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

Kei Soejima; Kensuke Otsubo; Takayuki Ohnishi; Hirofumi Wada

doi:10.1007/s10948-021-05995-8

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

Kei Soejima
, Kensuke Otsubo
, Takayuki Ohnishi
, Hirofumi Wada

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-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 ΔS_M. A strong positive correlation between these two quantities is observed. The analyses also suggest that ΔS_M 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 ΔT_ad have revealed ΔT_ad 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 language	English
Pages (from-to)	2879-2884
Number of pages	6
Journal	Journal of Superconductivity and Novel Magnetism
Volume	34
Issue number	11
DOIs	https://doi.org/10.1007/s10948-021-05995-8
Publication status	Published - Nov 2021

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Large Magnetocaloric Effect of Ge-Doped (MnFeRu)2(PSi) Above Room Temperature",

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 (\textasciitilde{} 360 K).",

keywords = "Above room temperature, Adiabatic temperature change, DSC, First-order magnetic transition, Magnetocaloric effect",

author = "Kei Soejima and Kensuke Otsubo and Takayuki Ohnishi and Hirofumi Wada",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2021",

month = nov,

doi = "10.1007/s10948-021-05995-8",

language = "English",

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T1 - Large Magnetocaloric Effect of Ge-Doped (MnFeRu)2(PSi) Above Room Temperature

AU - Soejima, Kei

AU - Otsubo, Kensuke

AU - Ohnishi, Takayuki

AU - Wada, Hirofumi

PY - 2021/11

Y1 - 2021/11

N2 - 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).

AB - 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).

KW - Above room temperature

KW - Adiabatic temperature change

KW - DSC

KW - First-order magnetic transition

KW - Magnetocaloric effect

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U2 - 10.1007/s10948-021-05995-8

DO - 10.1007/s10948-021-05995-8

M3 - Article

AN - SCOPUS:85112466920

SN - 1557-1939

VL - 34

SP - 2879

EP - 2884

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 11

ER -

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

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