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Information × Registration Number 0225U001344, (0122U001610) , R & D reports Title Features of formation of ordered FePd and FePt(Pd) nanostructures - functional elements of spintronics, sensorics, magnetic recording of information popup.stage_title Особливості формування впорядкованих наноструктур FePd та FePt(Pd) - функціональних елементів спінтроніки, сенсорики, магнітного запису інформації Head Makohon Yurii M., д.т.н. Registration Date 30-01-2025 Organization National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» popup.description1 Establishment of regularities and development of scientific bases of hydrogen heat treatment application for formation of ordered FePd and FePt(Pd) nanostructures - functional elements of spintronics, sensorics, magnetic recording of information popup.description2   Scientific principles for controlling the kinetics of ordering processes at the nanoscale have been established. Mechanisms of structural-phase transformations have been established for controlling the phase composition, magnetic states, and properties of nanoscale films based on FePd and FePt(Pd). Annealing in hydrogen significantly affects the acceleration of the A1 → L10 ordering process and the magnetic properties of equiatomic Fe50Pd50 films compared to vacuum. During heat treatment in hydrogen at temperatures of 300 °C – 700 °C, a reversible change in magnetic states and magnetic properties of FePd films occurs twice, which is due to the simultaneous change in the phase composition and electronic structure during the ordering process. By varying the duration and temperature of annealing in hydrogen, due to its reversible effect on magnetism in FePd(5nm)-based films, the magnetic state can be changed after cooling: soft magnetic ferromagnet → paramagnet → hard magnetic ferromagnet → paramagnet. Ag doping does not affect the nature of the change in magnetic states. The advantages of the SERS method for studying the dynamics of structural and magnetic changes in FePd films during the ordering process are shown. Practical recommendations for the implementation of ordered FePd and FePt(Pd) nanostructures have been developed. Hydrogen-induced change of magnetic states, layer-by-layer deposition of layers with different magnetic states but with the same chemical composition, can be used in the development of field-free spintronics devices, spin transistors based on multilayer thin-film nanostructures with a giant magnetoresistive effect, in the formation of thin films as a medium for magnetic recording and information storage of increased speed, density and stability, in hard disk reading technologies. Product Description popup.authors Balakhonova Nataliia O. Barabash Maksym Yu. Verbytska Tetiana I. Makohon Yurii M. Natalenko Maryna Yu. Pedan Roman V. Sysoiev Maksym O. Shkarban Ruslan A. popup.nrat_date 2025-01-30 Close