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

页码：547 / 550

页数：4

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