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Information × Registration Number 0221U106000, 0121U111274 , R & D reports Title The development of physical principles of magnetic nanoelectronics popup.stage_title Head Ivanov Borys O., д.ф.-м.н. Registration Date 21-09-2021 Organization Institute of Magnetism NAS of Ukraine and MES of Ukraine popup.description2  Approaches and methods of nanophysics were applied to antiferromagnets with weak ferromagnetism using the original discrete version of the nonlinear sigma model. Complex studies of magnetic and resonant properties of nanostructures were carried out. An almost universal method of excitation of coherent propagating spin waves in antiferromagnetic insulators using optical pumping of electronic transitions above the band gap was proposed. The possibility of influencing the interaction of magnon modes in a magnetic nanoelement is demonstrated. The possibility of a controlled increase at least by an order of magnitude of the efficiency of threemagnon interaction was shown. An inverse magnetocaloric effect below the phase transition temperature was analyzed using the Landau theory for phase transitions. A temperature shift under the action of a magnetic field was evaluated and a dependence of the phase transition field on temperature was calculated. The entropy change caused by the magnetic field and the cooling capacity of the Fe49Rh51 alloy was derived. Product Description popup.authors Ivanov Boris О. Verba Roman V. Golub Volodymyr O. Kosogor G. O. popup.nrat_date 2021-09-21 Close