X-ray magnetic circular dichroism and near-edge X-ray absorption fine structure of buried interfacial magnetism measured by using a scanning tunneling microscope tip
Abstract
Magnetism at buried interfaces plays a crucial role in many emerging phenomena, but detection of interfacial magnetism in close proximity to a surface with elemental and chemical sensitivity is a challenging task. Here, we use a low temperature synchrotron x-ray scanning tunneling microscopy to investigate x-ray magnetic circular dichroism and near edge x-ray absorption fine structure of La0.67Sr0.33MnO3-LaNiO3 superlattices in the absence of a magnetic field. In stark contrast to the weak magnetic signal of Mn when the La0.67Sr0.33MnO3 layers are located on top, a robust x-ray magnetic circular dichroism signal is detected when they are buried underneath the LaNiO3 layers. The near edge x-ray absorption fine structure reveals the valence states of the manganese while the oxygen K- edge x-ray absorption spectra show an increase in hole formation indicating a cogent charge transfer at the LaNiO3/La0.67Sr0.33MnO3 interface. This work demonstrates that scanning tunneling microscopy can be extended to the synchrotron X-ray study of buried interfaces by controlling the sample-tip (e.g., detector) separation in the nanometer regime. The close sample-tip proximity further provides a path toward probing of small lateral areas with zero-field measurements in multi-domain samples.
- Authors:
-
[2];
[2];
[4]
- Argonne National Lab. (ANL), Argonne, IL (United States); Ohio Univ., Athens, OH (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Harvard Univ., Cambridge, MA (United States)
- Ohio Univ., Athens, OH (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
- OSTI Identifier:
- 1465772
- Alternate Identifier(s):
- OSTI ID: 1463221
- Grant/Contract Number:
- AC02-06CH11357; SC70705; FG02-02ER46012
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 113; Journal Issue: 6; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; magnetism; XMCD; NEXAFS; STM; interface; SX-STM
Citation Formats
Chang, H., Shirato, N., Zhang, Y., Hoffman, J., Rosenmann, D., Freeland, J. W., Bhattacharya, A., Rose, V., and Hla, S. -W. X-ray magnetic circular dichroism and near-edge X-ray absorption fine structure of buried interfacial magnetism measured by using a scanning tunneling microscope tip. United States: N. p., 2018.
Web. doi:10.1063/1.5031877.
Chang, H., Shirato, N., Zhang, Y., Hoffman, J., Rosenmann, D., Freeland, J. W., Bhattacharya, A., Rose, V., & Hla, S. -W. X-ray magnetic circular dichroism and near-edge X-ray absorption fine structure of buried interfacial magnetism measured by using a scanning tunneling microscope tip. United States. https://doi.org/10.1063/1.5031877
Chang, H., Shirato, N., Zhang, Y., Hoffman, J., Rosenmann, D., Freeland, J. W., Bhattacharya, A., Rose, V., and Hla, S. -W. Mon .
"X-ray magnetic circular dichroism and near-edge X-ray absorption fine structure of buried interfacial magnetism measured by using a scanning tunneling microscope tip". United States. https://doi.org/10.1063/1.5031877. https://www.osti.gov/servlets/purl/1465772.
@article{osti_1465772,
title = {X-ray magnetic circular dichroism and near-edge X-ray absorption fine structure of buried interfacial magnetism measured by using a scanning tunneling microscope tip},
author = {Chang, H. and Shirato, N. and Zhang, Y. and Hoffman, J. and Rosenmann, D. and Freeland, J. W. and Bhattacharya, A. and Rose, V. and Hla, S. -W.},
abstractNote = {Magnetism at buried interfaces plays a crucial role in many emerging phenomena, but detection of interfacial magnetism in close proximity to a surface with elemental and chemical sensitivity is a challenging task. Here, we use a low temperature synchrotron x-ray scanning tunneling microscopy to investigate x-ray magnetic circular dichroism and near edge x-ray absorption fine structure of La0.67Sr0.33MnO3-LaNiO3 superlattices in the absence of a magnetic field. In stark contrast to the weak magnetic signal of Mn when the La0.67Sr0.33MnO3 layers are located on top, a robust x-ray magnetic circular dichroism signal is detected when they are buried underneath the LaNiO3 layers. The near edge x-ray absorption fine structure reveals the valence states of the manganese while the oxygen K- edge x-ray absorption spectra show an increase in hole formation indicating a cogent charge transfer at the LaNiO3/La0.67Sr0.33MnO3 interface. This work demonstrates that scanning tunneling microscopy can be extended to the synchrotron X-ray study of buried interfaces by controlling the sample-tip (e.g., detector) separation in the nanometer regime. The close sample-tip proximity further provides a path toward probing of small lateral areas with zero-field measurements in multi-domain samples.},
doi = {10.1063/1.5031877},
journal = {Applied Physics Letters},
number = 6,
volume = 113,
place = {United States},
year = {Mon Aug 06 00:00:00 EDT 2018},
month = {Mon Aug 06 00:00:00 EDT 2018}
}
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