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<p>Melt-spun ribbons of GdTbDyHoEr high-entropy alloy have a single-phase hexagonal-close-packed structure. The maximum value of the magnetic entropy change Δ<i>S</i><sub><i>M</i></sub> for this alloy after rapid quenching increases up to 8.6&#xa0;J kg<sup>− 1</sup> K<sup>− 1</sup> in the external magnetic field of 5 T at <i>T</i> = 180&#xa0;K, and the refrigerant capacity <i>RC</i> reaches 340&#xa0;J kg<sup>− 1</sup> in the external magnetic field of 2 T. The present analysis indicates that the higher values of the magnetic entropy change and the refrigerant capacity for the GdTbDyHoEr melt-spun ribbons are apparently due to their lower effective magnetic anisotropy in comparison with the bulk alloy and more intense response to an external magnetic field. The presented results indicate a way to obtain highly efficient materials for magnetic refrigeration applications.</p>

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Magnetic and magnetocaloric properties of melt-spun ribbons of GdTbDyHoEr high entropy alloy

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • A. V. Svalov,
  • D. S. Neznakhin,
  • A. V. Arkhipov,
  • S. V. Andreev,
  • A. S. Rusalina,
  • A. V. Tebenkov,
  • A. I. Medvedev,
  • I. V. Beketov,
  • G. V. Kurlyandskaya

摘要

Melt-spun ribbons of GdTbDyHoEr high-entropy alloy have a single-phase hexagonal-close-packed structure. The maximum value of the magnetic entropy change ΔSM for this alloy after rapid quenching increases up to 8.6 J kg− 1 K− 1 in the external magnetic field of 5 T at T = 180 K, and the refrigerant capacity RC reaches 340 J kg− 1 in the external magnetic field of 2 T. The present analysis indicates that the higher values of the magnetic entropy change and the refrigerant capacity for the GdTbDyHoEr melt-spun ribbons are apparently due to their lower effective magnetic anisotropy in comparison with the bulk alloy and more intense response to an external magnetic field. The presented results indicate a way to obtain highly efficient materials for magnetic refrigeration applications.