Труды сотрудников института физики

/ Б. А. Беляев [и др.] // Изв. вузов. Физика. - 2013. - Т. 56, № 8/2. - С. 76-78
   Перевод заглавия: Microstrip protection device with resonant hts film element
Аннотация: Разработано и исследовано устройство защиты от радиоимпульса, представляющее собой трехзвенный микрополосковый фильтр, в котором прямая связь между входным и выходным резонаторами отсутствует, а полоса пропускания формируется посредством их взаимодействия со средним резонатором, полосковый проводник которого выполнен из ВТСП-пленки. Изготовлены макеты устройства с центральными частотами 8,6 ГГц и 9,4 ГГц и относительной шириной полосы пропускания 15 и 3,5 %, обеспечивающие подавление сигнала в режиме ограничения более чем на 25 дБ.
Construction of protection device against radio pulse having a structure of three-pole microstrip filter is developed and investigated. In the device outer resonators are coupled through a middle resonator, which is fulfilled of hightemperature superconducting film. Prototypes of the devices with central frequency 8,6 GHz and 9,4 GHz and relative bandwidth 15 and 3,5 % suppress a signal not less 25 dB in the limitation state.

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Беляев, Борис Афанасьевич; Belyaev, B. A.; Говорун, Илья Валерьевич; Govorun, I. V.; Лексиков, Александр Александрович; Leksikov, Al. A.; Сержантов, Алексей Михайлович; Serzhantov, A.M.

/ И. В. Говорун [и др.] // Изв. вузов. Физика. - 2015. - Т. 58, № 8/2. - С. 126-128. - Библиогр.: 2. - Работа выполнена при поддержке Министерства образования и науки РФ, соглашение №14-607-21-0039 . - ISSN 0021-3411
   Перевод заглавия: Investigation of operation of microstrip HTSC based power limiter in high power and short pulses modes
Аннотация: Разработано и изготовлено устройство защиты на основе микрополосковых резонаторов форме гантели с переключающим элементом, выполненным из ВТСП тонкой пленки. Исследованы передаточные характеристики устройства при работе с сигналами до 40 Вт мощности, а также влияние на полосу пропускания длительности одиночного импульса сигнала разной мощности. Проведена экспериментальная оценка времени переключения в закрытый режим.
A microstrip power limiter based on dumbbell-shaped resonators having a switcher made from high-temperature superconducting film was designed and fabricated. The transmission characteristics of the device were investigated in the case of microwave power level up to 40 W. An influence of single pulse duration of various magnitudes upon the passband of the device was investigated. An experimental estimation of the switch time to the closed mode was done.

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Говорун, Илья Валерьевич; Govorun, I. V.; Лексиков, Александр Александрович; Leksikov, Al. A.; Лексиков, Андрей Александрович; Leksikov, An. A.; Сержантов, Алексей Михайлович; Serzhantov, A. M.

/ D. Gokhfeld // J. Phys. Conf. Ser. - 2016. - Vol. 695, Is. 1. - Ст. 012008, DOI 10.1088/1742-6596/695/1/012008. - Cited References: 19 . - ISSN 1742-6588
Аннотация: Applications of the extended critical state model are considered. The trapped magnetic field, the penetration field and the field dependence of the critical current density are analysed. The critical current density and the trapped field in superconducting grains depend on the grain size. Asymmetry of the hysteresis curves relative to the M = 0 axis is related to the scale of the current circulation. © Published under licence by IOP Publishing Ltd.

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Доп.точки доступа:
Гохфельд, Денис Михайлович; International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials(9th ; 2 - 4 Sept. 2015)

/ D. M. Gokhfeld [et al.] // Physica C. - 2006. - Vol. 434, Is. 2. - P. 135-137, DOI 10.1016/j.physc.2005.12.088. - Cited References: 11 . - ISSN 0921-4534РУБ Physics, Applied

Аннотация: The magnetization of porous Bi(1.8)Pb(0.3)Sr(2)Ca(2)Cu(3)O(x) has been investigated. The experimental magnetization hysteretic loops of M(H) were described in the frames of Val'kov-Khrustalev model developed for type II granular superconductors. (c) 2005 Elsevier B.V. All rights reserved.

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Держатели документа:
SD RAS, LV Kirensky Phys Inst, High Magnet Fields Lab, Krasnoyarsk 660036, Russia
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics SD RAS, High Magnetic Fields Laboratory, Akademgorodok, 50, 660036 Krasnoyarsk, Russian Federation
M.F. Reshetnev Siberian State Aerospace University, 660014 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович

/ I. V. Govorun, A. A. Leksikov // International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, EDM : [29 June 2017 - 03 July 2017, Erlagol, Russia] : IEEE Computer Society, 2017. - P. 80-82, DOI 10.1109/EDM.2017.7981712. - Cited References: 7. - The work was supported by the Ministry of Education and Science of the Russian Federation, grant Cn-3036.2016.3.of the President of the Russian Federation for State Support of Young Russian Scientists.
   Перевод заглавия: ВТСП СВЧ ограничитель мощности на основе микрополосковых четвертьволновых резонаторов
Аннотация: A microwave power limiter based on three-pole microstrip filter is designed, fabricated and tested. In the device outer resonators are coupled through an inner resonator containing high-temperature superconducting film. Prototype of the device with central frequency 8.3 GHz and relative bandwidth 7% has insertion loss 3 dB in the open state and signal suppression not less 35 dB in the limitation state.

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Доп.точки доступа:
Leksikov, Al. A.; Лексиков, Александр Александрович; International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices(18 ; 2017 ; Jun.-Jul. ; Erlagol, Russia)

/ D. M. Gokhfeld, D. A. Balaev // Phys. Solid State. - 2020. - Vol. 62, Is. 7. - P. 1145-1149, DOI 10.1134/S1063783420070069. - Cited References: 32 . - ISSN 1063-7834
Аннотация: The origin of the low magnetization anisotropy of the textured bulk samples consisting of highly anisotropic (Bi,Pb)2Sr2Ca2Cu3Ox (Bi-2223) high-temperature superconductor crystallites has been investigated. It has been established that the observed anisotropy is determined by the disordering of Bi-2223 crystallites in the sample. The measured anisotropy of the textured sample makes it possible to determine the magnetic angle characterizing the ordering of crystallites.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Гохфельд, Денис Михайлович

/ S. V. Semenov, D. A. Balaev // Phys. Solid State. - 2020. - Vol. 62, Is. 7. - P. 1136-1144, DOI 10.1134/S1063783420070239. - Cited References: 61. - The authors are grateful to D.M. Gokhfeld for discussion of the results. The measurements of the transport properties were performed in part on a PPMS-6000 facility at the Krasnoyarsk Territorial Center of Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 1063-7834
Аннотация: A model for describing the magnetoresistance behavior in a granular high-temperature superconductor (HTS) that has been developed in the last decade explains a fairly extraordinary form of the hysteretic R(H) dependences at T = const and their hysteretic features, including the local maximum, the negative magnetoresistance region, and the local minimum. In the framework of this model, the effective field Beff in the intergrain medium has been considered, which represents a superposition of the external field and the field induced by the magnetic moments of HTS grains. This field can be written in the form Beff(H) = H + 4παM(H), where M(H) is the experimental field dependence of the magnetization and α is the parameter of crowding of the magnetic induction lines in the intergrain medium. Therefore, the magnetoresistance is a function of not simply an external field, but also the “internal” effective field R(H) = f(Beff(H)). The magnetoresistance of the granular YBa2Cu3O7 – δ HTS has been investigated in a wide temperature range. The experimental hysteretic R(H) dependences obtained in the high -temperature range (77–90 K) are well explained using the developed model and the parameter α is 20–25. However, at a temperature of 4.2 K, no local extrema are observed, although the expression for Beff(H) predicts them and the parameter α somewhat increases (~30–35) at this temperature. An additional factor that must be taken into account in this model can be the redistribution of the microscopic current trajectories, which also affects the dissipation in the intergrain medium. At low temperatures under the strong magnetic flux compression (α ~ 30–35), the microscopic trajectories of the current Im can change and tunneling through the neighboring grain is preferred, but the angle between Im and Beff will be noticeably smaller than 90°, although the external (and effective) field direction is perpendicular to the macroscopic current direction.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Семёнов, Сергей Васильевич

/ A. N. Maksimova, V. A. Kashurnikov, A. N. Moroz, D. M. Gokhfeld // J. Supercond. Nov. Magn. - 2022. - Vol. 35, Is. 1. - P. 283-290, DOI 10.1007/s10948-021-06067-7. - Cited References: 35. - The reported study was funded by RFBR and ROSATOM according to the research project No 20-21-00085 (V.A. Kashurnikov, A.N. Moroz) . - ISSN 1557-1939. - ISSN 1557-1947РУБ Physics, Applied + Physics, Condensed Matter

Аннотация: The Monte Carlo method has been used to calculate the trapped magnetic field in superconducting plates with holes. The mechanism of flux pinning on the holes is implemented with special subprocesses added to the algorithm: vortex capture and emission, both occurring on the hole boundaries. Secondary peaks related to the holes emerge on the calculated profiles of the trapped magnetic field. It has been found that these peaks disappear in plates with sufficiently strong pinning or when the computational mesh is coarse (the case corresponding to a low resolution of probes in experiments). The dependence of the trapped field on the hole radius has been analyzed.

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Держатели документа:
Natl Res Nucl Univ MEPhI, Moscow 115409, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Maksimova, A. N.; Kashurnikov, V. A.; Moroz, A. N.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; RFBRRussian Foundation for Basic Research (RFBR) [20-21-00085]; ROSATOM [20-21-00085]

/ M. R. Koblischka, A. Koblischka-Veneva, Q. Nouailhetas [et al.] // 7th International workshop on numerical modeling of high temperature superconductors (HTS 2020) : [Theses]. - 2021. - Cited References: 9
Аннотация: Modelling the mechanical and superconducting properties of superconducting, open-cell foam samples requires a proper description of their specific microstructure. For this purpose, foam samples are investigated using optical microscopy, SEM and x-ray tomography, enabling to identify the parameters important for modelling.

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Доп.точки доступа:
Koblischka, M. R.; Koblischka-Veneva, A.; Nouailhetas, Q.; Berger, K.; Douine, B.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; International Workshop on Numerical Modelling of High Temperature Superconductors(7 ; 2021 ; June ; 22-23 ; Nancy, France (virtual))

/ S. V. Semenov, D. A. Balaev, M. I. Petrov // Phys. Solid State. - 2021. - Vol. 63, Is. 7. - P. 1069-1080, DOI 10.1134/S1063783421070192. - Cited References: 80. - The authors are grateful to D.M. Gokhfeld for discussion of the results. The measurements of the transport properties were performed in part on a PPMS-6000 system of the Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences . - ISSN 1063-7834. - ISSN 1090-6460РУБ Physics, Condensed Matter

Аннотация: Regularities in the behavior of the magnetoresistance hysteresis R(H) in the granular yttrium high-temperature superconductors (HTSs) have been established. For this purpose, a comparative analysis of the magnetotransport properties has been carried out on the granular HTS samples, which exhibit (i) approximately the same magnetic properties and temperatures of the onset of the superconducting transition (90.5–93.5 K, which is characteristic of HTS grains) and (ii) different critical transport currents JC (which is characteristic of grain boundaries). Despite a significant (by more than an order of magnitude) spread of the JC values for the three samples, a universal behavior of the magnetoresistance hysteresis has been found, which is apparently inherent in all the granular Y–Ba–Cu–O compounds. The R(H) hysteresis is extremely broad and, in a fairly wide external field range, the dependence of the magnetoresistance hysteresis width ΔН on the field Hdec (the external field for the decreasing hysteresis branch is Н = Hdec) is almost linear: ΔH ≈ Hdec. This behavior is observed over the entire temperature range of implementation of the superconducting state (the investigations have been carried out at temperatures of 77–88 and 4.2 K). The result obtained has been explained by considering the effective field in grain boundaries, which is a superposition of the external field and the field induced by the magnetic moments of grains. The field induced by grains, in turn, significantly increases in the region of grain boundaries due to the magnetic flux compression (the grain boundary length is shorter than the HTS grain size by several orders of magnitude). The aforesaid has been confirmed by the analysis of the R(H) hysteresis for the Y–Ba–Cu–O- and CuO-based HTS composite, in which the grain boundary length is purposefully increased; as a result, the flux compression is less pronounced and the R(H) hysteresis narrows.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Petrov, M. I.; Петров, Михаил Иванович; Семёнов, Сергей Васильевич

/ S. V. Semenov, D. M. Gokhfel'd, K. Y. Terent'ev, D. A. Balaev // Phys. Solid State. - 2021. - Vol. 63, Is. 12. - P. 1785-1794, DOI 10.1134/S1063783421100334. - Cited References: 72. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 20-42-240008 "Effect of introduction of paramagnetic ions of rare-earth elements on the superconducting properties of YBCO materials" . - ISSN 1063-7834. - ISSN 1090-6460РУБ Physics, Condensed Matter

Аннотация: The hysteretic behavior of magnetoresistance R(H) of the granular high-temperature superconductor (HTS) HoBa2Cu3O7 – δ has been investigated. The YBCO superconductors with a rare-earth element (Nd, Ho, Er, Sm, Yb, or Dy) with the magnetic moment in the yttrium site are characterized by a significant paramagnetic contribution to the total magnetization. The main goal of this study has been to establish the possible effect of this paramagnetic contribution on the magnetotransport properties, which are determined by tunneling of superconducting current carriers through the grain boundaries. An analysis of the results obtained basing on the concept of an effective field in the intergrain medium showed that the distribution of the magnetic induction lines from the paramagnetic moments is fundamentally different from that of the Meissner currents and Abrikosov vortices. The magnetic induction lines from the paramagnetic moments are not concentrated in the region of grain boundaries and therefore insignificantly affect the magnetotransport properties of a granular HTS. At the same time, the magnetic induction lines are strongly concentrated in the grain boundaries, which is caused by the Meissner currents and Abrikosov vortices, due to the features of their properties. Specifically, the magnetic flux compression determines the magnetotransport (in particular, the R(H) hysteresis) properties of granular HTSs, including 1–2–3 ones, with a rare-earth ion with the magnetic moment.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Semenov, S. V.; Семёнов, Сергей Васильевич; Gokhfel'd, D. M.; Гохфельд, Денис Михайлович; Terent'ev, K. Yu.; Терентьев, Константин Юрьевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk krai; Krasnoyarsk Territorial Foundation for Support of Scientific and RD Activities [20-42-240008]

[Текст] / Б. А. Беляев [и др.] // Журнал радиоэлектроники. - 2011. - № 7. - С. 1-12 . - ISSN 1684-1719

ГРНТИ

29.19

Аннотация: Продемонстрирована возможность создания устройства защиты от мощного радиоимпульса на основе микрополосковых резонаторов, связь между которыми осуществляется через третий резонатор, содержащий ВТСП элемент. Работа устройства основана на том, что под действием радиоимпульса, мощность которого превосходит заданный порог, ВТСП элемент переходит из сверхпроводящего в нормальное, высокорезистивное состояние, вследствие чего добротность связующего резонатора падает до неопределяемой величины, а связь между входным и выходным резонаторами "разрушается".
An ability is demonstrated to create a device protecting from intense radio-pulse on the base of microstrip resonators coupled trough the third one containing HTS element. The device operates as follows. Under radio-pulse action whose intense exceeds a specific threshold the HTS element switches from the superconductive state to the normal one having high resistance, as a sequence, the quality factor of the coupling resonator drops, and the coupling between input and output resonators is destroyed.

РИНЦ

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН, Красноярск
Сибирский государственный аэрокосмический университет, Красноярск
Сибирский федеральный университет, Красноярск

Доп.точки доступа:
Беляев, Борис Афанасьевич; Говорун, Илья Валериевич; Лексиков, Александр Александрович; Сержантов, Алексей Михайлович

/ D. A. Balaev, S. V. Semenov, D. M. Gokhfeld // J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 7-9. - P. 1631-1648, DOI 10.1007/s10948-023-06608-2. - Cited References: 58. - The authors are grateful to M.I. Petrov, A.D. Balaev, and V.M. Sosnin for fruitful discussions and A.V. Shabanov and I.V. Nemtsev for scanning electron microscopy investigations. The scanning electron microscopy investigations and a part of magnetic measurements (performed on a LakeShore VSM 8604 facility) were carried out at the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The study is performed within the state assignment of Kirensky Institute of Physics . - ISSN 1557-1939. - ISSN 1557-1947
Аннотация: Granular high-temperature superconductors (HTSs) are characterized by the hysteretic field dependences of magnetoresistance R(H) and critical current IC(H). These hysteretic effects are described within the concept of an effective field in the intergrain medium. The effective field is a superposition of external magnetic field H and the field induced by the magnetic moments of superconducting grains into intergrain spacings (grain boundaries). The magnetization of superconducting grains is determined by two contributions: Meissner (shielding) currents (MC) and trapped magnetic fluxes (Abrikosov vortices (AV)). To develop the concept of an effective field in the intergrain medium, the magnetotransport properties (R and IC) have been compared for two cases: (AV) the magnetization of superconducting grains is only determined by the trapped magnetic flux (zero external field) and (MC) HTS grains are in the Meissner state (the external field is weaker than the first critical field of grains). In a set of experiments, the main features of the hysteretic R(H) and M(H) dependences have been illustrated and the external conditions for implementing the AV and MC states have been established. It has been found that the effects of the Abrikosov vortices and intragrain Meissner currents on an effective field in the intergrain medium at the same magnetization values are noticeably different. This is a nontrivial fact that requires a thorough study of the impact of the anisotropy of the superconducting properties of grains on the configuration of the Meissner currents in them, as well as on the orientation of vortices both inside grains and near their surface. We suggest the explanation of observed stronger effect of the Meissner currents on the intergrain medium as compared with the effect of the Abrikosov vortices.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Semenov, S. V.; Семёнов, Сергей Васильевич; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Балаев, Дмитрий Александрович

/ A. N. Maksimova, D. M. Gokhfeld, A. N. Moroz, V. A. Kashurnikov // Chin. J. Phys. - 2024. - Vol. 88. - P. 493-502, DOI 10.1016/j.cjph.2023.11.030. - Cited References: 31. - V.A. Kashurnikov and A.N. Maksimova were supported by the Ministry of Science and Higher Education of the Russian Federation (state task project No. FSWU-2023-0031), A.N. Moroz was supported by MEPhI Program Priority 2030 . - ISSN 0577-9073. - ISSN 2309-9097
Аннотация: Vortex relaxation has been studied in a microsized HTS with various distributions of artificial pinning in the form of submicro-holes. It has been shown that, in some cases, for a superconductor with dimensions up to several micrometers, the time dependences of the trapped magnetic field do not correspond with the collective creep model. The dependences of the trapped-field relaxation rate and vortex activation energy on the magnetizing field (up to 0.5 T) and temperature (up to 50 K) have been obtained. It has been shown that the presence of submicro-holes slightly increases the relaxation rate, mainly due to the decrease in the number of random nanosized pinning centers.

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Держатели документа:
National Research Nuclear University MEPhI, Moscow, 115409 Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036 Russia
Siberian Federal University, Krasnoyarsk, 660041 Russia

Доп.точки доступа:
Maksimova, A.N.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Moroz, A.N.; Kashurnikov, V.A.