A. V. Mashirov, I. I. Musabirov, M. S. Anikin, M. A. Semkin, V. I. Mitsiuk, R. Y. Gaifullin, V. V. Koledov, V. G. Shavrov, “Homogenization annealing and magnetic properties of a sample of the Laves phase GdNi<nobr>$_2$</nobr>”, Fizika Tverdogo Tela, 2021, Volume 63, Issue 12,Pages <nobr>1994

XXI All-Russian School-Seminar on Condensed Matter Physics (SPFKS-21), Yekaterinburg, March 18-25, 2021
Magnetism

Homogenization annealing and magnetic properties of a sample of the Laves phase GdNi$_2$

A. V. Mashirov^a, I. I. Musabirov^b, M. S. Anikin^c, M. A. Semkin^c, V. I. Mitsiuk^d, R. Y. Gaifullin^e, V. V. Koledov^a, V. G. Shavrov^a

^a Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
^b Institute for Metals Superplasticity Problems of RAS, Ufa
^c Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
^d Scientific-Practical Materials Research Centre of NAS of Belarus
^e Bashkir State University, Ufa

Abstract: The paper shows the effect of homogenization annealing on the ferromagnet-paramagnet phase transition in the GdNi$_2$ alloy. In the cast sample, at the Curie point, a temperature hysteresis is observed, which in an external magnetic field of 13.5 T can be at least 3 degrees. The data of scanning electron microscopy of the electropolished samples showed a decrease in the impurity phase of GdNi and practically no temperature hysteresis of the phase transition in the annealed GdNi$_2$ sample. The value of the isothermal change entropy $\Delta S_m=-$ 18.931 J/(kg$\cdot$K) for an annealed sample of the GdNi$_2$ alloy at the Curie point of 75 K in a magnetic field of 13.5 T.

Keywords: magnetocaloric effect, GdNi$_2$, Laves phases.

Received: 08.07.2021
Revised: 13.07.2021
Accepted: 16.07.2021

DOI: 10.21883/FTT.2021.12.51655.13s