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Updated: Apr 25, 2026
09:49
In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
Published on: May 13, 2020
3.2K
Spin-flop coupling and exchange bias in embedded complex oxide micromagnets.
Yayoi Takamura1, Erik Folven2, Jonathan B R Shu1
1Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616, USA.
Physical Review Letters
|August 29, 2014
Summary
Researchers studied magnetic domains in La0.7Sr0.3MnO3 (LSMO) thin films and bilayers. Unique vortex and "Z"-type domains suggest coupled spin-flop and exchange bias effects at interfaces.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Epitaxial La0.7Sr0.3MnO3 (LSMO) thin films and LaFeO3/LSMO bilayers are promising for spintronic applications.
- Understanding magnetic domain behavior is crucial for device performance.
Purpose of the Study:
- To investigate the magnetic domain patterns in micromagnets fabricated from LSMO and LaFeO3/LSMO heterostructures.
- To explore the influence of interface exchange coupling on domain configurations.
Main Methods:
- Soft x-ray magnetic microscopy was employed to visualize magnetic domains.
- Fabrication of 2μm×2μm square micromagnets with edges aligned to LSMO easy axes.
Main Results:
- Observed unique magnetic domain patterns, including divergent antiferromagnetic vortex domains and "Z"-type domains.
- These patterns differ from those typically seen in ferromagnetic metal microstructures.
- The observed phenomena suggest the interplay of spin-flop coupling and local exchange bias.
Conclusions:
- The study reveals novel magnetic domain behaviors in LSMO-based heterostructures.
- Interface exchange coupling significantly influences magnetic domain formation.
- The findings indicate the simultaneous presence of spin-flop coupling and exchange bias in this system.
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