Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 42: Joint Session "Novel Spincaloritronic Devices: Control of Heat, Charge and Momentum Flow" (jointly with TT), Organization: Markus Münzenberg (Univ. Göttingen), Mathias Weiler (WMI Garching)

MA 42.1: Hauptvortrag

Donnerstag, 29. März 2012, 15:00–15:30, EB 301

Spin Seebeck and spin Peltier effects in ferromagnetic-nonmagnetic devices — •Bart van Wees — Zernike Institute of Advanced Materials, Groningen, The Netherlands

I will give an overview of two spincaloritronic effects in ferromagnet-nonmagnetic devices. First, the spin (dependent) Seebeck effect is demonstrated by the injection of a spin current into a non-magnetic metal, using a temperature gradient and an associated heatcurrent [1]. The second example is the recent observation of the spin Peltier effect [2]. In a specially designed device it is shown that a cooling or heating is associated with a spin current which flows in a specially designed permalloy/copper/permalloy structure. The cooling/heating due to the spin Peltier effect is detected as a change in temperature by an on-chip nanoscale thermocouple. Implications for further research will be discussed.

[1]A. Slachter, F. L. Bakker, J.-P. Adam, and B. J. van Wees, "Thermally driven spin injection from a ferromagnet into a non-magnetic metal", Nature Physics 6, 879-882(2010) [2]J. Flipse, F.L. bakker, A. Slachter, F.K. Dejene and B.J. van Wees, "Cooling and heating with electron spins: Observation of the spin Peltier effect", arXiv:1109.6898, subm. to Nature Nanotechnology