Sm2Co17-based magnets are still playing an irreplaceable role in the permanent magnet industry due to its unique high temperature magnetic properties and superior magnetic stability, then it always serving to the high-speed motors, electronic communication, and aerospace. High energy product magnets are the important basis to accelerate miniaturization and high efficiency of the device. Thus, obtain high performance SmCo magnet has always been a goal since the advent of Sm2Co17.

Although the remanence and magnetic energy product of high-performance samarium cobalt (XGS33H and XGS35H) are lower than the N42EH and N38AH grades of neodymium iron boron at lower temperatures, their remanence and magnetic energy product are significantly higher at higher temperatures than the N42EH and N38AH grades of neodymium iron boron. With the increase of temperature, the remanence and magnetic energy product of N42EH and N38AH grades of neodymium iron boron deteriorate rapidly, especially the coercivity. However, high-performance samarium cobalt still retains high magnetic properties and exhibits excellent thermal stability.