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Magnetocaloric effect in powder of GdTbDyHoEr high-entropy alloy
Svalov A. V.
1, Neznakhin D. S.1, Arkhipov A. V.1, Andreev S. V.1, Yushkov A. A.1, Rusalina A. S.1, Kurlyandskaya G. V.
1
1Institute of Natural Sciences and Mathematics, Ural Federal University named after the First President of Russia B. N. Yeltsin, Yekaterinburg, Russia
Email: andrey.svalov@urfu.ru, galinakurlyandskaya@urfu.ru
The paper presents the results of studying the structural, magnetic and magnetocaloric properties of the powder of GdTbDyHoEr high-entropy alloy obtained by ball milling a rapidly quenched nanocrystalline ribbon of this alloy. When the temperature and external magnetic field change, a magnetic phase transition between a helical antiferromagnet and ferromagnet occurs in the powder. The change in the magnetic entropy Δ SM was determined based on the Maxwell relation from the magnetic isotherms data. The maximum value of Δ SM is observed at a temperature of 178 K and for a magnetic field change amplitude of 9 T it is 12.1 Jkg-1·K-1. Keywords: high entropy alloy, crystal structure, magnetic phase transitions, magnetocaloric effect, refrigerant capacity.
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