Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 28: Spin Dynamics and Transport: Domain Walls

MA 28.7: Vortrag

Dienstag, 21. März 2017, 15:30–15:45, HSZ 401

Magnetism and Transport in Hybrid Magnetic Nanowires — •Sergej Andreev, Roman Hartmann, and Torsten Pietsch — Universität Konstanz, Deutschland

Ensembles of magnetic nanowires are the core-elements of various applications in nonvolatile memories, microwave devices and communication technologies as well as humidity- and gas sensors. Moreover, due to their small diameter in the range of few to tens of nanometers, these systems are highly interesting in magnonics and spin-(transfer) electronics, where high spin-current are required. Here we show how well-defined ensembles of hybrid, magnetic nanowires with diameters of few tens of nm, composed of multilayers of ferromagnetic Ni, NiCu, Co and other non-magnetic metals can be grown in microstructured arrays and integrated in high-frequency microwave electronic devices. The collective static and dynamic magnetic properties of the nanowire arrays are evaluated via SQUID magnetometry and FMR /EPR measurements. Additionally we will outline the potential of these devices in microwave- and THz emitters as well as spin-transfer driven magnetic oscillators.