Novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy for both high magnetization and Curie temperature

Hui Xu; Xiaopeng Wang; Junqi Liu; Fantao Kong

doi:10.1016/j.scriptamat.2024.115989

Novel Co₇₅Al_8.4Si_8.3Ti_8.3 medium entropy alloy for both high magnetization and Curie temperature

Hui Xu
, Xiaopeng Wang
, Junqi Liu
, Fantao Kong^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Harbin Institute of Technology

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

3 Scopus citations

Abstract

A novel Co₇₅Al_8.4Si_8.3Ti_8.3 medium entropy alloy (MEA) with excellent magnetic properties was fabricated by vacuum induction melting (VIM). Micro-analysis confirms that the Co₇₅Al_8.4Si_8.3Ti_8.3 MEA is composed of FCC, BCC, and B2 phases, and atomic force microscope (AFM) reveals that the FCC and B2 phases have a distinct magnetic domain structure. The Co₇₅Al_8.4Si_8.3Ti_8.3 MEA exhibits a high saturation magnetization (M_s) of up to 132.13 emu/g at 10 K and maintains a high M_s of 105.4 emu/g at room temperature (298 K). This MEA remains ferromagnetic at 900 K indicating a Curie point (T_c) above this temperature. Compared to most existing high-entropy alloys, this alloy shows relatively high M_s as well as a high T_c.

Original language	English
Article number	115989
Journal	Scripta Materialia
Volume	243
DOIs	https://doi.org/10.1016/j.scriptamat.2024.115989
State	Published - 1 Apr 2024

Keywords

Curie temperature
Magnetic domain structure
Medium entropy alloys
Saturation magnetization

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10.1016/j.scriptamat.2024.115989

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@article{65d2c258089748088f43944954f7dbee,

title = "Novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy for both high magnetization and Curie temperature",

abstract = "A novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy (MEA) with excellent magnetic properties was fabricated by vacuum induction melting (VIM). Micro-analysis confirms that the Co75Al8.4Si8.3Ti8.3 MEA is composed of FCC, BCC, and B2 phases, and atomic force microscope (AFM) reveals that the FCC and B2 phases have a distinct magnetic domain structure. The Co75Al8.4Si8.3Ti8.3 MEA exhibits a high saturation magnetization (Ms) of up to 132.13 emu/g at 10 K and maintains a high Ms of 105.4 emu/g at room temperature (298 K). This MEA remains ferromagnetic at 900 K indicating a Curie point (Tc) above this temperature. Compared to most existing high-entropy alloys, this alloy shows relatively high Ms as well as a high Tc.",

keywords = "Curie temperature, Magnetic domain structure, Medium entropy alloys, Saturation magnetization",

author = "Hui Xu and Xiaopeng Wang and Junqi Liu and Fantao Kong",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = apr,

day = "1",

doi = "10.1016/j.scriptamat.2024.115989",

language = "英语",

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journal = "Scripta Materialia",

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TY - JOUR

T1 - Novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy for both high magnetization and Curie temperature

AU - Xu, Hui

AU - Wang, Xiaopeng

AU - Liu, Junqi

AU - Kong, Fantao

PY - 2024/4/1

Y1 - 2024/4/1

N2 - A novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy (MEA) with excellent magnetic properties was fabricated by vacuum induction melting (VIM). Micro-analysis confirms that the Co75Al8.4Si8.3Ti8.3 MEA is composed of FCC, BCC, and B2 phases, and atomic force microscope (AFM) reveals that the FCC and B2 phases have a distinct magnetic domain structure. The Co75Al8.4Si8.3Ti8.3 MEA exhibits a high saturation magnetization (Ms) of up to 132.13 emu/g at 10 K and maintains a high Ms of 105.4 emu/g at room temperature (298 K). This MEA remains ferromagnetic at 900 K indicating a Curie point (Tc) above this temperature. Compared to most existing high-entropy alloys, this alloy shows relatively high Ms as well as a high Tc.

AB - A novel Co75Al8.4Si8.3Ti8.3 medium entropy alloy (MEA) with excellent magnetic properties was fabricated by vacuum induction melting (VIM). Micro-analysis confirms that the Co75Al8.4Si8.3Ti8.3 MEA is composed of FCC, BCC, and B2 phases, and atomic force microscope (AFM) reveals that the FCC and B2 phases have a distinct magnetic domain structure. The Co75Al8.4Si8.3Ti8.3 MEA exhibits a high saturation magnetization (Ms) of up to 132.13 emu/g at 10 K and maintains a high Ms of 105.4 emu/g at room temperature (298 K). This MEA remains ferromagnetic at 900 K indicating a Curie point (Tc) above this temperature. Compared to most existing high-entropy alloys, this alloy shows relatively high Ms as well as a high Tc.

KW - Curie temperature

KW - Magnetic domain structure

KW - Medium entropy alloys

KW - Saturation magnetization

UR - https://www.scopus.com/pages/publications/85183470295

U2 - 10.1016/j.scriptamat.2024.115989

DO - 10.1016/j.scriptamat.2024.115989

M3 - 文章

AN - SCOPUS:85183470295

SN - 1359-6462

VL - 243

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 115989

ER -

Novel Co₇₅Al_8.4Si_8.3Ti_8.3 medium entropy alloy for both high magnetization and Curie temperature

Abstract

Keywords

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