Magnetism, spintronics

X-ray and calorimetric studies of the GdMn$_2$(Ge$_{1-x}$Si$_x$)$_2$ compounds

L. A. Stashkova^a, A. M. Bartashevich^ab, P. B. Terentev^ab, V. S. Gaviko^ab, E. G. Gerasimov^ab, N. V. Mushnikov<sup>ab

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

Abstract: X-ray diffraction and differential scanning calorimetry have been used to study changes in the lattice parameters and Neel temperature of the compounds GdMn$_2$(Ge$_{1-x}$Si$_x$)$_2$ ($x$ = 0–1) with increasing Si content. It is shown that substitution of Ge by Si leads to an 8% decrease in the unit cell volume of the compounds at room temperature. It is found that the Neel temperature of the compounds increases with increasing Si content from 365 K at $x$ = 0 to 465 K at $x$ = 1. The magnetic phase diagram of the system GdMn$_2$(Ge$_{1-x}$Si$_x$)$_2$ is constructed according to the obtained data.

Keywords: rare-earth intermetallics, magnetic phase transitions, magnetic phase diagram, X-ray diffraction, differential scanning calorimetry.

Received: 07.05.2025
Revised: 09.05.2025
Accepted: 09.05.2025

DOI: 10.61011/FTT.2025.04.60550.96-25

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