Rare-earth-free magnetically hard ferrous materials

 

Zefan Shao ^a and Shenqiang Ren *^abc

^aDepartment of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
^bDepartment of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
^cResearch and Education in Energy, Environment & Water (RENEW) Institute, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. E-mail: shenren@buffalo.edu

Received 24th June 2020 , Accepted 25th July 2020

First published on 28th July 2020

 

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Abstract

Permanent magnets, especially rare-earth based magnets, are widely used in energy-critical technologies in many modern applications, involving energy conversion and information technologies. However, the environmental impact and strategic supplies of rare-earth elements hamper the long-term development of permanent magnets. Hence, there is a surge of interest to expand the search for rare-earth-free magnets with a large energy product (BH)_max. Among these rare-earth-free magnets, iron-based permanent magnets emerge as some of the most promising candidates due to their abundance and magnetic performance. In this review, we present a summary of iron-based permanent magnets from materials synthesis to their magnetic properties.

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Zefan Shao

Mr. Zefan Shao is a graduate student of Mechanical and Aerospace Engineering at the University at Buffalo, The State University of New York. He joined the laboratory of Prof. Shenqiang Ren, working on solution-based synthesis of colloidal functional nanomaterials. His research interests focus on functional metal and alloy nanoparticles.

Shenqiang Ren