Large magnetocaloric effect in a ternary Laves phase compoundHo2Rh3Ge

Baidyanath Sahu, Sindisiwe P. Xhakaza, Buyisiwe M. Sondezi, André M. Strydom

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Structural and magnetic properties of an intermetallic Ho2Rh3Ge compound have been investigated in this paper. We report the observation of large magnetocaloric effect (MCE) in Ho2Rh3Ge from the characterization of magnetism isotherms. The Rietveld refinement of powder X-ray diffraction revealed that Ho2Rh3Ge crystallizes in a rhombohedral Laves phase structure (space group R3̄m, hR18). It exhibits ferromagnetic order below the Curie temperature TC = 13 K. Around TC, maximum value of entropy change −ΔSm = 25.4 J kg−1 K−1 was observed for a change of magnetic field 0−8 T. The obtained refrigeration capacity (relative cooling power) for a change of magnetic field from 0 8 T is 497(664) J.kg−1. The second–order magnetic phase transition in Ho2Rh3Ge is confirmed from Arrott plots, universal scaling plots of magnetic entropy changes, and also from the field dependence of the magnetic entropy change.

Original languageEnglish
Article number108058
JournalIntermetallics
Volume164
DOIs
Publication statusPublished - Jan 2024

Keywords

  • Entropy
  • Ferromagnet
  • Magnetocaloric effect
  • Rare-earth compounds
  • Universal scaling plot

ASJC Scopus subject areas

  • General Chemistry
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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