Large low-field reversible magnetocaloric effect in K3Gd(PO4)2 at sub-Kelvin temperature

Haojie Wang; Zhaojun Mo; Jianjian Gong; Heng Tu; Guochun Zhang; Jun Shen

doi:10.1016/j.jre.2023.04.013

Large low-field reversible magnetocaloric effect in K₃Gd(PO₄)₂ at sub-Kelvin temperature

Haojie Wang
, Zhaojun Mo
, Jianjian Gong
, Heng Tu^*
, Guochun Zhang
, Jun Shen^*

^*Corresponding author for this work

School of Mechanical Engineering

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

9 Citations (Scopus)

Abstract

We synthesized a potassium gadolinium phosphate K₃Gd(PO₄)₂ with monoclinic structure (P2₁/m) by the high-temperature solid–state reaction method. Its lattice constants obtained by Rietveld refinements of XRD curve are a = 0.7411 nm, b = 0.5624 nm, and c = 0.9433 nm. Magnetic and magnetocaloric properties of K₃Gd(PO₄)₂ were investigated in detail. The magnetic phase transition temperature of K₃Gd(PO₄)₂ was determined by ultra-low temperature testing to be 0.58 K. K₃Gd(PO₄)₂ exhibits large magnetic entropy changes (–ΔS_M). The maximum –ΔS_M are 20.2 and 29.4 J/(kg·K) in the magnetic field variation (ΔH) of 1 and 2 T, respectively, which are larger than that of the commercial Gd₃Ga₅O₁₂ (GGG). The maximum adiabatic temperature change (ΔT_ad) reaches 5.91 K under a magnetic field change (ΔH) of 1 T. K₃Gd(PO₄)₂ is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

Original language	English
Pages (from-to)	1087-1092
Number of pages	6
Journal	Journal of Rare Earths
Volume	42
Issue number	6
DOIs	https://doi.org/10.1016/j.jre.2023.04.013
Publication status	Published - Jun 2024

Keywords

Magnetic entropy change
Magnetic refrigeration
Magnetocaloric effect
Rare earths
Ultra-low temperature

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10.1016/j.jre.2023.04.013

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@article{69dabc4a900e452c9a551632d529873c,

title = "Large low-field reversible magnetocaloric effect in K3Gd(PO4)2 at sub-Kelvin temperature",

abstract = "We synthesized a potassium gadolinium phosphate K3Gd(PO4)2 with monoclinic structure (P21/m) by the high-temperature solid–state reaction method. Its lattice constants obtained by Rietveld refinements of XRD curve are a = 0.7411 nm, b = 0.5624 nm, and c = 0.9433 nm. Magnetic and magnetocaloric properties of K3Gd(PO4)2 were investigated in detail. The magnetic phase transition temperature of K3Gd(PO4)2 was determined by ultra-low temperature testing to be 0.58 K. K3Gd(PO4)2 exhibits large magnetic entropy changes (–ΔSM). The maximum –ΔSM are 20.2 and 29.4 J/(kg·K) in the magnetic field variation (ΔH) of 1 and 2 T, respectively, which are larger than that of the commercial Gd3Ga5O12 (GGG). The maximum adiabatic temperature change (ΔTad) reaches 5.91 K under a magnetic field change (ΔH) of 1 T. K3Gd(PO4)2 is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.",

keywords = "Magnetic entropy change, Magnetic refrigeration, Magnetocaloric effect, Rare earths, Ultra-low temperature",

author = "Haojie Wang and Zhaojun Mo and Jianjian Gong and Heng Tu and Guochun Zhang and Jun Shen",

note = "Publisher Copyright: {\textcopyright} 2023 Chinese Society of Rare Earths",

year = "2024",

month = jun,

doi = "10.1016/j.jre.2023.04.013",

language = "English",

volume = "42",

pages = "1087--1092",

journal = "Journal of Rare Earths",

issn = "1002-0721",

publisher = "Editorial Office of Chinese Rare Earths",

number = "6",

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TY - JOUR

T1 - Large low-field reversible magnetocaloric effect in K3Gd(PO4)2 at sub-Kelvin temperature

AU - Wang, Haojie

AU - Mo, Zhaojun

AU - Gong, Jianjian

AU - Tu, Heng

AU - Zhang, Guochun

AU - Shen, Jun

PY - 2024/6

Y1 - 2024/6

N2 - We synthesized a potassium gadolinium phosphate K3Gd(PO4)2 with monoclinic structure (P21/m) by the high-temperature solid–state reaction method. Its lattice constants obtained by Rietveld refinements of XRD curve are a = 0.7411 nm, b = 0.5624 nm, and c = 0.9433 nm. Magnetic and magnetocaloric properties of K3Gd(PO4)2 were investigated in detail. The magnetic phase transition temperature of K3Gd(PO4)2 was determined by ultra-low temperature testing to be 0.58 K. K3Gd(PO4)2 exhibits large magnetic entropy changes (–ΔSM). The maximum –ΔSM are 20.2 and 29.4 J/(kg·K) in the magnetic field variation (ΔH) of 1 and 2 T, respectively, which are larger than that of the commercial Gd3Ga5O12 (GGG). The maximum adiabatic temperature change (ΔTad) reaches 5.91 K under a magnetic field change (ΔH) of 1 T. K3Gd(PO4)2 is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

AB - We synthesized a potassium gadolinium phosphate K3Gd(PO4)2 with monoclinic structure (P21/m) by the high-temperature solid–state reaction method. Its lattice constants obtained by Rietveld refinements of XRD curve are a = 0.7411 nm, b = 0.5624 nm, and c = 0.9433 nm. Magnetic and magnetocaloric properties of K3Gd(PO4)2 were investigated in detail. The magnetic phase transition temperature of K3Gd(PO4)2 was determined by ultra-low temperature testing to be 0.58 K. K3Gd(PO4)2 exhibits large magnetic entropy changes (–ΔSM). The maximum –ΔSM are 20.2 and 29.4 J/(kg·K) in the magnetic field variation (ΔH) of 1 and 2 T, respectively, which are larger than that of the commercial Gd3Ga5O12 (GGG). The maximum adiabatic temperature change (ΔTad) reaches 5.91 K under a magnetic field change (ΔH) of 1 T. K3Gd(PO4)2 is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

KW - Magnetic entropy change

KW - Magnetic refrigeration

KW - Magnetocaloric effect

KW - Rare earths

KW - Ultra-low temperature

UR - https://www.scopus.com/pages/publications/85184886033

U2 - 10.1016/j.jre.2023.04.013

DO - 10.1016/j.jre.2023.04.013

M3 - Article

AN - SCOPUS:85184886033

SN - 1002-0721

VL - 42

SP - 1087

EP - 1092

JO - Journal of Rare Earths

JF - Journal of Rare Earths

IS - 6

ER -

Large low-field reversible magnetocaloric effect in K₃Gd(PO₄)₂ at sub-Kelvin temperature

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