Structure and hysteresis properties of nanocrystalline FePt powders

被引：18
|
作者：
Lyubina, J [1 ]
Gutfleisch, O [1 ]
Müller, KH [1 ]
Schultz, L [1 ]
机构：
[1] IFW Dresden, Inst Met Mat, D-01171 Dresden, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷
关键词：
permanent magnets; mechanical alloying; solid-state reactions; X-ray phase analysis; ordered phase; L1(0) phase;
D O I：
10.1016/j.jmmm.2004.11.524
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocrystalline hard magnetic Fe100-xPtx (x = 39.5, 45, 50, 55 and 60) powders have been prepared by mechanical ball milling at 77 K. With increasing x, the L1(0) volume fraction increases, reaching a maximum of about 85 vol% for Fe50Pt50. The FePt3 phase amount increases (LIP to 40 vol% in Fe40Pt60), whereas the Fe3Pt fraction reduces (from 38 vol% in Fe60.5Pt39.5) with increasing x. The coercivity was found to increase with x from 0.33 T (x = 39.5) to 0.95 T (x = 60), whereas the remanence reduces: from 0.8 T (x = 39.5) to 0.4 T (x = 60). Exchange-spring behaviour is observed for small values of x. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：547 / 550
页数：4
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