Mapping spin-polarized transitions with atomic resolution

被引：44

作者：

Schattschneider, P. ^{[1
,2
]}

Schaffer, B. ^{[3
,4
]}

Ennen, I. ^{[1
]}

Verbeeck, J. ^{[5
]}

机构：

[1] Vienna Univ Technol, Inst Festkorperphys, A-1040 Vienna, Austria

[2] Vienna Univ Technol, Univ Serv Ctr Elect Microscopy, A-1040 Vienna, Austria

[3] STFC Daresbury Labs, SuperSTEM, Warrington WA4 4AD, Cheshire, England

[4] Univ Glasgow, SUPA Sch Phys & Astron, Kelvin Nanocharacterisat Ctr, Glasgow G12 8QQ, Lanark, Scotland

[5] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 13期

基金：

欧洲研究理事会; 奥地利科学基金会;

关键词：

ELECTRON-MICROSCOPE; CIRCULAR-DICHROISM; BEAMS; STEM;

D O I：

10.1103/PhysRevB.85.134422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coupling of angstrom-sized electron probes with spin-polarized electronic transitions shows that the inelastically scattered probe electron is in a mixed state containing electron vortices with nonzero orbital angular momentum. These electrons create an asymmetric intensity distribution in energy filtered diffraction patterns, giving access to maps of the magnetic moments with atomic resolution. A feasibility experiment shows evidence of the predicted effect. Potential applications are column-by-column maps of magnetic ordering, and the creation of angstrom-sized free electrons with orbital angular momentum by inelastic scattering in a thin ferromagnetic foil.

引用

页数：8

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