Precipitation of nanoscale Co particles in a granular Cu-Co alloy with giant magnetoresistance

被引：18

作者：

Yang, GY ^{[1
]}

Zhu, J

Wang, WD

Zhang, Z

Zhu, FW

机构：

[1] Tsing Hua Univ, Sch Mat Sci & Engn, Electron Microscopy Lab, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Beijing Lab Electron Microscopy, Inst Phys, Beijing 100080, Peoples R China

[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China

[4] Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2000年 / 35卷 / 06期

关键词：

nanostructures; electron microscopy; magnetic properties; microstructure;

D O I：

10.1016/S0025-5408(00)00283-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The precipitation of Co particles in the heterogeneous Cu88Co12 ribbon has been successfully investigated by using HRTEM and EDS. The presence of Co particles in Cu matrix was revealed by darker contrast in HRTEM image and the variations of chemical composition in the corresponding regions in the samples annealed at 450 degrees C for different time. Longer annealing caused a coarsening and further gathering of the Co particles in the alloy. The comparison of GMR effect with the microstructural evolution of Cu88Co12 ribbon indicates that the size and the distribution of Co particles in Cu matrix play an important role in explaining GMR effect. Cu matrix and fee Co precipitates have a cubic-cubic orientation relationship. The misfit of the lattice parameters between Cu matrix and Co precipitate was matched by the occurrence of interfacial dislocation and lattice distortion at the Cu/Co interface. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：875 / 885

页数：11

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