Preparation of microstructured and nanostructured magnetic materials by mechanical deformation

被引：13

作者：

Giguère, A

Hai, NH

Dempsey, N

Givord, D

机构：

[1] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France

[2] Univ Hanoi, Cryolab, Fac Phys, Hanoi, Vietnam

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 242卷

关键词：

hydrostatic extrusion; cold-rolling; giant magnetoresistance; magnetostriction;

D O I：

10.1016/S0304-8853(01)01114-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel hydrostatic extrusion process utilising sacrificial Al billets has been developed to allow the size reduction by deformation of samples of various cross-sectional shape (e.g. square, rectangular). Cyclic deformation of a stack of sub-mm thick foils of magnetic and non-magnetic metals (Fe and Ag), combining extrusion with cold-rolling, has been used to prepare nanoscaled multilayered structures. 6% GMR was measured in the Fe/Ag multilayer system, after 4 deformation cycles, in the current-in-plane geometry at 4 K. Extrusion was also used to prepare micro-composite Sm/Fe structures which were subsequently heat treated to form magnetostrictive SmFe2 rods with room temperature magnetostriction values as large as -800ppm in the extrusion direction. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：581 / 584

页数：4

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