Magnetic anisotropy and magnetoelastic properties of Fe10Ni90 films

This work is devoted to studying the effect of the thickness and type of the buffer sublayer on the magnetic anisotropy and the magnetoelastic properties of Fe10Ni90 films. It is established that the anisotropy of Fe films strongly depends on thickness, which can be associated with the influence of several mechanisms of anisotropy formation. Measurements of the magnetostriction of thin films using magnetoresistive curves were made. The value of the magnetostriction constant also depends on the thickness of the films. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-72-10044This work was financially supported by the Russian Science Foundation (RSF), project No. 18-72-10044

MAGNETIC HYSTERESIS PROPERTIES OF Tb-Co MULTILAYERED FILMS

The hysteresis properties of [Tb-Co/Ti]n and [Tb-Co/Si]n multilayered films were studied. The value of the coercive force and its temperature dependence strongly change with a de-crease of the Tb-Co layer thickness.This study was supported by the Ministry of Science and Higher Education of the Russian Federation (project No. FEUZ-2020-0051)

Magnetocaloric effect in TbCo-based multilayers

TbCo-based magnetic multilayers with different thicknesses of Tb-Co layers and non-magnetic spacers (Ti, Si) have been prepared by sputtering. The structure and magnetocaloric properties of these samples have been investigated. The peak value of magnetic entropy change in TbCo-based multilayers is smaller than the one previously reported for bulk counterparts. Nanostructuring leads to a table-like temperature dependence of the magnetic entropy change. It has been shown that the material of non-magnetic spacers can have a noticeable effect on magnetocaloric properties of TbCo-based magnetic multilayers. © Published under licence by IOP Publishing Ltd.Russian Foundation for Basic Research, RFBR: 17-02-00236-aELKARTEK ACTIMAT-3 (2018-19) KK-2018/00099This work was supported by RFBR grant 17-02-00236-a of Russian Federation and by ELKARTEK ACTIMAT-3 (2018-19) KK-2018/00099 grant of the Basque Country Government

Synthesis of lanthanum manganite powders via combustion reactions: some aspects of the influence of magnetic field and charge generation in precursors on the formation of properties

The mutual influence of the process of electric charge generation in nitrate organic precursors and a constant external magnetic field on the magnetic properties formation was considered for lanthanum strontium manganite La0.7 Sr0.3 MnO3±y powders obtained via combustion reactions. The investigated properties of the obtained samples include hysteresis, magnetocaloric and magnetoresistive effects. The correlation between formation process of extended ensembles of nanoparticles and the functional properties of complex oxide materials was also discussed. The manifestation of a strong magneto-gas-selective effect has been ob-served during the combustion of precursors in a constant magnetic field, which affects the charge generation process. © Ostroushko A.A., Gagarin I.D., Kudyukov E.V., Zhulanova T.Yu., Permyakova A.E., Russkikh O.V., 2023.Russian Science Foundation, RSF: 22-23-00718ABSTRACT The mutual influence of the process of electric charge generation in nitrate organic precursors and a constant external magnetic field on the magnetic properties formation was considered for lanthanum strontium manganite La0.7Sr0.3MnO3±y powders obtained via combustion reactions. The investigated properties of the obtained samples include hysteresis, magnetocaloric and magnetoresistive effects. The correlation between formation process of extended ensembles of nanoparticles and the functional properties of complex oxide materials was also discussed. The manifestation of a strong magneto-gas-selective effect has been observed during the combustion of precursors in a constant magnetic field, which affects the charge generation process. KEYWORDS complex oxides, lanthanum manganite, synthesis, combustion reactions, nitrate-organic systems, nanoparticles, charges generation, magnetic properties, magneto-gas selective effect ACKNOWLEDGEMENTS The research was financially supported by a grant from the Russian Science Foundation (Project No. 22-23-00718). The research was carried out using the equipment of the Ural Center for Collective Use “Modern Nanotechnologies”

Negative anisotropy in Fe10Ni90 films

It is shown that in the Fe10Ni90 film the easy magnetization axis can be formed not along the deposition field, as it occurs in the Fe19Ni81 film, but across, that is a "negative anisotropy" effect occurs. A model that qualitatively describes this effect is proposed. Using the Kerr magnetometer, local measurements of the variation of the direction of the easy magnetization axis over the area of the film sample Fe10Ni90 were carried out and compared with the general view of the domain structure. © Published under licence by IOP Publishing Ltd

Magnetism of amorphous Dy-Tb-Co-type films

In this work a systematic study of magnetic properties of amorphous TbxCo100-x and DyxCo100-x films is presented. In a composition range 15 < x < 40 at. %, temperature dependencies of spontaneous magnetization in a temperature interval 5 - 300 K as well as low-temperature 5 K hysteresis loops in magnetic field up to ±70 kOe have been obtained. We demonstrated, that the experimental results can be interpreted in a framework of a model considering a variable sperimagnetic cone angle of rare earth atoms up to 150. A series of Tb-Dy-Co films with a composition close to Laves phase has been obtained. We demonstrated that the variation of rare earth content with Co content fixed does not lead to a systematic lowering of magnetic hysteresis. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-72-10044This work was financially supported by the Russian Science Foundation (RSF), project No. 18-72-10044

MICROMAGNETIC MODELING OF TENSOMAGNETORESISTANCE EFFECT IN FILMS WITH UNIDIRECTIONAL ANISOTROPY

The work is devoted to a micromagnetic modeling of magnetoresistance under compressive stress in multi-layer films with unidirectional anisotropy.Работа выполнена при финансовой поддержке Минобрнауки России, проект RFMEFI57815X0125

SYNTHESIS AND ATTESTATION OF FUNCTIONAL LAYERS FOR COMPOSITE MULTIFERROICS

This work is devoted to the synthesis and attestation of the magnetic and piezoelectric properties of Fe-Ni, Fe-Co, and PVDF films for composite muliferroics

EXPERIMENTAL INVESTIGATION OF Co MAGNETISM IN AMORPHOUS Y-Co FILMS

A systematic analysis of the dependence of the atomic magnetic moment of cobalt films of the binary Y-Co system on the content of yttrium is given. There is a qualitative agreement of the course of this dependence with the results previously obtained in the study of the La-Co and Gd-Co systems.Работа выполнена при поддержке Российского научного фонда, проект № №24-22-00173

MICROSTRUCTURE, MAGNETIC AND MAGNETORESISTIVE PROPERTIES OF Co-Cu FILMS

This work is devoted to the study of the microstructure, magnetic and magnetoresistive properties of CoxCu100-x composite films. Depending on the cobalt content, a negative and positive magnetoresistance was detected. An explanation for these results is given.Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 16-32-00327 мол а