。
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.06.55640.17h
А. В. Свалов, Вячеслав Элизбарович Иванов, C.В. Андреев, В. Н. Лепаловский, Андрей Фещенко, Е. В. Кудюков, И. А. Макарочкин, Г. В. Курляндская
{"title":"Особенности плоскостной магнитной анизотропии и доменной структуры пленок FeNi, осажденных в присутствии магнитного поля различной конфигурации","authors":"А. В. Свалов, Вячеслав Элизбарович Иванов, C.В. Андреев, В. Н. Лепаловский, Андрей Фещенко, Е. В. Кудюков, И. А. Макарочкин, Г. В. Курляндская","doi":"10.21883/ftt.2023.06.55640.17h","DOIUrl":"https://doi.org/10.21883/ftt.2023.06.55640.17h","url":null,"abstract":"FeNi films in circular shape with 3 mm in diameter obtained by magnetron sputtering in the presence of a constant magnetic field of various configurations are studied. The presence of a field created by a permanent magnet with a diameter of 1.2 mm, the magnetization of which is oriented perpendicular to the plane of the substrate, leads to the formation of a vortex-like magnetic structure in the film, characterized by diffuse domain walls.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"329 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77592463","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
Энергетический спектр и спектр оптического поглощения экзоэдрального фуллерена С-=SUB=-70-=/SUB=-Br-=SUB=-10-=/SUB=- в модели Хаббарда 哈伯德模型中的能量谱和光学吸收光谱
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.01.53939.470
А. В. Силантьев
{"title":"Энергетический спектр и спектр оптического поглощения экзоэдрального фуллерена С-=SUB=-70-=/SUB=-Br-=SUB=-10-=/SUB=- в модели Хаббарда","authors":"А. В. Силантьев","doi":"10.21883/ftt.2023.01.53939.470","DOIUrl":"https://doi.org/10.21883/ftt.2023.01.53939.470","url":null,"abstract":"Energy spectrum exohedral fullerene С70Br10 with the Cs symmetry groups have been obtained within the Hubbard model and static fluctuation approximation. The energy states have been classified using the methods of group theory, and the allowed transitions in the energy spectra of molecule С70Br10 have been determined. On the basis of the energy spectrum of exohedral fullerene С70Br10 is given an interpretation of experimentally observed optical absorption bands molecule С70Br10.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76517038","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
Теплофизические свойства и фазовые переходы сегнетоэлектрика PbFe-=SUB=-0.5-=/SUB=-Nb-=SUB=-0.5-=/SUB=-O-=SUB=-3-=/SUB=- в области высоких температур 热力学家PbFe-= =SUB - 5-= -Nb-= =SUB - 5-= =SUB - 5-= =SUB -3-= =SUB
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.03.54754.562
С. Н. Каллаев, А. Г. Бакмаев, З. М. Омаров
{"title":"Теплофизические свойства и фазовые переходы сегнетоэлектрика PbFe-=SUB=-0.5-=/SUB=-Nb-=SUB=-0.5-=/SUB=-O-=SUB=-3-=/SUB=- в области высоких температур","authors":"С. Н. Каллаев, А. Г. Бакмаев, З. М. Омаров","doi":"10.21883/ftt.2023.03.54754.562","DOIUrl":"https://doi.org/10.21883/ftt.2023.03.54754.562","url":null,"abstract":"The thermophysical properties of the ferroelectric PbFe0.5Nb0.5O3 in the temperature range 300–800 K are studied. Anomalies in the heat capacity and thermal diffusion are found in the region of the diffuse ferroelectric transition Tc~380 K, the Burns temperature Td~670 K, and the intermediate temperature T^*~470 K. The dominant phonon heat transfer mechanisms in a ferroelectric with a nanopolar structure.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"438 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76471651","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
Магнитоимпеданс в сульфиде марганца, замещенного лютецием 路德会取代硫化锰中的磁阻抗
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.02.54293.527
Максим Николаевич Ситников, С. С. Аплеснин, А. М. Харьков, Х. Абдельбаки, Ф В Зеленов
{"title":"Магнитоимпеданс в сульфиде марганца, замещенного лютецием","authors":"Максим Николаевич Ситников, С. С. Аплеснин, А. М. Харьков, Х. Абдельбаки, Ф В Зеленов","doi":"10.21883/ftt.2023.02.54293.527","DOIUrl":"https://doi.org/10.21883/ftt.2023.02.54293.527","url":null,"abstract":"The components of the impedance, the impedance of the LuxMn1-xS solid solution (x < 0.2) in the temperature range of 80-500 K and the frequency of 100-106 Hz were studied. A change in the sign of the magnetoimpedance in concentration and temperature is found. The contribution of the reactive and active components to the magnetoimpedance is determined. The correlation of magnetoimpedance temperatures with the temperatures of the maximum attenuation of ultrasound and electrosound has been established. The frequency dependences of the reactive part of the impedance are described in the Cole-Cole model.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76767371","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
Микроструктура сферолитовых тонких пленок цирконата-титаната свинца 圆球薄膜钛铅微结构
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.08.56155.140
М. В. Старицын, В. П. Пронин, И.И. Хинич, С.В. Сенкевич, Е.Ю. Каптелов, И. П. Пронин, А.С. Елшин, Е. Д. Мишина
{"title":"Микроструктура сферолитовых тонких пленок цирконата-титаната свинца","authors":"М. В. Старицын, В. П. Пронин, И.И. Хинич, С.В. Сенкевич, Е.Ю. Каптелов, И. П. Пронин, А.С. Елшин, Е. Д. Мишина","doi":"10.21883/ftt.2023.08.56155.140","DOIUrl":"https://doi.org/10.21883/ftt.2023.08.56155.140","url":null,"abstract":"The features of the microstructure of radiant spherulites in lead zirconate titanate thin films are studied using scanning electron and nonlinear optical microscopy by varying the blocks size of the perovskite structure. It is shown that with an increase in the radius of the spherulite (or the size of blocks), the angle of rotation of the growth axis increases, the speed of the angle of rotation, and the magnitude of the signal of the second optical harmonic It is assumed that the reasons determining specifics of the structure and signal of the second optical harmonic are associated with a change in the magnitude of mechanical stresses in the films that arise due to a change in the phase density at perovskite phase crystallization from low-temperature pyrochlore phase or at perovskite phase recrystallization","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81741127","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
Фазовые переходы в фрустрированном кобальтите TmBaCo-=SUB=-4-=/SUB=-O-=SUB=-7-=/SUB=- -= ytet -伊甸园字幕组=-翻译:
Физика твердого тела Pub Date : 2023-01-01 DOI: 10.21883/ftt.2023.09.56257.138
З. А. Казей, В. В. Снегирев, М. С. Столяренко
{"title":"Фазовые переходы в фрустрированном кобальтите TmBaCo-=SUB=-4-=/SUB=-O-=SUB=-7-=/SUB=-","authors":"З. А. Казей, В. В. Снегирев, М. С. Столяренко","doi":"10.21883/ftt.2023.09.56257.138","DOIUrl":"https://doi.org/10.21883/ftt.2023.09.56257.138","url":null,"abstract":"For the first time, changes in lattice parameters (metrics) during a structural transition in stoichiometric cobalt TmBaCo4O7+x with x~ 0 (iodometric titration method) obtained by quenching from 900-950oC were investigated by direct X-ray method. It was found that during the structural transition TS~220-240 K, the Delta a/a parameter does not detect any features, parameters b and c experience jumps of different sign and different magnitude Delta b/b~3.5·10-3 and Delta c/c~-4.0·10-3, which leads to a jump in the volume of Delta V/V~ -0.5·10-3. The distortion value eo ~ -3.5·10-3 remains constant with increasing temperature and disappears abruptly during the transition.The distortion of the structure is accompanied by abnormal behavior of the Young's Delta E(T)/E0 module in the TS region. In the region of the expected magnetic phase transition of the cobalt subsystem, anomalies on the Young's modulus curve Delta E(T)/E0 were not detected, and a strong absorption peak at T~ 96 K on the internal friction dependence q-1(T) is, apparently, a sign of a developed short-range order.","PeriodicalId":24077,"journal":{"name":"Физика твердого тела","volume":"33 9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82780488","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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