Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5466896 | Ultramicroscopy | 2017 | 14 Pages |
Abstract
The phase shift of the electron wave is a useful measure for the projected magnetic flux density of magnetic objects at the nanometer scale. More important for materials science, however, is the knowledge about the magnetization in a magnetic nano-structure. As demonstrated here, a dominating presence of stray fields prohibits a direct interpretation of the phase in terms of magnetization modulus and direction. We therefore present a model-based approach for retrieving the magnetization by considering the projected shape of the nano-structure and assuming a homogeneous magnetization therein. We apply this method to FePt nano-islands epitaxially grown on a SrTiO3 substrate, which indicates an inclination of their magnetization direction relative to the structural easy magnetic [001] axis. By means of this real-world example, we discuss prospects and limits of this approach.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Falk Röder, Karin Vogel, Daniel Wolf, Olav Hellwig, Sung Hun Wee, Sebastian Wicht, Bernd Rellinghaus,