Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 8: Focus Session: Magnetic structurally and compositionally modulated nanowires and nanotubes

MA 8.8: Vortrag

Montag, 12. März 2018, 18:15–18:30, H 1012

Magnetism and Transport in Hybrid Magnetic Nanowires — •Roman Hartmann, Sergej Andreev, and Torsten Pietsch — Fachbereich Physik, Universität Konstanz, 78464 Konstanz, Germany

Spin-based electronics present an alternative to conventional electronic devices. For example, spin-transfer nano-devices offer higher switching speeds and greatly reduced dissipative loss but often require large operation currents and are difficult to manufacture.
Herein we present a simple but versatile concept to fabricate complex magnetic nanowire devices in a single processing step via electrodeposition into a self-organized anodic aluminum (AAO) template. We demonstrate the fabrication of heteronanowires composed of magnetic multilayers of different ferro- and paramagnetic metals and alloys (e.g. Ni, Cu, NiCu) with diameters around 30 nm, which greatly reduces the drive current. Device integration is done using lithographic methods. The static and dynamic magnetic properties are analysed via SQUID magnetometry, FMR and electron transport spectroscopy. Due to their intrinsic multilayer geometry and large number of parallel wires, these structures can be employed in magnetic nano-oscillators for microwave generation and detection with optimized output power and sensitivity respectively.