3D Magnetic Induction Maps of Nanoscale Materials Revealed by Electron Holographic Tomography

Overview

Journal Chem Mater

Date 2016 May 17

PMID 27182110

Citations 13

Authors

Daniel Wolf

Luis A Rodriguez

Armand Beche

Elsa Javon

Luis Serrano

Cesar Magen

Christophe Gatel

Axel Lubk

Hannes Lichte

Sara Bals

Gustaaf Van Tendeloo

Amalio Fernandez-Pacheco

Jose M de Teresa

Etienne Snoeck

Affiliations

Soon will be listed here.

Abstract

The investigation of three-dimensional (3D) ferromagnetic nanoscale materials constitutes one of the key research areas of the current magnetism roadmap and carries great potential to impact areas such as data storage, sensing, and biomagnetism. The properties of such nanostructures are closely connected with their 3D magnetic nanostructure, making their determination highly valuable. Up to now, quantitative 3D maps providing both the internal magnetic and electric configuration of the same specimen with high spatial resolution are missing. Here, we demonstrate the quantitative 3D reconstruction of the dominant axial component of the magnetic induction and electrostatic potential within a cobalt nanowire (NW) of 100 nm in diameter with spatial resolution below 10 nm by applying electron holographic tomography. The tomogram was obtained using a dedicated TEM sample holder for acquisition, in combination with advanced alignment and tomographic reconstruction routines. The powerful approach presented here is widely applicable to a broad range of 3D magnetic nanostructures and may trigger the progress of novel spintronic nonplanar nanodevices.

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