Real-space visualization of intrinsic magnetic fields of an antiferromagnet

Yuji Kohno, Takehito Seki, Scott D. Findlay, Yuichi Ikuhara and Naoya Shibata ()
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Yuji Kohno: JEOL Ltd.
Takehito Seki: The University of Tokyo
Scott D. Findlay: Monash University
Yuichi Ikuhara: The University of Tokyo
Naoya Shibata: The University of Tokyo

Nature, 2022, vol. 602, issue 7896, 234-239

Abstract: Abstract Characterizing magnetic structures down to atomic dimensions is central to the design and control of nanoscale magnetism in materials and devices. However, real-space visualization of magnetic fields at such dimensions has been extremely challenging. In recent years, atomic-resolution differential phase contrast scanning transmission electron microscopy (DPC STEM)1 has enabled direct imaging of electric field distribution even inside single atoms2. Here we show real-space visualization of magnetic field distribution inside antiferromagnetic haematite (α-Fe2O3) using atomic-resolution DPC STEM in a magnetic-field-free environment3. After removing the phase-shift component due to atomic electric fields and improving the signal-to-noise ratio by unit-cell averaging, real-space visualization of the intrinsic magnetic fields in α-Fe2O3 is realized. These results open a new possibility for real-space characterization of many magnetic structures.

Date: 2022
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DOI: 10.1038/s41586-021-04254-z

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