XXIX International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 10-14, 2025
Magnetism, spintronics

The effect of platinum thickness on the magnetic properties of Pt/Co/CoO films

M. A. Kuznetsova, A. A. Turpak, A. V. Prikhodchenko, N. N. Chernousov, A. G. Kozlov

Far Eastern Federal University, Vladivostok

Abstract: The paper presents the results of an experimental study of thin magnetic Pt/Co/CoO/Pt films fabricated by magnetron sputtering with varying thicknesses of the bottom Pt layer. The main focus is on investigating the influence of the Pt underlayer thickness on the magnetic properties and morphology of the studied films. Magnetic characteristics (coercivity and anisotropy field) were examined using a vibrating sample magnetometer. The domain wall propagation velocity depending on the Pt thickness was studied using a Kerr magneto-optical microscope, and the Dlozyashinsky–Moriya interaction (DMI) constant was calculated based on measurements of domain wall dynamics I. It was demonstrated that with an increase in the Pt sublayer, the average grain size increases, which leads to an increase in the coercive force, magnetic anisotropy and, and magnetic moment in the studied films. The results of this work may be useful for utilizing the Pt/Co/CoO/Pt system as a basis for developing new data storage devices with tailored magnetic properties for applications in spintronics.

Keywords: perpendicular magnetic anisotropy, cobalt oxidation, spin-orbit interaction, X-ray reflectometry, domain structure, Dzyaloshinskii–Moria interaction.

Received: 06.03.2025
Revised: 06.03.2025
Accepted: 05.05.2025

DOI: 10.61011/FTT.2025.07.61188.5HH-25

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