Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.55: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Spin Seebeck, proximity-induced, and ferromagnetic-induced anomalous Nernst Effect in Pt/ferromagnet bilayers — •Oliver Ritter, Tobias Peters, Jan Krieft, Panagiota Bougiatioti, and Timo Kuschel — Center for Spinelectronic Materials and Devices, Bielefeld University, Germany

The generation, manipulation and detection of spin currents has recently been extensively studied. Spincaloritronic effects such as the spin Seebeck effect (SSE) enable the generation of spin currents in ferro(i)magnetic metals (FMM) and insulators (FMI) by applying a temperature gradient. Usually normal paramagnetic metals, such as Pt on top of the ferromagnet are used to detect spin currents via the inverse spin Hall effect. Using Pt as a spin detector can cause a spin polarization of the Pt at the Pt/FMM Interface due to the magnetic proximity effect (MPE). As a result of the MPE, a proximity-induced ANE can occure. In case of studying FMMs, the ferromagnetic-induced ANE can additionally contribute to the SSE signal [1].

In this work, we investigated different Pt/FMM and Pt/FMI bilayers concerning their SSE and ANE contributions. For the FMI samples the measured signal only consists of the SSE response. In case of Pt/FMM bilayers, different ANE contributions arise as discussed in this presentation.

[1] P. Bougiatioti et al., Phys. Rev. Lett. 119, 227205 (2017)