Prospects for the development of SmFe12-based permanent magnets with a ThMn12-type phase

P. Tozman; H. Sepehri-Amin; K. Hono

doi:10.1016/j.scriptamat.2020.113686

Prospects for the development of SmFe₁₂-based permanent magnets with a ThMn₁₂-type phase

P. Tozman, H. Sepehri-Amin, K. Hono

International Center for Synchrotron Radiation Innovation Smart (SRIS)

National Institute for Materials Science Tsukuba

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

27 Citations (Scopus)

Abstract

The research interest in SmFe₁₂-based permanent magnets has recently been revived in search for new permanent magnet materials that are not dependent on critical rare earth elements such as Nd and Dy. Although the superiority of the intrinsic hard magnetic properties of the Sm(Fe_0.8Co_0.2)₁₂ compound as compared to those of Nd₂Fe₁₄B has been experimentally confirmed, its instability as a bulk phase and inability to achieve high coercivity hinder the realization of SmFe₁₂-based high-performance permanent magnets. In this Viewpoint, by critically reviewing recent experimental and theoretical studies on SmFe₁₂-based compounds, we discuss the prospects for the development of SmFe₁₂-based high-performance permanent magnets that can outperform Nd-Fe-B-based magnets.

Original language	English
Article number	113686
Journal	Scripta Materialia
Volume	194
DOIs	https://doi.org/10.1016/j.scriptamat.2020.113686
Publication status	Published - 2021 Mar 15

Keywords

Coercivity
Permanent magnet
ThMn-type structure, SmFe

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10.1016/j.scriptamat.2020.113686

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title = "Prospects for the development of SmFe12-based permanent magnets with a ThMn12-type phase",

abstract = "The research interest in SmFe12-based permanent magnets has recently been revived in search for new permanent magnet materials that are not dependent on critical rare earth elements such as Nd and Dy. Although the superiority of the intrinsic hard magnetic properties of the Sm(Fe0.8Co0.2)12 compound as compared to those of Nd2Fe14B has been experimentally confirmed, its instability as a bulk phase and inability to achieve high coercivity hinder the realization of SmFe12-based high-performance permanent magnets. In this Viewpoint, by critically reviewing recent experimental and theoretical studies on SmFe12-based compounds, we discuss the prospects for the development of SmFe12-based high-performance permanent magnets that can outperform Nd-Fe-B-based magnets.",

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AU - Tozman, P.

AU - Sepehri-Amin, H.

AU - Hono, K.

N1 - Funding Information: This work was supported by Elements Strategy Initiative Center for Magnetic Materials (ESICMM), grant number JPMXP0112101004 , through the Ministry of Education, Culture, Sports, Science and Technology (MEXT). Publisher Copyright: © 2020 Acta Materialia Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

PY - 2021/3/15

Y1 - 2021/3/15

N2 - The research interest in SmFe12-based permanent magnets has recently been revived in search for new permanent magnet materials that are not dependent on critical rare earth elements such as Nd and Dy. Although the superiority of the intrinsic hard magnetic properties of the Sm(Fe0.8Co0.2)12 compound as compared to those of Nd2Fe14B has been experimentally confirmed, its instability as a bulk phase and inability to achieve high coercivity hinder the realization of SmFe12-based high-performance permanent magnets. In this Viewpoint, by critically reviewing recent experimental and theoretical studies on SmFe12-based compounds, we discuss the prospects for the development of SmFe12-based high-performance permanent magnets that can outperform Nd-Fe-B-based magnets.

AB - The research interest in SmFe12-based permanent magnets has recently been revived in search for new permanent magnet materials that are not dependent on critical rare earth elements such as Nd and Dy. Although the superiority of the intrinsic hard magnetic properties of the Sm(Fe0.8Co0.2)12 compound as compared to those of Nd2Fe14B has been experimentally confirmed, its instability as a bulk phase and inability to achieve high coercivity hinder the realization of SmFe12-based high-performance permanent magnets. In this Viewpoint, by critically reviewing recent experimental and theoretical studies on SmFe12-based compounds, we discuss the prospects for the development of SmFe12-based high-performance permanent magnets that can outperform Nd-Fe-B-based magnets.

KW - Coercivity

KW - Permanent magnet

KW - ThMn-type structure, SmFe

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Prospects for the development of SmFe₁₂-based permanent magnets with a ThMn₁₂-type phase

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Keywords

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