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Information × Registration Number 0218U003422, 0117U006356 , R & D reports Title Spin dynamics and dissipative processes in nanostructured materials of ultrafast antiferromagnetic spintronics popup.stage_title Head Kravets A. Ivanov, Кандидат фізико-математичних наук Registration Date 09-02-2018 Organization Department for special training National academy of science of Ukraine at Kiev University popup.description2 Mechanisms of interaction of magnetization with electromagnetic signals of the terahertz frequency range in spin oscillators of Hall (COX) based on a metal film system with strong spin-orbit interaction / beveled antiferromagnet (AFM) are studied. It has been shown that the precession of magnetization in the AFM leads to the emergence of a strong dipole radiation that can be used to create practical miniature generators of terahertz radiation. According to an analysis made of this power is greater than 1 mW at a frequency of 500 GHz for the structure of hematite (?-Fe2O3) / platinum located in the dielectric resonator with dimensions of 470 mm ? 50 nm ? 97 mm, dielectric constant ? = 10 and Q = Q 750. A series of magnetic multilayer nanostructures Ta (5)/Py(3)/Mn80Ir20(12)/Cu(6)/Py (dFM) / Al (4) with a different thickness of the ferromagnetic layer (Py = Ni80Fe20) dFM = 3, 6, 9, 12, 15 nm were manufactured by the magnetron deposition. The method of ferromagnetic resonance (FMR) revealed that in such a system dynamic interlayer exchange due to spin pump in a nonmagnetic layer in the process of FMR is induced, which causes the appearance of an additional contribution to the magnetic damping constant of the system and leads to the expansion of the FMR line. This contribution is inversely proportional to the thickness of dFM. Product Description popup.authors . Артемчук П. . Слободянюк В. Кравець А.Ф. Малишев В. Мойсеєнко В. Поліщук Д.М. Полек Т.І. Прокопенко О.В. Сулименко О. Товстолиткін О.І. Шанідзе Р. Яремкевич Д.Д. popup.nrat_date 2020-04-02 Close