Large Magnetocaloric Effect of Ge-Doped (MnFeRu)2(PSi) Above Room Temperature

Kei Soejima, Kensuke Otsubo, Takayuki Ohnishi, Hirofumi Wada

Research output: Contribution to journalArticlepeer-review

Abstract

The magnetocaloric properties of (MnFeRu)2(PSiGe) have been studied by monitoring the differential scanning calorimetry (DSC) and the adiabatic temperature change. The compounds have the Curie temperature of 340–360 K. The DSC curves show sharp peaks, indicating a first-order magnetic transition. The thermal hysteresis is less than 2.3 K. Using our previous data, we examined the correlation between the DSC peak and the magnetic entropy change ΔSM. A strong positive correlation between these two quantities is observed. The analyses also suggest that ΔSM of (MnFeRu)2(PSiGe) reaches 11–16 J/ K kg in a field change of 1.5 T. The direct measurements of the adiabatic temperature change ΔTad have revealed ΔTad of 1.7–1.8 K at 1 T for (MnFeRu)2(PSiGe). These results suggest that (MnFeRu)2(PSiGe) compounds are potential candidates for magnetic refrigerant materials above room temperature up to 90 °C (~ 360 K).

Original languageEnglish
Pages (from-to)2879-2884
Number of pages6
JournalJournal of Superconductivity and Novel Magnetism
Volume34
Issue number11
DOIs
Publication statusPublished - Nov 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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