ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Strain-induced altermagnetism in epitaxial RuO2/TiO2 superlattices
Abstract: Rutile RuO2, previously suggested to host an altermagnetic phase, remains controversial regarding its magnetic state. While bulk RuO2 is theoretically predicted to exhibit antiferromagnetic order, recent experimental studies on sputter-grown films and bulk samples report non-magnetic behavior. However, preliminary investigations on epitaxially-strained RuO2/TiO2 superlattices using second-harmonic generation (SHG) and magneto-optical Kerr effect (MOKE) measurements revealed magnetic signals with temperature anomalies near 500 K. These suggest that epitaxial strain plays a crucial role in stabilizing long-range magnetic order in RuO2 layers. However, conventional magnetic measurements only provide an averaged response across the superlattice, leaving complex spin configurations unresolved, especially those linked to interfaces. To address the current issues, this one-day proof-of-principle proposal aims to validate the strain-induced magnetic state and its spin configuration in epitaxially-strained RuO2/TiO2 superlattices using polarized neutron reflectivity (PNR). PNR will provide detailed depth profiles of the magnetic structure, enabling us to clarify the role of epitaxial strain and interfaces in the magnetic behavior of RuO2.
Principal Investigator: Dr Seunggyo Jeong
Experimenter: Dr Christy Kinane
Experimenter: Professor Bharat Jalan
Experimenter: Dr Alexander Grutter
Local Contact: Dr Andrew Caruana
DOI: 10.5286/ISIS.E.RB2500020
ISIS Experiment Number: RB2500020
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| - | POLREF | 13 October 2028 | Download |
| 10.5286/ISIS.E.RB2500020-2 | POLREF | 22 June 2029 | Download |
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
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Data Citation
The recommended format for citing this dataset in a research
publication is as:
[author], [date], [title], [publisher],
[doi]
For Example:
Dr Seunggyo Jeong et al; (2025): Strain-induced altermagnetism in epitaxial RuO2/TiO2 superlattices, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2500020
Data is released under the CC-BY-4.0 license.
