Observation of long-period superstructures in chemically synthesised CoPt nanoparticles

被引：14

作者：

Frommen, C ^{[1
]}

Rösner, H ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe Helmholtz Gesell, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

MATERIALS LETTERS | 2004年 / 58卷 / 1-2期

关键词：

defects; heat treatment; electron microscopy; microstructure; intermetallic alloys and compounds; magnetic materials; nanomaterials;

D O I：

10.1016/S0167-577X(03)00428-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface-protected nanoparticles of CoPt were synthesised by means of a polyol process and subjected to a post heat treatment procedure at temperatures up to 700degreesC under flowing argon gas. This led to the transformation from a disordered fcc into a L1(0) long-range ordered (LRO) phase, which was verified by X-ray diffraction and high-resolution electron microscopy (HRTEM) studies on post-annealed specimens. HRTEM and electron diffraction images of large nanocrystals of CoPt show features unique to a long-period ordered structure with characteristic satellite peaks appearing around the (100) L1(0) superlattice reflections that are attributed to the formation of antiphase domains. (C) 2003 Elsevier B.V All rights reserved.

引用

页码：123 / 127

页数：5

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