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

Effect of the thickness and tungsten alloying of Cr–Mn antiferromagnetic layers on the microstructure and hysteresis properties of Cr–Mn/FM type films (FM = Fe, Fe$_{20}$Ni$_{80}$, Fe$_{10}$Co$_{90}$, Fe$_{60}$Co$_{20}$B$_{20}$)

A. A. Feshchenko^a, M. E. Moskalev^a, A. A. Yushkov^a, S. V. Semenova^a, V. N. Lepalovskij^a, E. A. Kravtsov^ab, V. O. Vasil'kovskii<sup>ab

a</sup> Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
^b Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: The patterns of changes in the coercive force and the exchange bias field of a number of iron-containing ferromagnetic layers FM = Fe, Fe$_{20}$Ni$_{80}$, Fe$_{10}$Co$_{90}$, Fe$_{60}$Co$_{20}$B$_{20}$ в составе пленок типа Cr$_{70}$Mn$_{30}$/FM films have been determined with varying thickness of the Cr$_{70}$Mn$_{30}$ antiferromagnetic layer and its doping W. The interpretation of the results obtained is based on the low stability of the magnetic state of the crystallites composing the antiferromagnetic layer. It is shown that it can be increased due to an increase in the volume of crystallites with an increase in the thickness of the antiferromagnetic layer. In this case, the final result largely depends on the specifics of the interlayer exchange interaction between the antiferromagnetic layer and ferromagnetic layers of various compositions. It was also found that the introduction of W weakens the magnetic anisotropy of the Cr–Mn antiferromagnetic layer, but has a positive effect on the reproducibility of the hysteresis properties of film composites.

Keywords: antiferromagnet, ferromagnet, layering, composition, texture, thickness, temperature, coercive force, exchange bias, alloying.

Received: 06.03.2025
Revised: 06.03.2025
Accepted: 05.05.2025

DOI: 10.61011/FTT.2025.06.60962.19HH-25

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