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Fizika Tverdogo Tela, 2022 Volume 64, Issue 9, Pages 1304–1310 (Mi ftt11131)

This article is cited in 1 paper

XXVI International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 14 - March 17, 2022
Magnetism

Formation of skyrmion states in ion-irradiated CoPt thin films

I. L. Kalentyevaa, O. V. Vikhrovaa, Yu. A. Danilova, A. V. Zdoroveyshcheva, D. A. Zdoroveishcheva, M. V. Dorokhina, Yu. A. Dudina, M. P. Temiryazevab, A. G. Temiryazevb, A. V. Sadovnikovcd, P. A. Yunine

a Scientific-Research Physicotechnical Institute at the Nizhnii Novgorod State University, Nizhny Novgorod, Russia
b Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences, Fryazino, Moscow oblast, Russia
c Laboratory of Magnetic Metamaterials, Saratov State University, Saratov, Russia
d Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, Moscow, Russia
e Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia

Abstract: The possibilities of controlled exposure to ion irradiation (He$^+$ with an energy of 20 keV and a fluence in the range from 3$\cdot$10$^{14}$ to 3$\cdot$10$^{15}$ cm$^{-2}$) as a method for modifying the magnetic properties and domain structure of Co$_{0.35}$Pt$_{0.65}$ thin ferromagnetic films have been studied. It was found that the ion irradiation causes a change in the Dzyaloshinskii–Moriya interaction constant and a change in the skyrmion density that correlates with it. This result shows the possibility of homogeneous ion irradiation as a way to control the micromagnetic structure, namely the process of formation of skyrmion states.

Keywords: ferromagnetic thin films, ion irradiation, domain structure, magnetic force microscopy, Dzyaloshinskii–Moriya interaction, skyrmions.

Received: 29.04.2022
Revised: 29.04.2022
Accepted: 12.05.2022

DOI: 10.21883/FTT.2022.09.52824.27HH



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