Reciprocal and real space maps for EMCD experiments

被引：33

作者：

Lidbaum, Hans ^{[1
]}

Rusz, Jan ^{[2
,3
]}

Rubino, Stefano ^{[1
]}

Liebig, Andreas ^{[2
]}

Hjorvarsson, Bjorgvin ^{[2
]}

Oppeneer, Peter M. ^{[2
]}

Eriksson, Olle ^{[2
]}

Leifer, Klaus ^{[1
]}

机构：

[1] Uppsala Univ, Dept Engn Sci, S-75121 Uppsala, Sweden

[2] Uppsala Univ, Dept Phys & Mat Sci, S-75121 Uppsala, Sweden

[3] Acad Sci Czech Republ, Inst Phys, CA-18221 Prague, Czech Republic

来源：

ULTRAMICROSCOPY | 2010年 / 110卷 / 11期

基金：

瑞典研究理事会;

关键词：

EMCD; Magnetic circular dichroism; Electron energy-loss spectra; Transmission electron microscopy; RAY CIRCULAR-DICHROISM; IRON;

D O I：

10.1016/j.ultramic.2010.07.004

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Electron magnetic chiral dichroism (EMCD) is an emerging tool for quantitative measurements of magnetic properties using the transmission electron microscope (TEM), with the possibility of nanometer resolution. The geometrical conditions, data treatment and electron gun settings are found to influence the EMCD signal. In this article, particular care is taken to obtain a reliable quantitative measurement of the ratio of orbital to spin magnetic moment using energy filtered diffraction patterns. For this purpose, we describe a method for data treatment, normalization and selection of mirror axis. The experimental results are supported by theoretical simulations based on dynamical diffraction and density functional theory. Special settings of the electron gun, so called telefocus mode, enable a higher intensity of the electron beam, as well as a reduction of the influence from artifacts on the signal. Using these settings, we demonstrate the principle of acquiring real space maps of the EMCD signal. This enables advanced characterization of magnetic materials with superior spatial resolution. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1380 / 1389

页数：10

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