EFFECTS OF Al CONTENT ON STRUCTURAL STABILITY AND MAGNETIC PROPERTIES OF Sm₂(Fe, Al)₁₇ COMPOUNDS

来源期刊：中国有色金属学报(英文版)1999年第1期

论文作者：Xu Rengen Wang Xinhua Wu Jianmin Pan Hongge Chen Changpin Wang Qidong Dai Lichi

文章页码：40 - 43

Key words：Sm₂Fe₁₇;　Al;　hydride;　Curie temperature;　structural stability

Abstract: The magnetic properties of Sm₂Fe_17-xAl_x(x=0, 1, 2, 3) compounds and their hydrides are systematically investigated. The results reveal that all compounds have the Th₂Zn₁₇-type structure. As the content of Al increases, the Curie temperature of Sm₂(Fe,Al) ₁₇ compounds increases, and their saturation magnetization decreases. It is first discovered that the Curie temperatures of the hydrides of Sm₂(Fe,Al) ₁₇ compounds measured from heating process are higher than those measured from cooling process, and their difference is denoted as ΔT*_c. The correlation between ΔT*_c and the structural stability of Sm₂(Fe,Al) ₁₇ com- pounds as well as their corresponding hydrides is discussed.