Факультет електроніки та інформаційних технологій (ЕлІТ)
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Item Magnetoresistive Properties of Multilayer Film Systems Based on Permalloy and Silver(Vasyl Stefanyk Precarpathian National University, 2021) Пазуха, Ірина Михайлівна; Пазуха, Ирина Михайловна; Pazukha, Iryna Mykhailivna; Шуляренко, Денис Олегович; Шуляренко, Денис Олегович; Shuliarenko, Denys Olehovych; Долгов-Гордійчук, Сергій Романович; Долгов-Гордейчук, Сергей Романович; Dolhov-Hordiichuk, Serhii Romanovych; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa ValentynivnaIn this paper, the experimental investigation focuses on the magnetoresistive properties of nanosized film systems. Their structure changes from layered to granular due to transition from bilayer FM/NM (FM is a ferromagnetic material, NM is a nonmagnetic material) to [FM/NM]n multilayer film at a constant total thickness of samples. As ferromagnetic and nonmagnetic materials were chosen permalloy Ni80Fe20 (Py) and Ag, respectively. It was demonstrated that the shape of the field dependences of magnetoresistance depends on the number of bilayer Py/Ag. For as-deposited [Py/Ag]n/S at n = 8, 16, the transition from the antiferromagnetic ordering of magnetic moments to ferromagnetic one occurs under an external magnetic field. As a result, the resistivity of the samples reduced, and the giant magnetoresistive effect was realized. The increase of the number of bilayers repeats from 2 to 16 at the unchanged total thickness of the system leads to the growth of the magnetoresistance from 0.1 % to 0.35 %. During annealing up to 600 K, the magnetoresistive effect is reduced, but it does not disappear completely.Item Concentration and Size Effects in Electrophysical Properties of Thin Films Based on Permalloy and Silver(Vasyl Stefanyk Precarpathian National University, 2020) Пазуха, Ірина Михайлівна; Пазуха, Ирина Михайловна; Pazukha, Iryna Mykhailivna; Шуляренко, Денис Олегович; Шуляренко, Денис Олегович; Shuliarenko, Denys Olehovych; Пилипенко, Олександр Валерійович; Пилипенко, Александр Валериевич; Pylypenko, Oleksandr Valeriiovych; Овруцький, Максим Сергійович; Овруцкий, Максим Сергеевич; Ovrutskyi, Maksym Serhiiovych; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa ValentynivnaComplex study of electrophysical properties (the electrical resistivity r and the temperature coefficient of resistance (TCR) b) of thin-film samples based on ferromagnetic alloy Ni80Fe20 (permalloy) and noble metal Ag in a wide composition range and within the range of thickness 20-100 nm done. Thin films were obtained by the method of electron-beam co-evaporation technique at room temperature. Their composition was investigated using the method of X-ray spectrometry. The phase state was analyzed by the electron diffraction method. It was demonstrated that the crystal structure of thin films stays unchanged during the annealing process to 500 K. The size and concentration dependences of r and b values were obtained. The corresponding maximum and minimum at the concentration of Ag atoms of 50-60 at.% observed at the dependences r(cAg) and b(cAg). Size dependences r(d) and b(d) associated with the size effects in thin-film materials.Item Тemperature and Concentration Dependences of Anisotropic Magnetoresistance Film Materials(Sumy State University, 2015) Проценко, Сергій Іванович; Проценко, Сергей Иванович; Protsenko, Serhii Ivanovych; Гричановська, Оксана Анатоліївна; Гричановская, Оксана Анатольевна; Hrychanovska, Oksana Anatoliivna; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Проценко, Іван Юхимович; Проценко, Иван Ефимович; Protsenko, Ivan Yukhymovych; Shumakova, M.O.In framework the phenomenological approach the question of the temperature dependence of anisotropic magnetoresistance (AMR) at the fixed value inducing an external magnetic field (B) and the concentration dependence of AMR at the fixed B and T were analyzes. The obtained ratio to assess and predict the magnitude of thermal and concentration coefficients of AMR, virtually can not be done in the classical model, since it allows complex ratio with many uncertain parameters.Item The Electronic Properties of Film Materials Based on Fe and Pt or Ge(Sumy state university, 2015) Власенко, Олександр Володимирович; Власенко, Александр Владимирович; Vlasenko, Oleksandr Volodymyrovych; Подуремне, Дмитро Васильович; Подуремне, Дмитрий Васильевич; Poduremne, Dmytro Vasylovych; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa ValentynivnaOn the basis of thin films in microelectronics made the following elements of integrated circuits (IC): film resistors; electrodes (electrode film capacitors, spiral inductors busducts, installation guides, closures MIS transistors) contact paths and platforms; auxiliary elements. Electrical connection of metals and semiconductors with metallic conductors is performed using layered condensation and formation of ohmic contacts not rectifier, the quality of which is largely dependent parameters and characteristics of microelectronic devices, their reliability and durabilityItem Phenomenological Theory of Strain Effect in Granular Film Alloys(Sumy State University, 2014) Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Shumakova, M.O.; Проценко, Іван Юхимович; Проценко, Иван Ефимович; Protsenko, Ivan Yukhymovych; Шабельник, Юрій Михайлович; Шабельник, Юрий Михайлович; Shabelnyk, Yurii Mykhailovych; Шумакова, Наталія Іванівна; Шумакова, Наталия Ивановна; Shumakova, Nataliia IvanivnaThe elementary theory tensoresistive effect in granular thin film materials was proposed. Analyzed limiting cases of large, small and normal concentration of magnetic granules. It is concluded that in all three cases, the strain coefficient is defined tensoresistive properties of the matrix solid solution film samples as granules sold ballistic electrocarry charge.Item Influence of Magnetic Field on Thermal Coefficient of Resistance of the Granular Film Alloys(Sumy State University, 2014) Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa ValentynivnaThe elementary theory about the effects of external magnetic field on the value of the thermal coefficient of resistance (B) granular alloy film was proposed. The obtained value allows calculating the difference between the value B for the sample and solid solution, which based on the granular alloy was formed.Item Тhermoresistive Properties of Film Systems with Elements of Granular State(Sumy State University, 2014) Hrychanovs’ka, O.A.; Karpenko, K.H.; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Проценко, Сергій Іванович; Проценко, Сергей Иванович; Protsenko, Serhii Ivanovych; Panchal, C.J.; Kher, V.H.; Mehta, P.K.; Poduremne, D.V.; Protsenko, I.Yu.The question about the conditions of formation granular solid solutions (systems based on components with limited or unlimited solubility) or peculiar quasigranular films (systems with mutual solubility of the components and the formation of intermetallic phases in the bulk samples). On example of the first film (Ag/Fe/S) and second (Fe/Pt/Fe/S, [Fe/Pt]8 /S) films types the temperature and concentration dependences of the resistance and thermal coefficient of resistance (TCR) were studies. It is concluded that the value of TCR will always depend on the composition (type of crystal lattices) termostabilize film material, rather than on the efficiency of electron scattering in granules or quasigranular because they will most likely realized ballistic charge transport mechanism.Item Features of Anomalous Small of Strain Coefficient(Sumy State University, 2013) Kuz’menko, A.P.; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Проценко, Іван Юхимович; Проценко, Иван Ефимович; Protsenko, Ivan Yukhymovych; Ryapolov, P.A.; Shumakova, M.O.; Tyschenko, K.V.The analysis of one of the neglected problem of strain effect – causes observation anomalous small longitudinal strain coefficient (l). It is concluded that the value of l < 3 units will take place in the case where in the quasi elastic or plastic deformation Poisson coefficient is more than 0.5. Discussed possible reasons for this increase. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35178Item Electrophysical, Magnetoresistivity and Magneto-optical Properties of Multilayer Materials Based on Nanocrystalline and Amorphous Films(Sumy State University, 2012) Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Пилипенко, Олександр Валерійович; Пилипенко, Александр Валериевич; Pylypenko, Oleksandr Valeriiovych; Ткач, Олена Петрівна; Ткач, Елена Петровна; Tkach, Olena Petrivna; Власенко, Олександр Володимирович; Власенко, Александр Владимирович; Vlasenko, Oleksandr Volodymyrovych; Saltykova, A.I.; Nepijko, S.In work is presented to the results of complex investigate of phase formation, thermal resistivite, magnetoresistive and magneto-optical properties of multilayers based Fe and Pd, Ag or Ge, which obtained by sequential condensation of the layers with following thermal annealing. Investigation of phase formation processes of thin film systems and established of correlation between this processes and above-mention physical properties. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35009Item Magneto-deformation effect in double-layer nanodimentional film systems(Видавництво СумДУ, 2011) Чорноус, Анатолій Миколайович; Чорноус, Анатолий Николаевич; Chornous, Anatolii Mykolaiovych; Однодворець, Лариса Валентинівна; Однодворец, Лариса Валентиновна; Odnodvorets, Larysa Valentynivna; Проценко, Іван Юхимович; Проценко, Иван Ефимович; Protsenko, Ivan Yukhymovych; Проценко, Сергій Іванович; Проценко, Сергей Иванович; Protsenko, Serhii Ivanovych