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Information × Registration Number 0222U001269, 0119U100469 , R & D reports Title Interparticle interactions and dissipative processes in systems of nanoscale magnetics and composites on their basis. popup.stage_title Head Tovstolytkin Oleksandr I., Доктор фізико-математичних наук Registration Date 26-01-2022 Organization Institute of Magnetism NAS of Ukraine and MES of Ukraine popup.description2  Effect of zinc substitution on magnetic properties and AC heating characteristics of Ni1-xZnxFe2O4 (x = 0 – 1) as well as (La,Sr)MnO3 nanoparticles with substitutions in manganese and lanthanum sublattices has been studied. It is shown that the increase in substitution level in LSMO (for both Fe and Sm substitutions) results in lowering the Curie temperature TC and weakening heating efficiency under the action of AC magnetic field. Characteristic features of the transformation of magnetic and resonance parameters of nanostructured composites upon a change in the content of magnetic component and measurement temperature have been determined. It is shown that the behavior of the samples with a low content of magnetic material is governed by a shape anisotropy of isolated nanomagnets, while those with a high content – shape anisotropy of a sample as a whole. Massive samples of barium hexaferite were obtained by sintering the synthesized BaFe12O19 powder. The magnetic properties of massive samples of barium hexaferite have been studied using the ferromagnetic resonance method. A method to synthesize nanosize particles of Y3AlFe4O12 garnet ferrite by precipitation in aqueous solutions at constant pH during the synthesis has been demonstrated. Synthesized precipitates are established to be amorphous and crystalline nanoparticles are formed in one stage after the treatment at 800 °C. The average particles size is around 60–70 nm. The ceramics obtained after a proper heat treatment of the nanoparticles is shown to be characterized by the high density and good electrophysical properties. Product Description popup.authors Krаvets Anаtolii F. Kuzmak Orest M Lytvynenko Yaryna M. Nevdacha Vitaliy V. Pogorily А. М. Polishchuk Dmytro M. Tovstolitkin A. І. popup.nrat_date 2022-03-09 Close