Magnetism

Temperature dependence of magnetic properties and magnetic field behavior of Co/Gd/Co thin-film three-layer systems

A. M. Kharlamova^a, A. V. Makarov^a, A. V. Svalov^b, E. E. Shalygina<sup>a

a</sup> Lomonosov Moscow State University, Moscow, Russia
^b Ural Federal University named after the First President of Russia B. N. Yeltsin,Yekaterinburg, Russia

Abstract: The temperature dependences of magnetic properties and magnetic field behavior of Co/Gd/Co thin-film three-layer systems obtained via ion-plasma magnetron sputtering are studied. The thickness of cobalt layers is 5.0 nm and of Gd layers ($t_{\mathrm{Gd}}$) varies from 3.0 to 10.0 nm. The bulk magnetic characteristics of the samples were measured on a vibration magnetometer with an external magnetic field oriented parallel to the plane of the samples. The influence of the temperature and the thickness of a Gd layer on the shape of the hysteresis loops, the values of the magnetic moment $m$ and the coercive force $H_C$ are discovered. In particular, when the temperature changes from 100 to 300 K, the coercive force decreases, and the magnetic moment increases at a temperature above 150 K. The $m$ value decreases with an increase in thickness of gadolinium.

Keywords: magnetic properties, magnetic field behavior, low-temperature measurements, rare earth metals, thin-film structures.

Received: 03.06.2021
Revised: 03.06.2021
Accepted: 03.06.2021

DOI: 10.21883/FTT.2021.10.51402.136

 English version: Physics of the Solid State, 2021, 63:11, 1662–1669

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