Department of Physics

Indian Institute Of Technology Madras , Chennai

Spin Currrents in Magnetic Heterostructures

Speaker : Prof. Rudolf Gross, Walther-Meißner-Institut and Technische Universität München, Germany

2015-05-11

Abstract :

The generation and detection of pure spin currents in magnetic heterostructures – i.e., the directed flow of spin angular momentum – has developed into a fascinating research field and may find useful appplications. In ferromagnet/normal metal thin film bilayers, pure spin currents can be generated by means of a nonequilibrium situation induced, e.g., by spin pumping, or via the application of thermal gradients in the so-called spin Seebeck effect. An elegant scheme for detecting spin currents is based on the inverse spin Hall effect: because of spin-orbit coupling, a spin current also induces a charge current, which then can be detected using conventional electronics.

I will discuss our recent experimental investigations of spin current-related phenomena in ferromagnet/normal metal thin film devices. Our results show that spin current generation is possible from both electrically conductive as well as electrically insulating ferromagnets (so-called ferromagnetic insulators). In particular, I will address spin Seebeck and spin Nernst effect experiments in magnetic insulator/normal metal heterostructures. Moreover, I will discuss a novel magneto-resistance effect arising from the interplay between spin and charge currents.

ABOUT THE SPEAKER:

Prof. Rudolf Gross is an experimental condensed matter physicist. His research interests include QIP, high Tc superconductors, thin films and spin-related phenomena. Prof. Gross completed his postgraduate education and habilitation from the University of Tübingen. He has worked in Japan, the US and at the University of Cologne before joining the Technical University of Munich in 2000, where he is current the Chair for Technical Physics and Director of the Walther-Meißner-Institute for Low Temperature Research of the Bavarian Academy of Sciences and Humanities. He has over 350 scientific publications. He has been honoured with several awards of which the Silberne Verdienstmedaile of the Bavarian Academy of Sciences and Humanities and the Leibniz Medal of IFW Dresden are the most recent.​

Key Speaker Prof. Rudolf Gross, Walther-Meißner-Institut and Technische Universität München, Germany
Guests None
Place S N Bose Hall (HSB 210)
Start Time 5:00 PM
Finish Time 6:00 PM
External Link None