GMR behavior of nanostructured heterogeneous M-Co(M=Cu,Ag,Au) alloys

被引：11

作者：

Bernardi, J

Hutten, A

Thomas, G

机构：

[1] VIENNA TECH UNIV,INST APPL & TECH PHYS,A-1040 VIENNA,AUSTRIA

[2] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

NANOSTRUCTURED MATERIALS | 1996年 / 7卷 / 1-2期

关键词：

D O I：

10.1016/0965-9773(95)00310-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heterogeneous M-Co alloys (M = Cu, Ag, Au) have been observed by transmission electron microscopy (TEM). The magnetic properties and the GMR effect are compared with the evolution of the microstructure after preparation of the samples and after annealing. Limiting effects in TEM that prevent resolving ferromagnetic Coprecipitates in Cu-Co or Ag-Co can be overcome by choosing the system Au-Co. Annealing causes a coarsening of the Co precipitates and an increase in the interparticle distance. Lorentz microscopy confirms single domain Co particles exist in as-quenched Au71.6Co28.4 ribbons, and multidomain Co particles in annealed ribbons, respectively. The changes in the grain size and the formation of multidomain particles can be exactly correlated with magnetic measurements.

引用

页码：205 / 220

页数：16

共 17 条

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