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| Hauptseite > Publikationsdatenbank > Electrostatic Extension of Magnetic Proximity Effect in La0.7Sr0.4MnO3 |
| Hauptseite > Publikationsdatenbank > Electrostatic Extension of Magnetic Proximity Effect in La0.7Sr0.4MnO3 |
| Conference Presentation (Other) | FZJ-2025-03140 |
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2025
Abstract: Many fascinating magnetic effects emerge at interfaces between layers with different magnetic orders. Interface confinement is intimately related to the magnetic proximity effect, which typically has a spatial extent of only a few atomic layers. This short extent is due to the underlying physical coupling mechanisms, such as the exchange interaction, the Dzyaloshinsky-Moriya interaction, interface states, rehybridization, and reconstruction, all of which are highly localized. We use off-axis electron holography to reveal an exceptionally long-range magnetic proximity effect reaching ∼40 nm at a ferromagnetic (FM)/ paramagnetic (PM) interface in La0.7Sr0.3MnO3 (LSMO). This wide extent arises from carrier diffusion and drift across the interface, which changes the Mn3+/Mn4+ ratio and thereby the density of magnetic moments and local Curie temperature. We determine the carrier concentration dependence of the Curie temperature and unravel the physical mechanism of the electrostatic extension of magnetic proximity effects, fundamentally reshaping our understanding of micromagnetism inperovskites.
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