Large magnetocaloric effect and refrigerant capacity in Gd-Co-Ni metallic glasses

X. C. Zhong; P. F. Tang; Z. W. Liu; D. C. Zeng; Z. G. Zheng; H. Y. Yu; W. Q. Qiu; H. Zhang; R. V. Ramanujan

doi:10.1063/1.3673422

Large magnetocaloric effect and refrigerant capacity in Gd-Co-Ni metallic glasses

X. C. Zhong^*, P. F. Tang, Z. W. Liu, D. C. Zeng, Z. G. Zheng, H. Y. Yu, W. Q. Qiu, H. Zhang, R. V. Ramanujan

^*Corresponding author for this work

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

52 Citations (Scopus)

Abstract

The thermal stability, magnetocaloric effect, and refrigerant capacity (RC) of Gd-Co-Ni metallic glasses were investigated. These alloys possess high glass transition temperature and crystallization temperature as well as a relatively wide supercooled liquid region δT _x(T _x T _x - T _g) (40-55 K). With increasing the Co/Ni ratio, the Curie temperature T _C of the amorphous Gd-Co-Ni increases from 140 K to 192 K. For a magnetic field change of ₀-5 T, the maximum magnetic entropy change (-S _M ^max) and RC values are in the range of 6.04-6.47 J kg ^-1 K ^-1 and 450-502 J kg ^-1, respectively. These values are comparable with that of La(Fe _0.88Si _0.12) ₁₃ and higher than those for the well known magnetic refrigerant Gd ₅Si ₂Ge _1.9Fe _0.1 alloy. The large magnetic entropy change and refrigerant capacity as well as high thermal stability make the alloys attractive candidates as magnetic refrigeration materials for service temperatures of 100-230 K.

Original language	English
Article number	07A919
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3673422
Publication status	Published - Apr 1 2012
Externally published	Yes

ASJC Scopus Subject Areas

General Physics and Astronomy

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title = "Large magnetocaloric effect and refrigerant capacity in Gd-Co-Ni metallic glasses",

abstract = "The thermal stability, magnetocaloric effect, and refrigerant capacity (RC) of Gd-Co-Ni metallic glasses were investigated. These alloys possess high glass transition temperature and crystallization temperature as well as a relatively wide supercooled liquid region δT x(T x T x - T g) (40-55 K). With increasing the Co/Ni ratio, the Curie temperature T C of the amorphous Gd-Co-Ni increases from 140 K to 192 K. For a magnetic field change of 0-5 T, the maximum magnetic entropy change (-S M max) and RC values are in the range of 6.04-6.47 J kg -1 K -1 and 450-502 J kg -1, respectively. These values are comparable with that of La(Fe 0.88Si 0.12) 13 and higher than those for the well known magnetic refrigerant Gd 5Si 2Ge 1.9Fe 0.1 alloy. The large magnetic entropy change and refrigerant capacity as well as high thermal stability make the alloys attractive candidates as magnetic refrigeration materials for service temperatures of 100-230 K.",

author = "Zhong, {X. C.} and Tang, {P. F.} and Liu, {Z. W.} and Zeng, {D. C.} and Zheng, {Z. G.} and Yu, {H. Y.} and Qiu, {W. Q.} and H. Zhang and Ramanujan, {R. V.}",

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AU - Zhong, X. C.

AU - Tang, P. F.

AU - Liu, Z. W.

AU - Zeng, D. C.

AU - Zheng, Z. G.

AU - Yu, H. Y.

AU - Qiu, W. Q.

AU - Zhang, H.

AU - Ramanujan, R. V.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - The thermal stability, magnetocaloric effect, and refrigerant capacity (RC) of Gd-Co-Ni metallic glasses were investigated. These alloys possess high glass transition temperature and crystallization temperature as well as a relatively wide supercooled liquid region δT x(T x T x - T g) (40-55 K). With increasing the Co/Ni ratio, the Curie temperature T C of the amorphous Gd-Co-Ni increases from 140 K to 192 K. For a magnetic field change of 0-5 T, the maximum magnetic entropy change (-S M max) and RC values are in the range of 6.04-6.47 J kg -1 K -1 and 450-502 J kg -1, respectively. These values are comparable with that of La(Fe 0.88Si 0.12) 13 and higher than those for the well known magnetic refrigerant Gd 5Si 2Ge 1.9Fe 0.1 alloy. The large magnetic entropy change and refrigerant capacity as well as high thermal stability make the alloys attractive candidates as magnetic refrigeration materials for service temperatures of 100-230 K.

AB - The thermal stability, magnetocaloric effect, and refrigerant capacity (RC) of Gd-Co-Ni metallic glasses were investigated. These alloys possess high glass transition temperature and crystallization temperature as well as a relatively wide supercooled liquid region δT x(T x T x - T g) (40-55 K). With increasing the Co/Ni ratio, the Curie temperature T C of the amorphous Gd-Co-Ni increases from 140 K to 192 K. For a magnetic field change of 0-5 T, the maximum magnetic entropy change (-S M max) and RC values are in the range of 6.04-6.47 J kg -1 K -1 and 450-502 J kg -1, respectively. These values are comparable with that of La(Fe 0.88Si 0.12) 13 and higher than those for the well known magnetic refrigerant Gd 5Si 2Ge 1.9Fe 0.1 alloy. The large magnetic entropy change and refrigerant capacity as well as high thermal stability make the alloys attractive candidates as magnetic refrigeration materials for service temperatures of 100-230 K.

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Large magnetocaloric effect and refrigerant capacity in Gd-Co-Ni metallic glasses

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