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Information × Registration Number 0223U001974, 0121U109049 , R & D reports Title Магнітоплазмонні наноструктури для застосування в галузях біосенсорики і нанофотоніки popup.stage_title Head Kravets Anatolii F., Доктор фізико-математичних наук Registration Date 06-02-2023 Organization Institute of Magnetism NAS of Ukraine and MES of Ukraine popup.description2 The dynamics of standing spin waves in lattices of elliptical nanodisks (the size of which is less than 100 nm) of synthetic antiferromagnets (SAF) were studied. A detailed analysis of the ferromagnetic resonance (FMR) spectra of such structures in combination with micromagnetic modeling was performed and several notable features of such systems were revealed. It is shown that one broad FMR line is the only resonant response for SAF of the considered sizes. It was demonstrated that this mode is degenerate, and its excitation map resembles a superposition of oscillations at the center and at the edge of elliptical nanodiscs. It is shown that this hybrid excitation leads to an almost two-fold enhancement of the mode anisotropy caused by the shape of the elliptical nanodisks. The developed structures can be used in magnonics and nanophotonics devices as magnetoactive elements. An approach to local control of the Néel vector orientation in a collinear metallic antiferromagnet Mn2Au by combining deformation and excitation with femtosecond laser pulses has been developed. To achieve the switching, an external mechanical strain was applied that was large enough to induce an additional 2-fold anisotropy, but not strong enough to induce a depinning transition in the collinear antiferromagnet at room temperature. By irradiating the sample with a train of femtosecond laser pulses, we managed to locally align the Néel vector in two orthogonal orientations, with the direction controlled by the direction of the applied tensile strain; that is, stable states "0" and "1" were realized on the same film. This approach allows for selective/local control of the Néel vector axis with a spatial resolution that can be reduced to the subwavelength using near-field approaches. Given the fact that the resulting state is stable at room temperature and insensitive to magnetic fields up to a few tens of Tesla, the combination of global strain modulation and local ultrafast Néel vector manipula  Product Description popup.authors Borynskiy Vladyslav Yu. Vasilenko Petro S. Samorskiy Vladislav O. Krаvets Anаtolii F. Kuzmak Orest M Kuts Viktor O. Nevdacha Vitaliy V. Pohorilyi Anatolii M. Tovstolytkin Оlexandr Іvanovich Yaremkevich Dmеtro D popup.nrat_date 2023-02-06 Close