Effect of nanocrystallization on the structure and the magnetic properties of Nd-Fe-Co-Al-B glassy alloy

被引：13
作者：
Bessais, L.
Djega-Mariadassou, C.
Beaunier, P.
机构：
[1] CNRS, UPR 209, LCMTR, F-94320 Thiais, France
[2] Univ Paris 06, Serv Cent Microscopie Electron, F-75230 Paris 05, France
来源：
JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 09期
关键词：
D O I：
10.1063/1.2195367
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nd40Fe30Co15Al10B5 bulk amorphous prepared by high energy milling shows a coercivity of 650 kA/m with a Curie temperature of 645 K. The controlled nanocrystallization enhances the coercivity to 1600 kA/m and the remanence ratio is equal to 0.59. The coexistence of two crystalline magnetic phases, ferromagnetic Nd-2(Fe,Co,Al)(14)B, and antiferromagnetic Nd-6(Fe,Co,Al)(14) are revealed by x-ray diffraction, high-resolution transmission electron microscopy, magnetization measurements, and Mossbauer spectrometry. The grain size for optimal magnetic properties is around 30 nm. The nucleation process may play a leading role in the high magnetic behavior. (C) 2006 American Institute of Physics.
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页数：7
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