Magnetic properties of GdCo-Al2O3 composite films

The purpose of this work was to synthesize and study magnetic properties of composite films consisting of Gd-Co ferrimagnetic system and Al2O3 dielectric matrix. GdCo-Al2O3 films of different composition were synthesized by magnetron co-sputtering of Gd, Co, and Al2O3 targets in an Ar atmosphere. Investigation of magnetic properties was carried out using a vibrating sample magnetometer in the temperature range from 10 to 300 K. The obtained results showed that in the composite system with a volume of dielectric material exceeding 50% a superparamagnetic state is realized, indicating granular microstructure. In this case, the granules show signs of ferrimagnetic ordering. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-72-10044This work was financially supported by the Russian Science Foundation in the framework of research project No. 18-72-10044

HYSTERESIS PROPERTIES AND MAGNETIZATION REVERSAL IN FeMn/FM (FM=Co, Fe, Ni, FeNi) FILMS WITH EXCHANGE BIAS

Angular dependencies of hysteresis properties of various ferromagnetic layers exchange coupled to a pinning antiferromagnetic layer have been investigated experimentally. The re-sults have been interpreted and analyzed in detail using macrospin approximation and micro-magnetic simulation.This work was supported by the Russian Science Foundation (project No 19-72-00141)

EFFECT OF THERMOMAGNETIC TREATMENT ON ANISOTROPY OF HYSTERESIS PROPERTIES OF Ni THIN FILMS

The effect on magnetic properties of competitive types of anisotropy - a structural anisotropy and a magnetoelastic anisotropy has been observed in thin nickel-based films. In this work analysis was carried out to the observed complex magnetic anisotropy depending on a thermomagnetic treatment.Работа выполнена при поддержке Минобрнауки РФ, проект FEUZ 2023 -0020

Magnetic properties of Co-W thin films

In this paper, the magnetic properties and structure of the Co-W films of different compositions prepared by magnetron sputtering on glass substrates without and with Ta or Ru buffer layers were investigated. The dependences of coercive force on the W content for the studied films were non-monotonic. The peak value of the coercive force of about 400 Oe was observed for the films on glass and Ta layers with W content of 8-9 at. %. The films deposited on Ru layers had a coercive force of 4 times less, and it was practically independent of the W content in a wide range from 6 to 20 at. %. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 18-72-10044This work was carried out under the financial support by the RSF grant, project No. 18-72-10044

THE FEATURES OF THE DOMANE STRUCTURE OF FeMn/Fe20Ni80/Co-Al2O3/Fe20Ni80 MULTILAYERS

In this work we investigated influence of the composition and thickness of the Co-Al2O3 spacer on the interlayer coupling in FeMn/Fe20Ni80/Со-Al2O3/Fe20Ni80 multilayers. It was shown that the antiparallel orientation of the magnetization in the exchange coupled permalloy sublayers is accompanied by the formation of volumetric magnetic inhomogeneity, which can be interpreted as a ripple of magnetization.Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 16-32-00327 мол_а

Synthesis and Magnetic Properties of 3D Transition Metals and Alloys Nanowires in Thin-Film Aluminum Oxide Film

Synthesis method of magnetic Ni, Co, Fe-Ni and Fe-Co nanowires in thin Al film. Analysis properties confirmed strong shape anisotropy and absent of significant oxidation of magnetic material. The proposed synthesis method allows for adding electrical contacts to both surfaces of the nanowire array.Работа выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации, тема № FEUZ-2020-0051

TEMPERATURE CHARACTERISTIC OF MAGNETIC HYSTERESIS OF FE LAYERS IN FILM STRUCTURES BASED ON ANTIFERROMAGNET Cr80Mn20

The article discusses the magnetic properties of Ta/Cr 80 Mn 20/Fe/Ta and Ta/Fe/Cr 80 Mn 20/Fe/Ta films. The temperature dependences of a number of parameters of the hysteresis loops of the ferromagnetic layer in the studied films are obtained.Работа выполнена при финансовой поддержке РНФ, грант №22-22-00814

Exchange Bias Effect in FeMn/FeNi films: Experiment and Micromagnetic Simulation

Temperature dependencies of exchange bias field in FeNi/FeMn(L)/FeNi films with different thicknesses (L) of antiferromagnetic FeMn layers are investigated in two variants fields, namely «positive» field, and «negative» field. Our results show exchange bias effect depends on the cooling field. Exper.Работа выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации, тема № FEUZ-2020-0051

INFLUENCE OF THE PINNING LAYER THICKNESS ON EXCHANGE BIAS IN FeNi/FeMn/FeNi FILMS

Temperature dependencies of exchange bias field and coercivity in FeNi/FeMn/FeNi films with different thicknesses of antiferromagnetic FeMn and top FeNi layers are investi-gated. Experimental results are interpreted using micromagnetic simulation performed on a polycrystalline multilayer model.Работа выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации, тема № FEUZ-2020-0051