Cryogenic magnetocaloric effect in R 2GeMoO8(R = Gd and Dy) compounds

Zuhua Chen; Dunhui Wang; Chengliang Zhang; Zhengming Zhang; Guochun Zhang; Heng Tu; Jun Shen

doi:10.1063/5.0146514

Cryogenic magnetocaloric effect in R ₂GeMoO₈(R = Gd and Dy) compounds

Zuhua Chen, Dunhui Wang, Chengliang Zhang, Zhengming Zhang, Guochun Zhang, Heng Tu^*, Jun Shen^*

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The cryogenic magnetocaloric effect has attracted great attention due to its application in cryogenic refrigeration technology, which is essential for space science and quantum computing. In this study, the magnetocaloric effect of Gd2GeMoO8 (GGMO) and Dy2GeMoO8 (DGMO), which were prepared by simple solid-state reactions, had been investigated. The XRD refinement analysis suggested that GGMO and DGMO crystallize in a tetragonal structure. A large magnetic entropy change (ΔSM) of -41.2 J kg-1 K-1 was observed at 1.8 K for GGMO under a magnetic field (ΔH) of 7 T. A moderate ΔSM of -14.1 J kg-1 K-1 was obtained at 4.5 K under a ΔH of 7 T in DGMO. The refrigeration capacity and relative cooling power reached 257.4 and 337.8 J kg-1 for GGMO and 133.3 and 143.7 J kg-1 for DGMO, respectively, under a ΔH of 0-7 T. Our results suggest that GGMO is a competitive cryogenic magnetic refrigeration material.

Original language	English
Article number	143904
Journal	Journal of Applied Physics
Volume	133
Issue number	14
DOIs	https://doi.org/10.1063/5.0146514
Publication status	Published - 14 Apr 2023

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title = "Cryogenic magnetocaloric effect in R 2GeMoO8(R = Gd and Dy) compounds",

abstract = "The cryogenic magnetocaloric effect has attracted great attention due to its application in cryogenic refrigeration technology, which is essential for space science and quantum computing. In this study, the magnetocaloric effect of Gd2GeMoO8 (GGMO) and Dy2GeMoO8 (DGMO), which were prepared by simple solid-state reactions, had been investigated. The XRD refinement analysis suggested that GGMO and DGMO crystallize in a tetragonal structure. A large magnetic entropy change (ΔSM) of -41.2 J kg-1 K-1 was observed at 1.8 K for GGMO under a magnetic field (ΔH) of 7 T. A moderate ΔSM of -14.1 J kg-1 K-1 was obtained at 4.5 K under a ΔH of 7 T in DGMO. The refrigeration capacity and relative cooling power reached 257.4 and 337.8 J kg-1 for GGMO and 133.3 and 143.7 J kg-1 for DGMO, respectively, under a ΔH of 0-7 T. Our results suggest that GGMO is a competitive cryogenic magnetic refrigeration material.",

author = "Zuhua Chen and Dunhui Wang and Chengliang Zhang and Zhengming Zhang and Guochun Zhang and Heng Tu and Jun Shen",

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T1 - Cryogenic magnetocaloric effect in R 2GeMoO8(R = Gd and Dy) compounds

AU - Chen, Zuhua

AU - Wang, Dunhui

AU - Zhang, Chengliang

AU - Zhang, Zhengming

AU - Zhang, Guochun

AU - Tu, Heng

AU - Shen, Jun

PY - 2023/4/14

Y1 - 2023/4/14

N2 - The cryogenic magnetocaloric effect has attracted great attention due to its application in cryogenic refrigeration technology, which is essential for space science and quantum computing. In this study, the magnetocaloric effect of Gd2GeMoO8 (GGMO) and Dy2GeMoO8 (DGMO), which were prepared by simple solid-state reactions, had been investigated. The XRD refinement analysis suggested that GGMO and DGMO crystallize in a tetragonal structure. A large magnetic entropy change (ΔSM) of -41.2 J kg-1 K-1 was observed at 1.8 K for GGMO under a magnetic field (ΔH) of 7 T. A moderate ΔSM of -14.1 J kg-1 K-1 was obtained at 4.5 K under a ΔH of 7 T in DGMO. The refrigeration capacity and relative cooling power reached 257.4 and 337.8 J kg-1 for GGMO and 133.3 and 143.7 J kg-1 for DGMO, respectively, under a ΔH of 0-7 T. Our results suggest that GGMO is a competitive cryogenic magnetic refrigeration material.

AB - The cryogenic magnetocaloric effect has attracted great attention due to its application in cryogenic refrigeration technology, which is essential for space science and quantum computing. In this study, the magnetocaloric effect of Gd2GeMoO8 (GGMO) and Dy2GeMoO8 (DGMO), which were prepared by simple solid-state reactions, had been investigated. The XRD refinement analysis suggested that GGMO and DGMO crystallize in a tetragonal structure. A large magnetic entropy change (ΔSM) of -41.2 J kg-1 K-1 was observed at 1.8 K for GGMO under a magnetic field (ΔH) of 7 T. A moderate ΔSM of -14.1 J kg-1 K-1 was obtained at 4.5 K under a ΔH of 7 T in DGMO. The refrigeration capacity and relative cooling power reached 257.4 and 337.8 J kg-1 for GGMO and 133.3 and 143.7 J kg-1 for DGMO, respectively, under a ΔH of 0-7 T. Our results suggest that GGMO is a competitive cryogenic magnetic refrigeration material.

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Cryogenic magnetocaloric effect in R ₂GeMoO₈(R = Gd and Dy) compounds

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