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DS: Fachverband Dünne Schichten

DS 7: Thermoelectric and Phase Change Materials

DS 7.1: Vortrag

Dienstag, 10. März 2026, 10:00–10:15, REC/B214

Voltage-Controlled Magnetism via Electrically Triggered Metal-Insulator Transitions — •Lorenzo Fratino — Laboratoire de Physique Théorique et Modélisation, CY Cergy Paris Université

Phase separation is key to understanding magnetism in correlated systems like manganites. This talk will show how the resistive switching in metal-insulator transition (MIT) materials can be used to create and control artificial phase separation with voltage. In (La,Sr)MnO*, a threshold voltage triggers an electrothermal MIT, creating a paramagnetic insulating barrier inside a ferromagnetic metallic matrix [1]. We can use this to directly tune magnetic properties, achieving effects like voltage-triggered magnetic anisotropy switching [2]. We also developed a CdS/LSMO heterostructure where light injection modulates resistance drop*comparable to a 9 T magnetic field, while surprisingly decoupling the optical and magnetic responses [3]. This work establishes a versatile pathway for voltage-controlled magnetism using MIT materials [4].

References: [1] Nat. Commun. 12, 5499 (2021) [2] Phys. Rev. B 108, 174434 (2023) [3] Phys. Rev. Appl. 19, 044077 (2023) [4] Adv. Funct. Mater. 2419840 (2025)

Keywords: LSMO; Mottronics; Strongly correlated materials; Neuromorphic materials; Artificial Intelligence