【摘要】 本文用磁测量和穆斯堡尔方法研究了Y₂Fe₁₇和Dy₂Fe₁₇C合金及氮化后的结构和磁性。Y₂Fe₁₇和Y₂Fe₁₇N_ε（ε<3）具有六方结构,Dy₂Fe₁₇C和Dy₂Fe₁₇CN_ε为菱形结构。Y₂Fe₁₇氮化后的居里温度增加363K,Dy₂Fe₁₇C氮化后的居里温度增加201K。氮化后的合金中铁原子的平均磁矩和超精细场显著增加;同质异能移位略有增加。本文还探讨了氮化后合金磁性改善的原因。更多还原

【Abstract】 The magnetic and crystallographic characteristica of Y₂Fe₁₇, Dy₂Fe₁₇C and their nitrides have been studied. After introducing interstitial nitrogen atoms, the original Th₂Zn₁₇ and Th₂Ni₁₇ structures can be retained, but the lattice constants （a,c） are expanded; the hyperfine field and the average moment of iron atom are raised remarkably, and the isomeric shift is raised slightly. The curie temperatures of nitrides are increased by about 363K of Y₂Fe₁₇ and 201K of Dy₂Fe₁₇C. The improvement mechanism of nitrogen atom on the intrinsic magnetic properties of Y₂Fe₁₇ and Dy₂Fe₁₇C was discussed更多还原