非晶合金Fe_(76.5-x)Cu_(1.0)Nb_xSi_(13.5)B_(9.0)的穆斯堡尔研究  

Mssbauer Study of Amorphous Alloys Fe 76 5 x Cu 1 0 Nb xSi 13 5 B 9 0

作　　者：金慧娟[1,2] 许桂琴[1,2] 张延忠 杨燮龙[1,2] 

机构地区：[1]上海钢铁研究所 [2]华东师范大学

出　　处：《金属功能材料》1997年第5期212-215,共4页Metallic Functional Materials

摘　　要：非晶合金Ｆｅ７６．５－ｘＣｕ１．０ＮｂｘＳｉ１３．５Ｂ９．０（ｘ＝１，３，５和７）的穆斯堡尔研究表明，Ｎｂ元素对非晶合金的磁有序温度Ｔｃ和磁超精细相互作用有很大的影响，随着Ｎｂ含量的增加，Ｔｃ减小，ｘ＝１，３，５时分别为６５５，５９７，５２５Ｋ；但当ｘ＝７时，出现了两个Ｔｃ分别为４７０和５３９Ｋ，由所计算的磁超精细场分布Ｐ（Ｈ）表明，最大几率处的内磁场Ｈｏ和平均内磁场＜Ｈ＞都随Ｎｂ含量的增加而减小，而分布的宽度△Ｈ则反之，并出现了磁超精细场分布Ｐ（Ｈ）的低场峰，且低场的几率也随之增大，这些结果表明了Ｎｂ元素使非晶体Ｆｅ－Ｆｅ间的平均磁相互作用减弱且在非晶体中富集。Mossbauer studies of Fe 76 5 x Cu 1 0 Nb xSi 13 5 B 9 0 (x=1,3,5and7) amorphous alloys have shown that the element of niobium has dramatic influence on magnetic ordering temperature T c and magnetic hyperfine interaction in amorphous alloys T c decreases with increasing the amount of Nb and the value of T c is 655, 597 and 525K for x=1,3 and 5,respectively Whereas both values of 470 and 539K of T c appear when x=7 Distribution of magnetic hyperfine fields obtained from the computer fit of the Mossbauer spectra have also shown that with increasing Nb concentration, the internal field H o corresponding to maximun P(H) and the average field <H> decrease, while the distribution width △ (H) in creases The low field component in P(H) curve appears and its population increases obvio usly with the increase of Nb These results have shown that Nb reduces average magnetic interaction between Fe Fe atoms and it is enriched in amorphous matrix

关 键 词：非晶合金 穆斯堡尔谱 磁有序温度 磁超精细场 

分 类 号：TG139.8[一般工业技术—材料科学与工程]