Tunable ferromagnetic 2D electron gases at the oxide interface: LaTiO<sub>3</sub>/EuTiO<sub>3</sub>
ORAL
Abstract
Two-dimensional electron gases (2DEGs) with emergent ferromagnetism attracts lots of attention because of the added spin-degree of freedom and their potential for functional applications. Here, we investigate the ferromagnetic 2DEGs formed at the heterostructure of a polar-antiferromagnetic LaTiO3 on a non-polar antiferromagnetic oxide EuTiO3. These heterostructures show robust ferromagnetism in magneto-transport measurements. We discuss the possible mechanisms of the emergent magnetic orderings. Anomalous Hall effects with hump-like behavior are also observed in particular samples, sensitive to the exact growth conditions. The magnetism in this system is highly tunable. Our results may lead to a new route to controlling emergent magnetic properties at the oxide interfaces and broadening their applications as functional magnetic devices.
*This research was undertaken thanks, in part, to funding from the Max Planck-UBC-UTokyo Center for Quantum Materials and the Canada First Research Excellence Fund, Quantum Materials and Future Technologies Program. Part of the experiments was performed at the Surface Science Facility of the REIXS beamline in the Canadian Light Source, which is funded by the Canada Foundation for Innovation, Natural Sciences and Engineering Research Council of Canada (NSERC), the National Research Council of Canada, the Canadian Institutes of Health Research, the Government of Saskatchewan, Western Economic Diversification Canada, and the University of Saskatchewan.
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Presenters
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Hyungki Shin
- University of British Columbia