Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 48: Poster Session II
MA 48.54: Poster
Donnerstag, 10. März 2016, 15:00–18:00, Poster B1
Detection of DC currents and resistance measurements in longitudinal spin Seebeck effect experiments on Pt/YIG and Pt/NFO — Daniel Meier1, •Panagiota Bougiatioti1, Timo Kuschel1, Sibylle Meyer2, Sebastian T. B. Goennenwein2, Liming Shen3, Arunava Gupta3, Jan-Michael Schmalhorst1, and Günter Reiss1 — 1CSMD, Physics Department, Bielefeld University, Germany — 2Walther-Meißner-Institut, BAdW, Germany — 3MINT Center, University of Alabama, USA
In this work we investigated thin films of the ferrimagnetic insulators Y3Fe5O12 and NiFe2O4 capped with thin Pt layers in terms of the longitudinal spin Seebeck effect (LSSE). The electric response detected in the Pt layer under an out-of-plane temperature gradient can be interpreted as a pure spin current converted into a charge current via the inverse spin Hall effect. Typically, the transverse voltage is the quantity investigated in LSSE measurements (in the range of µV). Here, we present the directly detected DC current (in the range of nA) as an alternative quantity. Furthermore, we investigate the resistance of the Pt layer in the LSSE configuration. We observe an influence of the test current on the resistance by the spin Hall magnetoresistance effect. The typical shape of the LSSE curve varies for increasing test currents.