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AGjDPG: Arbeitsgruppe junge DPG

AGjDPG 6: PhD Student Symposium: Spintronics on the Way to modern Storage Technology I

AGjDPG 6.1: Topical Talk

Donnerstag, 29. März 2012, 10:00–10:30, BH 243

Magnon Spintronics — •Burkard Hillebrands, Andrii Chumak, Alexandr Serga, and Benjamin Jungfleisch — Fachbereich Physik and Forschungszentrum OPTIMAS, TU Kaiserslautern

Spintronics is concerned with the development of devices which exceed the performance and energy efficiency of charge-based electronics by exploiting the electron's spin degree of freedom. Spin angular momentum, which is the information carrier in spintronics, can be transferred not only by the flow of electrons, but also by magnons: the quanta of spin waves (collective excitations of the spin lattice of a magnetic material). This opens a new research direction: magnon spintronics, a sub-field of spintronics in which information is transferred and processed using magnons. It can be implemented in an electric-isolator environment (yttrium iron garnet, YIG) fully avoiding Ohmic losses. I will give a tutorial style introduction into the main construction blocks of a magnon spintronics device: converters between information carried by the spin and the charge of electrons and magnons, magnon conduits, and physical phenomena allowing information processing by magnons. The most promising convertors for magnon spintronics are based on the spin pumping effect (which transforms spin waves into pure spin currents) and the inverse spin Hall effect (which converts spin currents into charge currents). I will present some selected results addressing magnetic insulator YIG - nonmagnetic Pt structures.