Low hysteresis and large room temperature magnetocaloric effect of Gd 5Si2.05-xGe1.95-xNi2x (2x 0.08, 0.1) alloys

X. C. Zhong; J. X. Min; Z. W. Liu; Z. G. Zheng; D. C. Zeng; V. Franco; R. V. Ramanujan

doi:10.1063/1.4795434

Low hysteresis and large room temperature magnetocaloric effect of Gd ₅Si_2.05-xGe_1.95-xNi_2x (2x 0.08, 0.1) alloys

X. C. Zhong^*, J. X. Min, Z. W. Liu, Z. G. Zheng, D. C. Zeng, V. Franco, R. V. Ramanujan

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

Gd₅Si_2.05-xGe_1.95-xNi₂ _x (2x 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd₅Si ₂Ge₂-type phase, orthorhombic Gd₅Si ₄-type phase, and a small amount of Gd₅Si₃-type phase were obtained in these alloys. Gd₅Si_2.01Ge _1.91Ni_0.08 alloy undergoes a second-order transition (T_C) around 300 K, whereas Gd₅Si₂Ge _1.9Ni_0.1 alloy exhibits two transitions including a first-order transition (T_C) at ∼295 K and second-order transition (T_C) at ∼301 K. Ni substitution can effectively reduce the thermal hysteresis and magnetic hysteresis while maintaining large magnetic entropy change. The maximum magnetic entropy changes (|ΔS_M ^max|) of Gd₅Si_2.05-xGe_1.95-xNi _2x alloys with 2x 0.08 and 0.1 are 4.4 and 5.0 J kg ^-1 K^-1, respectively, for 0-2 T, and are 8.0 and 9.1 J kg^-1 K^-1, respectively, for 0-5 T. Low hysteresis performance and relatively large magnetic entropy change make these alloys favorable for magnetic refrigeration applications.

Original language	English
Article number	17A916
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4795434
Publication status	Published - May 7 2013
Externally published	Yes

ASJC Scopus Subject Areas

General Physics and Astronomy

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@article{019dd54e3b23430ebf8f3acc3c62be77,

title = "Low hysteresis and large room temperature magnetocaloric effect of Gd 5Si2.05-xGe1.95-xNi2x (2x 0.08, 0.1) alloys",

abstract = "Gd5Si2.05-xGe1.95-xNi2 x (2x 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si 2Ge2-type phase, orthorhombic Gd5Si 4-type phase, and a small amount of Gd5Si3-type phase were obtained in these alloys. Gd5Si2.01Ge 1.91Ni0.08 alloy undergoes a second-order transition (TC) around 300 K, whereas Gd5Si2Ge 1.9Ni0.1 alloy exhibits two transitions including a first-order transition (TC) at ∼295 K and second-order transition (TC) at ∼301 K. Ni substitution can effectively reduce the thermal hysteresis and magnetic hysteresis while maintaining large magnetic entropy change. The maximum magnetic entropy changes (|ΔSM max|) of Gd5Si2.05-xGe1.95-xNi 2x alloys with 2x 0.08 and 0.1 are 4.4 and 5.0 J kg -1 K-1, respectively, for 0-2 T, and are 8.0 and 9.1 J kg-1 K-1, respectively, for 0-5 T. Low hysteresis performance and relatively large magnetic entropy change make these alloys favorable for magnetic refrigeration applications.",

author = "Zhong, {X. C.} and Min, {J. X.} and Liu, {Z. W.} and Zheng, {Z. G.} and Zeng, {D. C.} and V. Franco and Ramanujan, {R. V.}",

year = "2013",

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doi = "10.1063/1.4795434",

language = "English",

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T1 - Low hysteresis and large room temperature magnetocaloric effect of Gd 5Si2.05-xGe1.95-xNi2x (2x 0.08, 0.1) alloys

AU - Zhong, X. C.

AU - Min, J. X.

AU - Liu, Z. W.

AU - Zheng, Z. G.

AU - Zeng, D. C.

AU - Franco, V.

AU - Ramanujan, R. V.

PY - 2013/5/7

Y1 - 2013/5/7

N2 - Gd5Si2.05-xGe1.95-xNi2 x (2x 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si 2Ge2-type phase, orthorhombic Gd5Si 4-type phase, and a small amount of Gd5Si3-type phase were obtained in these alloys. Gd5Si2.01Ge 1.91Ni0.08 alloy undergoes a second-order transition (TC) around 300 K, whereas Gd5Si2Ge 1.9Ni0.1 alloy exhibits two transitions including a first-order transition (TC) at ∼295 K and second-order transition (TC) at ∼301 K. Ni substitution can effectively reduce the thermal hysteresis and magnetic hysteresis while maintaining large magnetic entropy change. The maximum magnetic entropy changes (|ΔSM max|) of Gd5Si2.05-xGe1.95-xNi 2x alloys with 2x 0.08 and 0.1 are 4.4 and 5.0 J kg -1 K-1, respectively, for 0-2 T, and are 8.0 and 9.1 J kg-1 K-1, respectively, for 0-5 T. Low hysteresis performance and relatively large magnetic entropy change make these alloys favorable for magnetic refrigeration applications.

AB - Gd5Si2.05-xGe1.95-xNi2 x (2x 0.08, 0.1) alloys were prepared by arc melting followed by annealing at 1273 K for 96 h. Mixed monoclinic Gd5Si 2Ge2-type phase, orthorhombic Gd5Si 4-type phase, and a small amount of Gd5Si3-type phase were obtained in these alloys. Gd5Si2.01Ge 1.91Ni0.08 alloy undergoes a second-order transition (TC) around 300 K, whereas Gd5Si2Ge 1.9Ni0.1 alloy exhibits two transitions including a first-order transition (TC) at ∼295 K and second-order transition (TC) at ∼301 K. Ni substitution can effectively reduce the thermal hysteresis and magnetic hysteresis while maintaining large magnetic entropy change. The maximum magnetic entropy changes (|ΔSM max|) of Gd5Si2.05-xGe1.95-xNi 2x alloys with 2x 0.08 and 0.1 are 4.4 and 5.0 J kg -1 K-1, respectively, for 0-2 T, and are 8.0 and 9.1 J kg-1 K-1, respectively, for 0-5 T. Low hysteresis performance and relatively large magnetic entropy change make these alloys favorable for magnetic refrigeration applications.

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Low hysteresis and large room temperature magnetocaloric effect of Gd ₅Si_2.05-xGe_1.95-xNi_2x (2x 0.08, 0.1) alloys

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