Issues

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2021

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vol. 19 /

Issue 2

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O. I. Dmitriev, A. M. Kasumov, V. M. Karavaeva, K. O. Vyshnevska, L. I. Fiyalka, K. A. Korotkov, A. I. Ievtushenko
«Magnetic Properties of 3d-Metal-Based Nanofilm-Structures’ Interfaces»
0231–0238 (2021)

PACS numbers: 75.30.Et, 75.47.-m, 75.50.-y, 75.70.Cn, 75.75.Cd, 76.50.+g, 78.20.Ls

The experimental and theoretical aspects of increasing the effective magnetic moment for nanofilm structures based on 3d-metals (Fe, Co, Ni) in the different combination are analysed. The magnetic properties of nanofilm structures of d-metal (Fe, Co, Ni)/f-metal are affected by the d/f interaction in their interface. In the case of d-metal/REM-oxide nanostructures, an indirect exchange d/f interaction (superexchange through oxygen) is likely to play a role because of hybridization of the d-metal orbitals with the f-metal orbitals by means of the participation of oxygen orbitals in the interface. However, the concept of the theory of induced surface magnetic vacancies is not excluded. The question of which of these mechanisms most strongly affects the magnetic properties needs further elaboration. In nanostructured films from Fe, Co, Ni and non-magnetic films such as diamagnetic metals (Cu, Ag, Au), paramagnetic metal (Pd) or polymer polyethylene terephthalate (PET), the effect of increasing the magnetic properties of the systems is also experimentally revealed. However, d/f interaction in these systems is not possible. The effect of increasing the magnetic properties of such systems can be explained by the additional surface induction of magnetism by impurities and vacancies. In all these cases, the main role belongs to the interface states of structures.

Keywords: d/f interaction, nanofilm structures, diamagnetic, paramagnetic, magnetic vacancies, interface

https://doi.org/10.15407/nnn.19.02.231

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