Related Experiment Video
Updated: Jan 17, 2026
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Evidence for single variant in altermagnetic RuO2(101) thin films
Cong He1,2, Zhenchao Wen3, Jun Okabayashi4
1National Institute for Materials Science (NIMS), Tsukuba, Japan.
Nature Communications
|September 24, 2025
Summary
Researchers successfully fabricated single-variant altermagnetic Ruthenium Dioxide (RuO2) thin films. This breakthrough in altermagnetism is crucial for developing advanced spintronic devices with enhanced spin transport properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Altermagnetism offers unique properties like strong spin-splitting and zero net magnetization for spintronic applications.
- Fabricating single-variant altermagnetic thin films is essential for harnessing these properties but presents significant challenges.
Purpose of the Study:
- To demonstrate the successful formation of single-variant altermagnetic Ruthenium Dioxide (RuO2) thin films.
- To investigate the structural and magnetic properties of these films.
- To explore the potential of these films in spintronic devices.
Main Methods:
- Epitaxial growth of RuO2(101) thin films on Al2O3(1 02) r-plane substrates.
- Structural characterization using X-ray diffraction (XRD) and atomic-resolution transmission electron microscopy (TEM).
- Magnetic analysis via X-ray magnetic linear dichroism (XMLD).
- First-principles density functional theory (DFT) calculations.
Main Results:
- Definitive evidence for the formation of single-variant epitaxial RuO2(101) thin films.
- Identification of the crucial role of oxygen atom occupancy in achieving single-variant growth.
- Observation of spin-splitting magnetoresistance in RuO2(101)/CoFeB bilayers, confirming the impact on spin transport.
Conclusions:
- The successful fabrication of single-variant RuO2(101) thin films represents a significant advancement in altermagnetism.
- This achievement provides a viable material platform for future spintronic device development.
- The findings pave the way for exploring novel applications leveraging the unique properties of altermagnetic materials.
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