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Information × Registration Number 0211U005482, 0111U006758 , R & D reports Title Magnetic and magneto-acoustic effects in weak ferromagnets and ferrites popup.stage_title Head Berzhansky Vladimir Naumovich, Registration Date 15-12-2011 Organization National Taurida V. Vernadsky University popup.description2 Goal of the work: the main goal was development of the theory and modeling of excitation and transformation of modes during magnetoelastic resonance in FeBO3. Tasks: theoretical analysis of the modes excitation and multiphonon states phenomena in FeBO3. Experimental and theoretical research of the phenomena of magnetoelastic modes transformation. Object of research: magnetoelastic phenomena in antiferromagnets with "easy plane" anisotropy and with weak ferromagnetism. Subject of research: nonlinear magnetoacoustics, excitation of magnetoelastic resonance modes. Methods of research: theoretical modeling, original research method of magnetoelastic resonance modes excitation. Main results: the possibility of magnetic and non-magnetoc modes hybridization in corresponding magnetic fields and on corresponding frequencies was shown with the help of developed theory of size resonance in iron borate crystals with induced anisotropy. Hybridization is accompanied by the change of interacting modes amplitude if the magnetic field is changed. This effect is observed experimentally with both magnetic and elastic excitation of of magnetoelastic oscillations. Anharmonic theory is developed that described of multi-quasiphonon states excitation in easy plane antiferromagnet. The nature of supercritical dynamics limitation mechanism is determined. This mechanism is connected with cubic nonlinearity nonlinearity. The limitation compensation method is suggested. Application of this method allowed modeling of supercritical dynamics with high levels of supercriticality. Product Description popup.authors Євстаф'єв Олександр Іванович Бержанський Володимир Наумович Ляшко Наталія Василівна Максимова Олена Михайлівна Полулях Сергій Миколайович Попов В'ячеслав Валерійович Постивєй Наталія Сергіївна Скібінський Костянтин Михайлович Стругацький Марк Борисович Хренов Олександр Яковлевич Ягупов Сергій Володимирович popup.nrat_date 2020-04-02 Close