Berlin 2018 – wissenschaftliches Programm

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SYVC: Symposium Voltage Control of Functional Interfaces: Magneto-ionic Meet Memristive Systems

SYVC 1: SYVC: Voltage Control of Functional Interfaces – Magneto-ionic Meet Memristive Systems

SYVC 1.2: Hauptvortrag

Mittwoch, 14. März 2018, 15:30–16:00, H 0105

Ionic Control of Materials Beyond Interfaces — •Dustin Gilbert — National Institute of Standards and Technology, Gaithersburg, MD 20899, USA

Designing ionic distributions in materials is one of the most promising approaches for future nanotechnology devices, enabling control of virtually every property of that material, ranging from electrical and thermal resistivity to superconductivity, or even optical, mechanical, and magnetic properties. Control of (quasi-)bulk ionic distributions is of particular interest to us, as some material properties are most useful, or even require, lengthscales larger than what is typically considered interfacial. In this talk, I will present our works controlling ionic distributions and consequentially material properties within metal(-oxide) thin films. First I will discuss our recent investigations into control of magnetism, resistivity, structure and superconductivity in magnetic heterostructures and perovskites (La,Sr)(Co,Mn)O3, and YBa2Cu3O7. We use a solid-state redox approach to leach oxygen from our films, thus continuously controlling our materials. I will show that perovskites present particular promise for ionic technologies due to their high ion mobility and sensitivity to chemical stoichiometry. In the second part of the talk I will discuss our work designing magnetism in Co thin-films with electric fields. Our work demonstrates critical limits and identifies details crucial to control of magnetism in metallic systems particularly in the quasi-bulk lengthscale. These works show that control of ionic distributions is achievable even beyond the interface and this presents fantastic opportunities for next generation technologies.

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DPG-Physik > DPG-Verhandlungen > 2018 > Berlin