Manufacture and characterization of HoErCo medium-entropy alloy microwires with excellent magnetic entropy change

Ying Bao; Hongxian Shen; Jierong Liang; Hangboce Yin; Ze Li; Yongjiang Huang; Jianfei Sun

doi:10.1016/j.jnoncrysol.2020.120570

Manufacture and characterization of HoErCo medium-entropy alloy microwires with excellent magnetic entropy change

Ying Bao, Hongxian Shen^*, Jierong Liang, Hangboce Yin, Ze Li, Yongjiang Huang, Jianfei Sun

^*Corresponding author for this work

Department of Energy Conversion and Storage

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A melt-extracted HoErCo medium-entropy alloy (MEA) with large magnetic entropy change and excellent magnetic refrigerant capacity is successfully designed in this study. The microstructure evolution of these microwires near room temperature is studied by an in-situ high energy synchrotron X-ray diffraction (HEXRD). The wires show typical amorphous characteristics during room temperature to 250 K. For a field change of 5 T, the maximum magnetic entropy change (-ΔS_M^max) of the microwires reaches a maximum value of 15.0 J•kg⁻¹ K⁻¹. Magnetization measurements revealed a paramagnetic to ferromagnetic phase transition at T_C~16 K. The refrigerant capacity (RC) and relative cooling power (RCP) are 527 J•kg⁻¹ and 600 J•kg⁻¹, respectively. This investigation highlights the potential of HoErCo MEA microwires as promising magnetocaloric effect materials for cryogenic applications of magnetic cooling.

Original language	English
Article number	120570
Journal	Journal of Non-Crystalline Solids
Volume	556
ISSN	0022-3093
DOIs	https://doi.org/10.1016/j.jnoncrysol.2020.120570
Publication status	Published - 2021

Keywords

Amorphous
High energy X-ray diffraction
Magnetocaloric effect
Medium-entropy alloy
Melt-extracted
Microwires

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title = "Manufacture and characterization of HoErCo medium-entropy alloy microwires with excellent magnetic entropy change",

abstract = "A melt-extracted HoErCo medium-entropy alloy (MEA) with large magnetic entropy change and excellent magnetic refrigerant capacity is successfully designed in this study. The microstructure evolution of these microwires near room temperature is studied by an in-situ high energy synchrotron X-ray diffraction (HEXRD). The wires show typical amorphous characteristics during room temperature to 250 K. For a field change of 5 T, the maximum magnetic entropy change (-ΔSMmax) of the microwires reaches a maximum value of 15.0 J•kg−1 K−1. Magnetization measurements revealed a paramagnetic to ferromagnetic phase transition at TC~16 K. The refrigerant capacity (RC) and relative cooling power (RCP) are 527 J•kg−1 and 600 J•kg−1, respectively. This investigation highlights the potential of HoErCo MEA microwires as promising magnetocaloric effect materials for cryogenic applications of magnetic cooling.",

keywords = "Amorphous, High energy X-ray diffraction, Magnetocaloric effect, Medium-entropy alloy, Melt-extracted, Microwires",

author = "Ying Bao and Hongxian Shen and Jierong Liang and Hangboce Yin and Ze Li and Yongjiang Huang and Jianfei Sun",

year = "2021",

doi = "10.1016/j.jnoncrysol.2020.120570",

language = "English",

volume = "556",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier",

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TY - JOUR

T1 - Manufacture and characterization of HoErCo medium-entropy alloy microwires with excellent magnetic entropy change

AU - Bao, Ying

AU - Shen, Hongxian

AU - Liang, Jierong

AU - Yin, Hangboce

AU - Li, Ze

AU - Huang, Yongjiang

AU - Sun, Jianfei

PY - 2021

Y1 - 2021

N2 - A melt-extracted HoErCo medium-entropy alloy (MEA) with large magnetic entropy change and excellent magnetic refrigerant capacity is successfully designed in this study. The microstructure evolution of these microwires near room temperature is studied by an in-situ high energy synchrotron X-ray diffraction (HEXRD). The wires show typical amorphous characteristics during room temperature to 250 K. For a field change of 5 T, the maximum magnetic entropy change (-ΔSMmax) of the microwires reaches a maximum value of 15.0 J•kg−1 K−1. Magnetization measurements revealed a paramagnetic to ferromagnetic phase transition at TC~16 K. The refrigerant capacity (RC) and relative cooling power (RCP) are 527 J•kg−1 and 600 J•kg−1, respectively. This investigation highlights the potential of HoErCo MEA microwires as promising magnetocaloric effect materials for cryogenic applications of magnetic cooling.

AB - A melt-extracted HoErCo medium-entropy alloy (MEA) with large magnetic entropy change and excellent magnetic refrigerant capacity is successfully designed in this study. The microstructure evolution of these microwires near room temperature is studied by an in-situ high energy synchrotron X-ray diffraction (HEXRD). The wires show typical amorphous characteristics during room temperature to 250 K. For a field change of 5 T, the maximum magnetic entropy change (-ΔSMmax) of the microwires reaches a maximum value of 15.0 J•kg−1 K−1. Magnetization measurements revealed a paramagnetic to ferromagnetic phase transition at TC~16 K. The refrigerant capacity (RC) and relative cooling power (RCP) are 527 J•kg−1 and 600 J•kg−1, respectively. This investigation highlights the potential of HoErCo MEA microwires as promising magnetocaloric effect materials for cryogenic applications of magnetic cooling.

KW - Amorphous

KW - High energy X-ray diffraction

KW - Magnetocaloric effect

KW - Medium-entropy alloy

KW - Melt-extracted

KW - Microwires

U2 - 10.1016/j.jnoncrysol.2020.120570

DO - 10.1016/j.jnoncrysol.2020.120570

M3 - Journal article

AN - SCOPUS:85097480420

SN - 0022-3093

VL - 556

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

M1 - 120570

ER -

Manufacture and characterization of HoErCo medium-entropy alloy microwires with excellent magnetic entropy change

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Keywords

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