磁性纳米线以及磁性纳米颗粒链、环和平面阵列的离轴电子全息术。

Off-axis electron holography of magnetic nanowires and chains, rings, and planar arrays of magnetic nanoparticles.

作者信息

Dunin-Borkowski Rafal E, Kasama Takeshi, Wei Alexander, Tripp Steven L, Hÿtch Martin J, Snoeck Etienne, Harrison Richard J, Putnis Andrew

机构信息

Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, United Kingdom.

出版信息

Microsc Res Tech. 2004 Aug;64(5-6):390-402. doi: 10.1002/jemt.20098.

DOI:10.1002/jemt.20098

PMID:15549694

Abstract

A selection of recent results illustrating the application of off-axis electron holography to the study of magnetic microstructure in closely-spaced nanoparticles and nanowires is reviewed. Examples are taken from the characterization of FeNi nanoparticle chains, Co nanoparticle rings, two-dimensional arrays of naturally occurring magnetite crystals in minerals, and single crystalline Co nanowires. Approaches that can be used to separate the magnetic signal of interest from the mean inner potential contribution to the measured holographic phase shift are described, and the spatial and phase resolution that can be achieved are discussed.

摘要

本文综述了一系列近期研究成果，这些成果展示了离轴电子全息术在研究紧密排列的纳米颗粒和纳米线磁微结构方面的应用。实例取自FeNi纳米颗粒链、Co纳米颗粒环、矿物中天然存在的磁铁矿晶体二维阵列以及单晶Co纳米线的表征。文中描述了可用于从测量的全息相移的平均内势贡献中分离出感兴趣的磁信号的方法，并讨论了可实现的空间分辨率和相位分辨率。