Magnetocaloric effect in R${}_5$Si${}_4$ (R = Tb, Dy, Ho) alloys

M. V. Utarbekova ; M. A. Orshulevich ; D. Bataev ; A. G. Fazlitdinova ; S. V. Taskaev

Čelâbinskij fiziko-matematičeskij žurnal, Tome 9 (2024) no. 4, pp. 670-681.

Résumé

Experimental studies of the structural, magnetic and magnetocaloric properties of polycrystalline alloys Tb${}_5$Si${}_4$, Dy${}_5$Si${}_4$, Ho${}_5$Si${}_4$ in external magnetic fields up to 3 T have been carried out, and changes in the magnetic part of the entropy in higher fields of 20 T generated by superconducting magnetic systems have been calculated. Magnetic measurements have shown that these compounds have a low coercive force and reach saturation in small fields. It has been established that the magnetocaloric effect in the studied compounds is observed in a wide temperature range, and for intermetallides Tb${}_5$Si${}_4$, Dy${}_5$Si${}_4$, Ho${}_5$Si${}_4$ has several areas of existence comparable in magnitude of the effect. The presence of several intervals of the existence of the magnetocaloric effect is caused by a series of magnetic phase transitions in these ferrimagnetic compounds.

Détail

Mots-clés : magnetocaloric effect, magnetic cooling, natural gas liquefaction, rare-earth metals and alloys.

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