What question did this study set out to answer?

This research aims to develop a new Tm-substituted magnet with improved magnetic properties and temperature stability.

April 22, 2026

Tm-Substituted 2:17-type magnets: balancing room-temperature magnetic properties and temperature stability

Key Points

This research aims to develop a new Tm-substituted magnet with improved magnetic properties and temperature stability.
Developed a (Sm,Tm)2Co17-type magnet with specific compositions.
Conducted high-temperature processing to optimize magnetic properties.
Achieved a temperature stability coefficient (α) of -0.008%/°C from 20 to 150 °C.
Measured a residual magnetic induction (Br) of 9.25 kG and a maximum energy product ((BH)max) of 19.26 MGOe.
Improved magnetic coercivity (Hcj) by 152% to 25.03 kOe.

Abstract

A novel (Sm,Tm) 2 Co 17 -type magnet is developed with an α of −0.008%/°C from 20 to 150 °C, while maintaining a B r of 9.25 kG and a ( BH ) max of 19.26 MGOe, and an optimized high-temperature process further improves H cj by 152% to 25.03 kOe.

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