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|Title:||Structure and magnetic properties of chill-cast and melt-spun Ndx(Fe3Al)100-x and Nd33(FeyAl)67 alloys|
|Authors:||Si, L. |
|Citation:||Si, L.,Ding, J.,Li, Y.,Yao, B. (2001). Structure and magnetic properties of chill-cast and melt-spun Ndx(Fe3Al)100-x and Nd33(FeyAl)67 alloys. Materials Transactions 42 (4) : 664-669. ScholarBank@NUS Repository.|
|Abstract:||The magnetic properties of chill-cast Nd-Fe-Al rods have been studied as a function of Nd and Al concentrations. High coercivities were obtained in Nd60(Fe3Al)40, Nd50(Fe3Al)50 and Nd33(Fe10Al)67 alloys. The study on the melt-spun ribbons of these alloys has shown that coercivity is dependent on the quenching rate, and high coercivity could only be obtained in alloys prepared after a relatively low quenching rate. Several crystalline Nd-Fe-Al phases have been investigated in this work. A metastable tetragonal phase existed as nearly the single phase in Nd33(FeyAl)67 with y = 2-4. The tetragonal phase is antiferromagnetic with a Néel temperature of 260 K. Metamagnetism and magnetoresistivity have been observed. The study on the annealed Nd33(FeAl)67 alloy has shown that a hexagonal phase and an unknown were formed and these two Fe-containing phases, among which one is an antiferromagnetic with a Néel temperature of 280 K and the another is ferromagnetic below 130-140 K.|
|Source Title:||Materials Transactions|
|Appears in Collections:||Staff Publications|
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