Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications

X. Huang; X. T. Dong; X. C. Zhong; S. Y. Yao; J. H. Huang; C. L. Liu; J. Liu; Z. W. Liu; R. V. Ramanujan

doi:10.1016/j.intermet.2023.107870

Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications

X. Huang, X. T. Dong, X. C. Zhong^*, S. Y. Yao, J. H. Huang, C. L. Liu, J. Liu, Z. W. Liu, R. V. Ramanujan

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The effect of La content on the phase formation, microstructural evolution and magnetocaloric properties of off-stoichiometric La_xFe₁₁Co_0.8Si_1.2 (x = 1.0, 1.2, 1.4, 1.6) alloys has been investigated. The time for forming a high content of the desired 1:13 phase decreased with an increase in La content, due to the presence of the 5:3 phase and fine α-Fe dendrites. However, excessive La content results in an undesirable La-rich phase. After annealing at 1323 K for 7 days, a high content of the 1:13 phase (>90 wt%), and large maximum magnetic entropy change (‒ΔS_M)^max of 6.81–7.59 J/kg·K (ΔH = 2 T) in the temperature range 270–278 K was obtained in all samples. Large values of (‒ΔS_M)^max and tunable Curie temperature (T_C) along with short annealing time make these alloys promising magnetic refrigeration materials for near room temperature applications.

Original language	English
Article number	107870
Journal	Intermetallics
Volume	157
DOIs	https://doi.org/10.1016/j.intermet.2023.107870
Publication status	Published - Jun 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

ASJC Scopus Subject Areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Keywords

La-Fe-Co-Si alloy
Magnetic refrigeration
Magnetocaloric effect
Phase evolution

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10.1016/j.intermet.2023.107870

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@article{2a1e424615a84b0ea42b370400cbe02b,

title = "Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications",

abstract = "The effect of La content on the phase formation, microstructural evolution and magnetocaloric properties of off-stoichiometric LaxFe11Co0.8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) alloys has been investigated. The time for forming a high content of the desired 1:13 phase decreased with an increase in La content, due to the presence of the 5:3 phase and fine α-Fe dendrites. However, excessive La content results in an undesirable La-rich phase. After annealing at 1323 K for 7 days, a high content of the 1:13 phase (>90 wt%), and large maximum magnetic entropy change (‒ΔSM)max of 6.81–7.59 J/kg·K (ΔH = 2 T) in the temperature range 270–278 K was obtained in all samples. Large values of (‒ΔSM)max and tunable Curie temperature (TC) along with short annealing time make these alloys promising magnetic refrigeration materials for near room temperature applications.",

keywords = "La-Fe-Co-Si alloy, Magnetic refrigeration, Magnetocaloric effect, Phase evolution",

author = "X. Huang and Dong, {X. T.} and Zhong, {X. C.} and Yao, {S. Y.} and Huang, {J. H.} and Liu, {C. L.} and J. Liu and Liu, {Z. W.} and Ramanujan, {R. V.}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = jun,

doi = "10.1016/j.intermet.2023.107870",

language = "English",

volume = "157",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications

AU - Huang, X.

AU - Dong, X. T.

AU - Zhong, X. C.

AU - Yao, S. Y.

AU - Huang, J. H.

AU - Liu, C. L.

AU - Liu, J.

AU - Liu, Z. W.

AU - Ramanujan, R. V.

PY - 2023/6

Y1 - 2023/6

N2 - The effect of La content on the phase formation, microstructural evolution and magnetocaloric properties of off-stoichiometric LaxFe11Co0.8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) alloys has been investigated. The time for forming a high content of the desired 1:13 phase decreased with an increase in La content, due to the presence of the 5:3 phase and fine α-Fe dendrites. However, excessive La content results in an undesirable La-rich phase. After annealing at 1323 K for 7 days, a high content of the 1:13 phase (>90 wt%), and large maximum magnetic entropy change (‒ΔSM)max of 6.81–7.59 J/kg·K (ΔH = 2 T) in the temperature range 270–278 K was obtained in all samples. Large values of (‒ΔSM)max and tunable Curie temperature (TC) along with short annealing time make these alloys promising magnetic refrigeration materials for near room temperature applications.

AB - The effect of La content on the phase formation, microstructural evolution and magnetocaloric properties of off-stoichiometric LaxFe11Co0.8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) alloys has been investigated. The time for forming a high content of the desired 1:13 phase decreased with an increase in La content, due to the presence of the 5:3 phase and fine α-Fe dendrites. However, excessive La content results in an undesirable La-rich phase. After annealing at 1323 K for 7 days, a high content of the 1:13 phase (>90 wt%), and large maximum magnetic entropy change (‒ΔSM)max of 6.81–7.59 J/kg·K (ΔH = 2 T) in the temperature range 270–278 K was obtained in all samples. Large values of (‒ΔSM)max and tunable Curie temperature (TC) along with short annealing time make these alloys promising magnetic refrigeration materials for near room temperature applications.

KW - La-Fe-Co-Si alloy

KW - Magnetic refrigeration

KW - Magnetocaloric effect

KW - Phase evolution

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DO - 10.1016/j.intermet.2023.107870

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ER -

Rapid formation of the magnetocaloric phase in La-Fe-Co-Si magnetocaloric alloys for near room temperature applications

Abstract

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Keywords

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