2:17-type SmCo quasi-single-crystal high temperature magnets

2:17-type SmCo high temperature magnets have drawn lots of attentions for potential applications at 500 degrees C. Usually, 2:17-type SmCo magnets are prepared by powder metallurgy. In this letter, 2:17-type SmCo quasi-single-crystal magnet of Sm(CobalFe0.1Cu0.1Zr0.033)(6.93) with [001] orientation is reported, prepared by zone melting directionally solidification. The domain structure and excellent intrinsic magnetic properties of the quasi-single-crystal magnet are investigated. The quasi-single-crystal magnet exhibits a high performance with coercivity of 3.5 T, remanence of 9.5 kG, and energy density of 21.7 MG Oe at room temperature. The coercivity of 1.1 T at 500 degrees C is achieved, which is the highest value compared with the previously reported SmCo high temperature magnets. (C) 2015 AIP Publishing LLC.