Controlling and integrating 2D magnetism in epitaxial van der Waals heterostructures
Lead Research Organisation:
University of Oxford
Department Name: Oxford Physics
Abstract
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Publications
Backes D
(2024)
Valence-state mixing and reduced magnetic moment inFe3-dGeTe2single crystals with varying Fe content probed by x-ray spectroscopy.
in Nanotechnology
Burn DM
(2023)
Spin pumping through nanocrystalline topological insulators.
in Nanotechnology
Fujita R
(2024)
Strain-Modulated Ferromagnetism at an Intrinsic van der Waals Heterojunction
in Advanced Functional Materials
Heppell E
(2025)
Room-temperature in-plane ferromagnetism in Co-substituted Fe 5 GeTe 2 investigated by magnetic x-ray spectroscopy and microscopy
in 2D Materials
Högen M
(2023)
Imaging Nucleation and Propagation of Pinned Domains in Few-Layer Fe5-xGeTe2.
in ACS nano
| Description | BESSY - Laser-induced processes |
| Organisation | Helmholtz Association of German Research Centres |
| Department | Helmholtz-Zentrum Berlin for Materials and Energy |
| Country | Germany |
| Sector | Academic/University |
| PI Contribution | We exfoliated atomically thin Fe5GeTe2, a van der Waals crystal with non-trivial magnetic properties, and also succeeded in transporting them to Berlin. |
| Collaborator Contribution | We jointly characterized heterostructures of Fe3GeTe2 and a-In2Se3 with XMCD-PEEM at UE49-PGM. Real-space imaging showed a strain-mediated coupling between the ferromagnetic domains in Fe3GeTe2 and ferroelectric domains in a-In2Se3. Time-resolved measurements of laser-assisted processes in 2D materials were carried out. |
| Impact | R. Fujita, et al. Strain-Modulated Ferromagnetism at an Intrinsic van der Waals Heterojunction. Adv. Funct. Mater. 34, 36 (2024). |
| Start Year | 2023 |
| Description | Cambridge NV |
| Organisation | University of Cambridge |
| Department | Department of Physics |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | We exfoliated atomically thin Fe5GeTe2, a van der Waals crystal with non-trivial magnetic properties, and also succeeded in transporting them to Prof. Mete Atatüre's group in Cambridge. |
| Collaborator Contribution | Nitrogen vacancy scanning magnetometry revealed extrinsic contributions, including defectinduced pinning, to the ferromagnetic coercivity. |
| Impact | M. Högen, et al. Imaging Nucleation and Propagation of Pinned Domains in Few-Layer Fe5-xGeTe2. ACS Nano, 17, 17 (2023) |
| Start Year | 2023 |
| Description | MOKE at Exeter |
| Organisation | University of Exeter |
| Department | School of Physics |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | We exfoliated atomically thin Fe5GeTe2, a van der Waals crystal with non-trivial magnetic properties, and also succeeded in transporting them to Exeter. |
| Collaborator Contribution | Temperature and field-dependent MOKE measurements as a function of monolayer thickness. |
| Impact | No tangible output yet. |
| Start Year | 2024 |
| Description | Oak Ridge |
| Organisation | Oak Ridge National Laboratory |
| Country | United States |
| Sector | Public |
| PI Contribution | We characterized atomically thin flakes and bulk crystals of Co-doped Fe5GeTe2 with X-ray magnetic circular dichroism (XMCD) at ALBA Synchrotron. XMCD-PEEM was conducted at BL24, and XMCD spectroscopy was conducted at BL29. • XMCD spectroscopy revealed significant spin polarization at the Te ligand, revealing itinerant ferromagnetism [2]. |
| Collaborator Contribution | Provision of samples. Provision of cleanroom and PPMS time. |
| Impact | E. Heppell, et al. Room-temperature in-plane ferromagnetism in Co-substituted Fe5GeTe2 investigated by magnetic x-ray spectroscopy and microscopy. 2D Mater. 12, 2 (2025). |
| Start Year | 2024 |