Magnetic Transition and Magnetocaloric Effect of Gd(Ga, X) (X = Al, Si) Alloys

Guiquan Yao; Botao Liu; Qiang Wang; Weibin Cui; Sen Yang

doi:10.1007/s11664-023-10277-1

Magnetic Transition and Magnetocaloric Effect of Gd(Ga, X) (X = Al, Si) Alloys

Guiquan Yao
, Botao Liu
, Qiang Wang
, Weibin Cui
, Sen Yang

School of Physics

Northeastern University China

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

4 Scopus citations

Abstract

The crystal structure, magnetic properties, and magnetocaloric performances of Gd(Ga, x) (x = Al, Si) alloys have been systematically investigated. The single phase with a CrB-type orthorhombic structure (space group Cmcm) was observed for x ≤ 0.5 in GdGa_1−xAl_x and y ≤ 0.2 in GdGa_1−ySi_y alloys. All phase transitions of GdGa_1−xAl_x (0 ≤ x ≤ 0.5) alloys are of second-order and their Curie temperatures (T_C) increase with the enhancement of the Al substitution amount. GdGa_0.8Si_0.2 alloy undergoes a first-order magnetic transition from antiferromagnetic (AFM) state to paramagnetic (PM) state. For Δμ₀H of 0–7 T, the values of the maximum magnetic entropy change are 6.6 J/kg K, 7.7 J/kg K, 8.4 J/kg K, and 6.8 J/kg K in GdGa, GdGa_0.7Al_0.3, GdGa_0.5Al_0.5 , and GdGa_0.8Si_0.2 alloys, respectively. The magnetic entropy change is enhanced at the critical composition, which is ascribed to the lattice distortion.

Original language	English
Pages (from-to)	3742-3748
Number of pages	7
Journal	Journal of Electronic Materials
Volume	52
Issue number	6
DOIs	https://doi.org/10.1007/s11664-023-10277-1
State	Published - Jun 2023

Keywords

Magnetocaloric effect
magnetic phase transition
magnetic refrigeration

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10.1007/s11664-023-10277-1

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title = "Magnetic Transition and Magnetocaloric Effect of Gd(Ga, X) (X = Al, Si) Alloys",

abstract = "The crystal structure, magnetic properties, and magnetocaloric performances of Gd(Ga, x) (x = Al, Si) alloys have been systematically investigated. The single phase with a CrB-type orthorhombic structure (space group Cmcm) was observed for x ≤ 0.5 in GdGa1−xAlx and y ≤ 0.2 in GdGa1−ySiy alloys. All phase transitions of GdGa1−xAlx (0 ≤ x ≤ 0.5) alloys are of second-order and their Curie temperatures (TC) increase with the enhancement of the Al substitution amount. GdGa0.8Si0.2 alloy undergoes a first-order magnetic transition from antiferromagnetic (AFM) state to paramagnetic (PM) state. For Δμ0H of 0–7 T, the values of the maximum magnetic entropy change are 6.6 J/kg K, 7.7 J/kg K, 8.4 J/kg K, and 6.8 J/kg K in GdGa, GdGa0.7Al0.3, GdGa0.5Al0.5 , and GdGa0.8Si0.2 alloys, respectively. The magnetic entropy change is enhanced at the critical composition, which is ascribed to the lattice distortion.",

keywords = "Magnetocaloric effect, magnetic phase transition, magnetic refrigeration",

author = "Guiquan Yao and Botao Liu and Qiang Wang and Weibin Cui and Sen Yang",

note = "Publisher Copyright: {\textcopyright} 2023, The Minerals, Metals \& Materials Society.",

year = "2023",

month = jun,

doi = "10.1007/s11664-023-10277-1",

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TY - JOUR

T1 - Magnetic Transition and Magnetocaloric Effect of Gd(Ga, X) (X = Al, Si) Alloys

AU - Yao, Guiquan

AU - Liu, Botao

AU - Wang, Qiang

AU - Cui, Weibin

AU - Yang, Sen

PY - 2023/6

Y1 - 2023/6

N2 - The crystal structure, magnetic properties, and magnetocaloric performances of Gd(Ga, x) (x = Al, Si) alloys have been systematically investigated. The single phase with a CrB-type orthorhombic structure (space group Cmcm) was observed for x ≤ 0.5 in GdGa1−xAlx and y ≤ 0.2 in GdGa1−ySiy alloys. All phase transitions of GdGa1−xAlx (0 ≤ x ≤ 0.5) alloys are of second-order and their Curie temperatures (TC) increase with the enhancement of the Al substitution amount. GdGa0.8Si0.2 alloy undergoes a first-order magnetic transition from antiferromagnetic (AFM) state to paramagnetic (PM) state. For Δμ0H of 0–7 T, the values of the maximum magnetic entropy change are 6.6 J/kg K, 7.7 J/kg K, 8.4 J/kg K, and 6.8 J/kg K in GdGa, GdGa0.7Al0.3, GdGa0.5Al0.5 , and GdGa0.8Si0.2 alloys, respectively. The magnetic entropy change is enhanced at the critical composition, which is ascribed to the lattice distortion.

AB - The crystal structure, magnetic properties, and magnetocaloric performances of Gd(Ga, x) (x = Al, Si) alloys have been systematically investigated. The single phase with a CrB-type orthorhombic structure (space group Cmcm) was observed for x ≤ 0.5 in GdGa1−xAlx and y ≤ 0.2 in GdGa1−ySiy alloys. All phase transitions of GdGa1−xAlx (0 ≤ x ≤ 0.5) alloys are of second-order and their Curie temperatures (TC) increase with the enhancement of the Al substitution amount. GdGa0.8Si0.2 alloy undergoes a first-order magnetic transition from antiferromagnetic (AFM) state to paramagnetic (PM) state. For Δμ0H of 0–7 T, the values of the maximum magnetic entropy change are 6.6 J/kg K, 7.7 J/kg K, 8.4 J/kg K, and 6.8 J/kg K in GdGa, GdGa0.7Al0.3, GdGa0.5Al0.5 , and GdGa0.8Si0.2 alloys, respectively. The magnetic entropy change is enhanced at the critical composition, which is ascribed to the lattice distortion.

KW - Magnetocaloric effect

KW - magnetic phase transition

KW - magnetic refrigeration

UR - https://www.scopus.com/pages/publications/85150169104

U2 - 10.1007/s11664-023-10277-1

DO - 10.1007/s11664-023-10277-1

M3 - 文章

AN - SCOPUS:85150169104

SN - 0361-5235

VL - 52

SP - 3742

EP - 3748

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

IS - 6

ER -

Magnetic Transition and Magnetocaloric Effect of Gd(Ga, X) (X = Al, Si) Alloys

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