Structure and hysteresis properties of nanocrystalline FePt powders
Structure and hysteresis properties of nanocrystalline FePt powders
复制标题
纳米晶FePt粉末的结构和磁滞特性
DOI：
10.1016/j.jmmm.2004.11.524
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发表时间：
2005
影响因子：
2.7
通讯作者：
L. Schultz
中科院分区：
文献类型：
--
作者：
J. Lyubina;O. Gutfleisch;K. Müller;L. Schultz
采用机械球磨法在77K下制备了Fe 100 −xPtx（x= 39.5，45，50，55和60）纳米晶硬磁粉末。随着x的增加，L10体积分数增加，对于Fe 50 Pt 50达到约85vol%的最大值。随着x的增加，FePt3相的含量增加（在Fe40Pt60中达到40vol%），而Fe3Pt含量减少（从Fe60.5Pt39.5中的38vol%）。随着x的增加，矫顽力从0.33T（x=39.5）增加到0.95T（x=60），而剩磁从0.8T（x=39.5）减少到0.4T（x=60）。交换弹簧的行为被观察到的小值的x。
Nanocrystalline hard magnetic Fe100−xPtx(x=39.5, 45, 50, 55 and 60) powders have been prepared by mechanical ball milling at 77K. With increasing x, the L10volume fraction increases, reaching a maximum of about 85vol% for Fe50Pt50. The FePt3phase amount increases (up to 40vol% in Fe40Pt60), whereas the Fe3Pt fraction reduces (from 38vol% in Fe60.5Pt39.5) with increasing x. The coercivity was found to increase with x from 0.33T (x=39.5) to 0.95T (x=60), whereas the remanence reduces: from 0.8T (x=39.5) to 0.4T (x=60). Exchange-spring behaviour is observed for small values of x.