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.
Probing Interfacial Magnetism and Magnetic Coupling Phenomena in Antiferromagnet - Nanocrystalline Topological Insulator Heterostructures
Abstract: Topological electronics makes use of novel quantum degrees of freedom, as they are encountered in topological insulators (TIs). One of the most remarkable properties of a TI is the dissipationless carrier transport through its surface states. In magnetically doped TIs, the quantum anomalous Hall effect (QAHE) was observed; a zero-field version of the ordinary quantum Hall effect. However, due to defects associated with the doping, the useful temperature range is rather small. Proximity induced magnetisation is a promising method to create ferromagnetic order in TI. Using an antiferromagnet as magnetic adlayer reduces stray fields that can interfere with the QAH states. We recently discovered that diffusion of magnetic constituents in heterostructures of Mn-based magnetic materials and TI can mimic the elusive proximity induced magnetisation effect at the interface. To address this problem, we propose to utilise NiO/nanocrystalline Bi2Te3-heterostructures grown using sputtering to substantially reduce diffusion and to achieve high-quality interfaces. This should facilitate the observation of proximity induced magnetisation using polarised neutron reflectometry.
Principal Investigator: Dr Dirk Backes
Experimenter: Professor Thorsten Hesjedal
Experimenter: Mr Joshua Bibby
Local Contact: Dr Christy Kinane
Experimenter: Professor Gerrit van der Laan
Experimenter: Miss Emily Heppell
Experimenter: Professor Sean Langridge
DOI: 10.5286/ISIS.E.RB2320224
ISIS Experiment Number: RB2320224
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2320224-1 | POLREF | 26 February 2027 | 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 Dirk Backes et al; (2024): Probing Interfacial Magnetism and Magnetic Coupling Phenomena in Antiferromagnet - Nanocrystalline Topological Insulator Heterostructures, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2320224
Data is released under the CC-BY-4.0 license.
