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Загальна кількість знайдених документів : 19 Представлено документи з 1 до 19 |
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| 1. | 
Yudanov N. A. Effect of Bias Fields on Off-diagonal Magnetoimpedance (MI) Sensor Performance [Електронний ресурс] / N. A. Yudanov, A. A. Rudyonok, L. V. Panina, A. V. Kolesnikov, A. T. Morchenko, V. G. Kostishyn // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03046-1-03046-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_48 This paper investigates the performance of off-diagonal magnetoimpedance in Co-based amorphous wire subjected to dc bias fields: circular and orthogonal (with respect to the wire axis). Typically it is assumed that the wire impedance is insensitive to the orthogonal field so the wire element can be used to construct 3D sensors. Our results demonstrated the possibility of large impedance change due to this field, in the range of 10 mV/Oe. The dc current in a wire generating a circular field results in improved sensitivity due to elimination of the domain structure and smoothing the effect of the anisotropy deviations. | ||
| 2. |
Shipko M. N. Influence of Magnetic Pulseprocessing on Oxide Materials Physics and Mechanical Properties [Електронний ресурс] / M. N. Shipko, V. V. Korovushkin, A. V. Smagina, V. G. Kostishyn, L. V. Kogitov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03060-1-03060-5. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_62 Internal stresses, specific single-crystal blocks, stoichiometric impurity of oxides composition and other factors lead to low strength properties of ferromagnetic iron oxides. Weakening of such defects and increasing iron oxides microhardness, their fracture and mechanic strength are possible by using magnetic pulse processing. The results of experimental studies of the magnetic pulse field effecting on the iron oxides strength properties are shown. Mіssbauer spectroscopy, porosimetry, X-ray structure analysis are used to find the mechanisms of this effect. The strength properties change is the result of set of microscopic and quantum effects superposition. It provides easy defects restructuring of solids: vacancies, dislocations, voids. | ||
| 3. |
Morchenko A. T. On Properties of Magneto-dielectric Composites in the Effective Medium Approximation [Електронний ресурс] / A. T. Morchenko, L. V. Panina, S. V. Podgornaya, V. G. Kostishyn, P. A. Ryapolov // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03073-1-03073-6. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_75 The development of ultra-broadband composite absorbers of electromagnetic waves depends largely on optimal combination of the medium characteristics that determine their absorption capacity and conditions for impedance matching and destructive interference. It is possible to achieve a higher absorption level in a wider frequency band by combining a variety of mechanisms enhancing the loss of electromagnetic field energy, for example, by combining specific constituents in a composite matrix. The analysis of various mixing models for constituent parameters is carried out in the effective medium approximation for ferritedielectric composites. It appears that the standard mixing rules do not explain the increase in the effective permittivity of ferrite composites in comparison with that of bulk ferrites. The proposed mechanism of such increase is based on the conductive properties of the ferrite granules and the equivalent capacitance effect. The developed model of permittivity calculation is based on the equivalent capacitor circuits and gives a satisfactory agreement with the experimental data. | ||
| 4. |
Morchenko A. T. On Influence of Magnetic Fields and Excitation Conditions on the Magnetization Distribution in Microwire Magnetoimpedance Element [Електронний ресурс] / A. T. Morchenko, L. V. Panina, V. G. Kostishyn // Журнал нано- та електронної фізики. - 2014. - Т. 6, № 3. - С. 03075-1–03075-5. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2014_6_3_77 One of important condition for the successful development of effective magnetic field sensors based on amorphous ferromagnetic microwires is to identify factors affecting the reversal processes in the surface layer of the magnetoimpedance wire. In this paper, the distribution of magnetization is considered as a function of the magnetic properties of the wire material, current flowing through it, strength and orientation of the external magnetic field. The impact of these factors on the performance of the sensor is analyzed on the basis of the numerical simulation of the sensor element. | ||
| 5. | 
Yudanov N. A. High Sensitivity Magnetic Sensors Based on Off-diagonal Magnetoimpedance in Amorphous FeCoSiB Wires [Електронний ресурс] / N. A. Yudanov, L. V. Panina, A. T. Morchenko, V. G. Kostishyn, P. A. Ryapolov // Journal of Nano- and Electronic Physics. - 2013. - Vol. 5, № 4(1). - С. 04004-1-04004-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnep_2013_5_4(1)__6 The magnetoimpedance (MI) effect has a potential for the development of high performance magnetic sensors. For sensor applications, off-diagonal configuration is preferable when the MI element is excited by ac current and the output is detected from the coil. In the present work, the off-diagonal sensor design was advanced by utilising a complex waveform excitation produced by a microcontroller and applied to a multiple wire MI element. For optimised excitation with a waveform close to a positive half sine form and characteristic frequency of 8 MHz the field resolution of about 60 mV/Oe was achieved. The pulse excitation does not require an additional bias since it includes controllable low frequency components. The concept of microcontroller driven sensor element could be attractive for the development of intellectual sensors. | ||
| 6. | 
Chitanov D. Applying the ltcc-technology to obtain hexaferrites for base layers of microstrip shf devices [Електронний ресурс] / D. Chitanov, V. Kostishyn, L. Kozhitov, A. Adamtsov // Восточно-Европейский журнал передовых технологий. - 2016. - № 5(1). - С. 27-31. - Режим доступу: http://nbuv.gov.ua/UJRN/Vejpte_2016_5(1)__6 За допомогою методу низькотемпературної сумісно обпалюваної кераміки (LTCC - Low Temperature Co-fired Ceramics) одержано зразки ізо- та анізотропних полікристалічних гексаферритів BaFe12O19 і SrFe12O19 для підкладок надмініатюрних мікросмужкових феритових розв'язувальних приладів короткохвильової частини міліметрового діапазону довжин хвиль. Досягнуто ущільнення зразків за 900 °C у процесі спікання з додаванням невеликої кількості Bi2O3 - B2O3 - SiO2 - ZnO. | ||
| 7. |
Kostishyn V. Obtaining anisotropic hexaferrites for the base layers of microstrip shf devices by the radiation-thermal sintering [Електронний ресурс] / V. Kostishyn, I. Isaev, S. Scherbakov, A. Nalogin, E. Belokon, A. Bryazgin // Восточно-Европейский журнал передовых технологий. - 2016. - № 5(8). - С. 32-39. - Режим доступу: http://nbuv.gov.ua/UJRN/Vejpte_2016_5(8)__6 | ||
| 8. |
Kostishyn V. G. Effect of Temperature Mode of Radiation-thermal Sintering the Structure and Magnetic Properties of Mn-Zn-ferrites [Електронний ресурс] / V. G. Kostishyn, A. S. Komlev, M. V. Korobeynikov, A. A. Bryazgin, V. I. Shvedunov, A. V. Timofeev, M. A. Mikailenko // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04044-1-04044-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_46 | ||
| 9. |
Shipko M. N. The Physical Model of Formation of Hexagonal Ferrites BaFe12O19 [Електронний ресурс] / M. N. Shipko, V. G. Kostishyn, D. N. Chitanov // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04046-1-04046-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_48 To identify the features of structural transformations occurring during the formation of the crystal lattice of hexagonal barium ferrite were studied the following issues: component defined that are structural element in the reaction of solid-phase synthesis of ferrites BaFe12O19; the phase composition set of the reaction products formed in mixtures of BaCO3 - α-Fe2O3; a crystal-chemical model developed allows visually describe the transformation of α-Fe2O3 - BaFe12O19. | ||
| 10. |
Kostishyn V. G. Obtaining and Properties of Hexaferrite BaFe12O19 for High-coercivity Permanent Magnets and Substrates Microstrip Microwave Devices of mm-Range [Електронний ресурс] / V. G. Kostishyn, V. V. Korovushkin, D. N. Chitanov, Yu. M. Korolev // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04057-1-04057-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_59 In the work by ceramic technology produced samples isotropic and anisotropic polycrystalline hexaferrite BaFe12O19 and investigated their properties. It is shown that as the permanent magnets can be used both types of samples, whereas for substrates microstrip microwave devices mm-range expedient to use only anisotropic polycrystalline hexaferrite BaFe12O19. | ||
| 11. |
Kostishyn V. G. Obtaining of Nanostructured Powders of Barium and Strontium Hexaferrite by the Polymer Precursor Method [Електронний ресурс] / V. G. Kostishyn, A. V. Timofeev, D. N. Chitanov // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04066-1-04066-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_68 Studied the possibility of obtaining by precursors in the polymer nanostructured powders of barium hexaferrite BaFe | ||
| 12. |
Andreev V. G. Influence of Modes Shredding of Source Components by Processes to Synthesis and Activity of Powder Sintering Hexaferrite [Електронний ресурс] / V. G. Andreev, V. G. Kostishyn, N. D. Ursulyak, A. G. Nalogin, A. A. Kudashov // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04070-1-04070-5. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_72 The influence of the modes of wet grinding of the original ferrite-forming components on their activity and the temperature of the synthesis powders of hexaferrites. It is shown that grinding of the initial components in the acidic environment can reduce the synthesis temperature of hexaferrites. The increased activity of the powders during milling in acidic medium due to the formation on the surface of particles of gellike layers of hydroxides of barium or strontium. The activity formed gelled layers to a significant extent can be controlled by introducing surfactants in the wet grinding. | ||
| 13. |
Shipko M. N. Magnetic Microstructure Aluminum-substituted Barium Hexaferrite for Microwave Devices mm-Wavelength Range [Електронний ресурс] / M. N. Shipko, V. V. Korovushkin, V. G. Kostishyn, N. D. Ursulyak, A. G. Nalogin, E. S. Savtchenko // Журнал нано- та електронної фізики. - 2015. - Т. 7, № 4. - С. 04075-1-04075-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2015_7_4_77 The magnetic structure and cationic distribution was investigate in ferrite with a hexagonal structure BaFe12-xAlxO12 (x ≤ 2). It is found that when x = 2Al3+ ions are localized mainly in the positions of 12k (α-sublattice) and 4f1 (c-sublattice). This contribute to change of number magnetically active connections and therefore the magnetic structure of ferrite and magnetic parameters. It was concluded about the possibility of using the results obtained with the choice of optimal composition of substrates for millimeterwave devices. | ||
| 14. |
Shipko M. N. Magnetic Properties and Local Parameters of Crystal Structure for BaFe12O19 and SrFe12O19 Hexagonal Ferrites [Електронний ресурс] / M. N. Shipko, V. G. Kostishyn, V. V. Korovushkin, I. M. Isaev, M. A. Stepovich, A. I. Tikhonov, E. S. Savchenko // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 3. - С. 03004-1-03004-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_3_6 It is shown that difference between magnetic properties of hexagonal ferrites BaFe12O19 and SrFe12O19 is connected with difference of electronic configurations of Ba2+ and Sr2+ ions, and their ionic radii. Re-placement of Ba2+ ions by Sr2+ ions that are smaller in size effects the degree of distortions of octahedrons located either in a hexagonal R-block or at its boundary with S-block. It contributes to a preferred localization of electrically active vacancies at the boundary of R- and S-blocks or in a surface layer of crystallites, and provides residual polarization of ferrites with hexagonal structure. | ||
| 15. |
Chitanov D. N. Obtaining Hexagonal Ferrites for Substrates Microstrip Microwave Devices of mm-Range of LTCC-technology [Електронний ресурс] / D. N. Chitanov, V. G. Kostishyn, L. V. Kozhitov, A. Yu. Adamtsov // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 3. - С. 03013-1-03013-4. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_3_15 In the work by the method low temperature co-fired ceramics (LTCC) obtained samples of isotropic and anisotropic polycrystalline hexafemte BaFe12O19 and SrFe12O19. Using in the LTCC-technology the pressing operation for samples (tablets) in a magnetic field produces anisotropic hexaferrites, pressing without a magnetic field - isotropic hexafemtes. Application in the LTCC-technology molding process tape produces exclusively isotropic samples. | ||
| 16. |
Chitanov D. N. LTCC-technology for Producing Hexaferrites [Електронний ресурс] / D. N. Chitanov, V. G. Kostishyn, L. V. Kozhitov, P. A. Ryapolov, A. Yu. Adamtsov // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 3. - С. 03016-1-03016-6. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_3_18 In the review examined the possibility of using LTCC-technology for obtaining hexafemtes as reaction additives glasses Bi | ||
| 17. |
Andreev V. G. Influence of Surfactants on the Activity Powders of Barium Hexaferrite, Prepared by Wet Grinding [Електронний ресурс] / V. G. Andreev, V. G. Kostishyn, A. G. Nalogin, A. Yu. Adamtsov, P. A. Ryapolov // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 4(2). - С. 04056-1-04056-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_4(2)__7 Study the influence of citric acid and isopropyl alcohol on processes of wet grinding mixture of starting ferrite constituting components and synthesized ferrite charge. Found that the introduction of additives during wet grinding allows to significantly reduce the temperature of synthesis and sintering ferrite raw blanks. Increased activity of powders is explained by the formation of active the gelled layers on the surface of particles in the process of wet grinding. | ||
| 18. |
Andreev V. G. Influence of Surfactants on the Activity Powders of Barium Hexaferrite, Prepared by Wet Grinding [Електронний ресурс] / V. G. Andreev, V. G. Kostishyn, A. G. Nalogin, A. Yu. Adamtsov, P. A. Ryapolov // Журнал нано- та електронної фізики. - 2016. - Т. 8, № 4(2). - С. 04079-1-04079-3. - Режим доступу: http://nbuv.gov.ua/UJRN/jnef_2016_8_4(2)__30 Study the influence of citric acid and isopropyl alcohol on processes of wet grinding mixture of starting ferrite constituting components and synthesized ferrite charge. Found that the introduction of additives during wet grinding allows to significantly reduce the temperature of synthesis and sintering ferrite raw blanks. Increased activity of powders is explained by the formation of active the gelled layers on the surface of particles in the process of wet grinding. | ||
| 19. |
Kostishyn V. Study of the features of the magnetic and crystal structures of the BaFe12-Х ALXO19 and BaFe12-Х GaXO19 substituted hexagonal ferrites [Електронний ресурс] / V. Kostishyn, V. Korovushkin, I. Isaev, A. Trukhanov // Восточно-Европейский журнал передовых технологий. - 2017. - № 1(5). - С. 10-15. - Режим доступу: http://nbuv.gov.ua/UJRN/Vejpte_2017_1(5)__3 Розглянуто механізм формування гексафериту барію з заміщенням іонами Al і Ga. Заміщення відбуваються в підгратці 12k. Це призводить до виникнення нееквівалентних положень іонів Fe<^>3+ | ||
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