Abstract
The magnetic properties of ferromagnetic compounds of Sm2Fe17, Sm2Fe17C0.6, and Sm2Fe17C0.6H4.4 were investigated. Sm2Fe17 nitrides, carbides, and carbohydrides are suitable for making high performance permanent magnets. The high field magnetization measurements performed up to 200 kOe in continuous fields are reported. In this article, the isothermal magnetization curves measured between 2 and 300 K on powder samples embedded in a resin and then aligned under a magnetic field of about 10 kOe in order to get oriented samples are presented. The magnetic anisotropy constants K1 and K2 are determined taking into account the angular distribution of the grains axis. The results are discussed in light of previously reported data and then the effects of C or H on the Sm contribution to the anisotropy is compared to that of N. It is shown that carbon and hydrogen have opposite influence on the Sm anisotropy and it is suggested that a wide range of magnetic anisotropy can be obtained depending on the H and C content. The influence of both interstitial elements H and C on magnetic features such as the Curie temperature and the saturation magnetization is analyzed.
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