Structure and Magnetic Properties of Sm-Fe-N Prepared by Nitriding High Purity Sm2Fe17 Grown from Sm-Rich Melt

Wei Jiang; Ping Zhan Si; Hai Xia Wang; Qiong Wu; Jin Jun Liu; Jung Goo Lee; C.J. Choi; Hong Liang Ge

doi:10.4028/www.scientific.net/AMR.287-290.875

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Structure and Magnetic Properties of Sm-Fe-N...

Structure and Magnetic Properties of Sm-Fe-N Prepared by Nitriding High Purity Sm₂Fe₁₇ Grown from Sm-Rich Melt

Abstract:

We report on a novel method for preparation of high purity Sm₂Fe₁₇ phase by removing the liquid impurity phase from the Sm-rich precursor at high temperatures. With decreasing Sm addition, the percentage of liquid phase left as impurity is decreasing. Nitrogen absorption to the Sm₂Fe₁₇ powders results in a complete formation of Sm₂Fe₁₇N₃, which shows a weak disproportionation reaction at 773 K. The magnetic performance of the Sm₂Fe₁₇N₃ from precursors with different Sm content is improving with decreasing Sm content.