Physics of the Solid State
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Homogenization annealing and magnetic properties of a sample of the Laves phase GdNi2
Mashirov A.V.
1, Musabirov I. I.
2, Anikin M. S.3, Semkin M. A.3, Mitsiuk V. I.
4, Gaifullin R. Y.
5, Koledov V. V.1, Shavrov V. G.1
1Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
2Institute of Metal Superplasticity Problems, Russian Academy of Sciences, Ufa, Bashkortostan, Russia
3Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
4Scientific and Practical Materials Research Center, National Academy of Sciences of Belarus, Minsk, Belarus
5Bashkir State University, Ufa, Russia
2Institute of Metal Superplasticity Problems, Russian Academy of Sciences, Ufa, Bashkortostan, Russia
3Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
4Scientific and Practical Materials Research Center, National Academy of Sciences of Belarus, Minsk, Belarus
5Bashkir State University, Ufa, Russia
Email: a.v.mashirov@mail.ru, irekmusabirov@mail.ru, maksim.anikin@urfu.ru, m.a.semkin@urfu.ru, vmitsiuk@gmail.com, gaifullin_1998@bk.ru, victor_koledov@mail.ru, shavrov32@mail.ru
The paper shows the effect of homogenization annealing on the ferromagnet-paramagnet phase transition in the GdNi2 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 GdNi2 sample. The value of the isothermal change entropy Delta Sm=-18.931 J/(kg·K) for an annealed sample of the GdNi2 alloy at the Curie point of 75 K in a magnetic field of 13.5 T. Keywords: magnetocaloric effect, GdNi2, Laves phases.
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