Regensburg 2025 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 7: Spins in Molecular Systems: Strategies and Effects of Hyperpolarization

DS 7.1: Hauptvortrag

Mittwoch, 19. März 2025, 09:30–10:00, H14

Enhancing Organic Spin Valves Through Spinterface Engineering — •Shuaishuai Ding and Wenping Hu — Institute of Molecular Aggregation Science, School of Science, Tianjin University, Tianjin, China

Organic spin valves hold immense promise for efficient spintronic devices, driving advancements in information processing and storage technologies. The spinterface, the interface between an organic semiconductor and a ferromagnetic electrode, plays a crucial role in the performance of these devices. However, the inherent instability of the spinterface poses challenges that must be addressed to fully realize this potential. To tackle these issues, we have developed a comprehensive approach that combines innovative fabrication techniques and material engineering. Electrode transfer technology enhances interfacial properties by enabling the precise deposition of high-quality ferromagnetic electrodes onto organic semiconductors, while doping with F4-TCNQ effectively improves spin injection efficiency through modulation of electronic and magnetic characteristics. Moreover, the engineering of controllable bottom spinterfaces allows for precise regulation of spin injection, resulting in highly tunable device performance. By leveraging the spinterface, we have achieved in-situ control of device tunability, significantly expanding the multilevel resistance modulation of organic spin valves. These advancements not only address key challenges of unstable spinterface but also establish novel methods for device modulation, marking an important leap forward in organic spintronics.

Keywords: organic spintronics; organic spin valve; spinterface