Detecting magnetic ordering with atomic size electron probes
Abstract
While magnetism originates at the atomic scale, the existing spectroscopic techniques sensitive to magnetic signals only produce spectra with spatial resolution on a larger scale. However, recently, it has been theoretically argued that atomic size electron probes with customized phase distributions can detect magnetic circular dichroism. Here, we report a direct experimental real-space detection of magnetic circular dichroism in aberration-corrected scanning transmission electron microscopy (STEM). Using an atomic size-aberrated electron probe with a customized phase distribution, we reveal the checkerboard antiferromagnetic ordering of Mn moments in LaMnAsO by observing a dichroic signal in the Mn L-edge. The novel experimental setup presented here, which can easily be implemented in aberration-corrected STEM, opens new paths for probing dichroic signals in materials with unprecedented spatial resolution.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS)
- Uppsala Univ. (Sweden). Dept. Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computational Sciences and Engineering Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Swedish Research Council (SRC); Goran Gustafsson Foundation; Swedish National Infrastructure for Computing
- OSTI Identifier:
- 1311213
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Structural and Chemical Imaging
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 1; Journal ID: ISSN 2198-0926
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; EMCD; STEM; EELS; antiferromagnetism; atomic resolution; Aberration correction; Aberrated probes; Vortex beams
Citation Formats
Idrobo, Juan Carlos, Rusz, Ján, Spiegelberg, Jakob, McGuire, Michael A., Symons, Christopher T., Vatsavai, Ranga Raju, Cantoni, Claudia, and Lupini, Andrew R. Detecting magnetic ordering with atomic size electron probes. United States: N. p., 2016.
Web. doi:10.1186/s40679-016-0019-9.
Idrobo, Juan Carlos, Rusz, Ján, Spiegelberg, Jakob, McGuire, Michael A., Symons, Christopher T., Vatsavai, Ranga Raju, Cantoni, Claudia, & Lupini, Andrew R. Detecting magnetic ordering with atomic size electron probes. United States. https://doi.org/10.1186/s40679-016-0019-9
Idrobo, Juan Carlos, Rusz, Ján, Spiegelberg, Jakob, McGuire, Michael A., Symons, Christopher T., Vatsavai, Ranga Raju, Cantoni, Claudia, and Lupini, Andrew R. Fri .
"Detecting magnetic ordering with atomic size electron probes". United States. https://doi.org/10.1186/s40679-016-0019-9. https://www.osti.gov/servlets/purl/1311213.
@article{osti_1311213,
title = {Detecting magnetic ordering with atomic size electron probes},
author = {Idrobo, Juan Carlos and Rusz, Ján and Spiegelberg, Jakob and McGuire, Michael A. and Symons, Christopher T. and Vatsavai, Ranga Raju and Cantoni, Claudia and Lupini, Andrew R.},
abstractNote = {While magnetism originates at the atomic scale, the existing spectroscopic techniques sensitive to magnetic signals only produce spectra with spatial resolution on a larger scale. However, recently, it has been theoretically argued that atomic size electron probes with customized phase distributions can detect magnetic circular dichroism. Here, we report a direct experimental real-space detection of magnetic circular dichroism in aberration-corrected scanning transmission electron microscopy (STEM). Using an atomic size-aberrated electron probe with a customized phase distribution, we reveal the checkerboard antiferromagnetic ordering of Mn moments in LaMnAsO by observing a dichroic signal in the Mn L-edge. The novel experimental setup presented here, which can easily be implemented in aberration-corrected STEM, opens new paths for probing dichroic signals in materials with unprecedented spatial resolution.},
doi = {10.1186/s40679-016-0019-9},
journal = {Advanced Structural and Chemical Imaging},
number = 1,
volume = 2,
place = {United States},
year = {Fri May 27 00:00:00 EDT 2016},
month = {Fri May 27 00:00:00 EDT 2016}
}
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