Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.12: Poster

Freitag, 4. April 2014, 10:30–13:30, P2

Co thickness and temperature dependent anomalous Nernst and Hall effect in Co/Pd multilayers — •Tristan Matalla-Wagner, Vedat Keskin, Daniel Meier, Jan-Michael Schmalhorst, Timo Kuschel, and Günter Reiss — Thin Films and Physics of Nanostructures, Bielefeld University, Germany

The anomalous Hall effect (AHE) describes a charge voltage generated by spin-orbit-scattering of electrons in solid states. This voltage depends on the applied electric current and on the magnetization in the investigated material. Due to the dependence on the magnetization the voltage describes a magnetization curve which is antisymmetric with respect to the external magnetic field. The same antisymmetric shape of the magnetization curve can be obtained for the anomalous Nernst effect (ANE). Here, the driving force is a temperature gradient instead of an electric current. Therefore, the conclusion could be, that the ANE is a thermally generated AHE.

In Co/Pd multilayers the AHE depends on the Co thickness and temperature [1]. In this work, the impact of varying these parameters on the AHE as well as ANE is studied. The different behavior of AHE and ANE is discussed in context of spin Seebeck effect investigations.

[1] Keskin et al., Appl. Phys. Lett. 102, 022416 (2013)