Registration Number
0218U003525,
0115U003536
, R & D reports
Title
Development and study of magnetic and magnetoelectric elements of devices on the hasis of multilayered composite ferrite- piezoelectric structures
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Head
Dzhezherya,
Registration Date
02-03-2018
Organization
Institute of magnetism NASU and MESU
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The final Report of the Research Work, "Development and research of magnetic and magnetoelectric elements of devices based on multilayer composite ferrite-piezoelectric structures", consists of the Introduction, three Sections, Conclusions and References. In the first Section, the inhomogeneous magnetic configurations and their influence on the dynamic properties of ferromagnetic films with spatially modulated parameters are considered and determined by the methods of theoretical physics. In particular, on the basis of the Landau-Lifshitz magnetization dynamics equations, the peculiarities of the formation of the interphase boundary at the conditions of the spatial modulation of the anisotropy constant on the thickness of the film are described. The resonance of the oscillations of this boundary in an alternating magnetic field is investigated. It is shown that the resonance phenomena take place in the narrow field range and are very sensitive to the direction of the external magnetic field. Taking into account the indicated properties of magnetic films with modulated anisotropy, the pattern of a magnetoelectric modulator which converts the magnetic field oscillations directly to electric field oscillations in the low-frequency range was constructed. Two patent applications are filed. The second Section is devoted to the study of the magneto-mechanical properties of the shape memory materials. The purpose of the investigations was the study of the dependences of magnetic and mechanical characteristics of the alloy on the basis of Cu-Al-Mn on the effect of the previous thermomagnetic processing (TMP) during the formation of a system of nanosized magnetic particles. These materials are considered as the basis of functional elements for the creation of magnetoelectric modulator. The deformation behavior of Fe-Ni-Co-Ti-based memory alloys for different thermomechanical deformation regimes, which can act as independent control systems due to their unique physical and mechanical properties, is determined. They are quite capable of becoming the basis for use as possible dampers or actuators of various devices. In the third Section, the features of localized states of nonlinear waves in media with two identical traps or defective layers, which are simulated by rectangular potential wells, depending on the linearity/nonlinearity of media in potential wells and in areas outside them, are investigated. The exact solutions for all possible cases are found, and the character of the localization of nonlinear stationary waves is determined. The obtained results can be useful in the study of nonlinear localized states in systems with defects/interfaces in many areas of modern physics, in particular, in the study of magnetic layered media.
Product Description
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І.В. Герасимчук
А.М. Тітенко
А.О. Хребтов
В.В. Кокорін
Д.П. Азарх
Л.Є. Козлова
С.В. Черепов
С.М. Коноплюк
Ю.І. Джежеря
Ю.С. Семенова
Я.В. Коренівська
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2020-04-02
