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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
- Source :
- Applied Physics Letters. 113:061602
- Publication Year :
- 2018
- Publisher :
- AIP Publishing, 2018.
-
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 low temperature synchrotron x-ray scanning tunneling microscopy to investigate x-ray magnetic circular dichroism and the near edge x-ray absorption fine structure of La0.67Sr0.33MnO3-LaNiO3 superlattices. 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 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 tip-sample separation in the nanometer regime.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
Extended X-ray absorption fine structure
Absorption spectroscopy
Magnetism
Magnetic circular dichroism
Astrophysics::High Energy Astrophysical Phenomena
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Molecular physics
XANES
X-ray absorption fine structure
law.invention
Condensed Matter::Materials Science
X-ray magnetic circular dichroism
law
0103 physical sciences
Scanning tunneling microscope
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 113
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........3cf598d0a849990478c8f25a1e17ddb4
- Full Text :
- https://doi.org/10.1063/1.5031877