Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.23: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-EG
A systematical study on the anomalous Hall and Nernst effect in Co/Pd multilayers — •Oliver Reimer1, Daniel Meier1, Jan-Michael Schmalhorst1, Guenter Reiss1, and Timo Kuschel1,2 — 1CSMD, Physics Department, Bielefeld University, Germany — 2University of Groningen, The Netherlands
In spin caloric experiments the unambigous determination of the
longitudinal spin Seebeck effect (LSSE) produced by metallic magnetic films or multilayers is challenging due to the simultaneously occuring anomalous Nernst
effect (ANE). Thus a new methodology that can eliminate parasitic effects like
the ANE is necessary. Studies of the anomalous Hall effect (AHE), i.e. the charge current based counterpart of the ANE
in perpendicular magnetized Co/Pd multilayers revealed a sign change of the
AHE [1,2]. The sign of the AHE change depends in particular on the temperature and the Co thickness of
the multilayer. We present a systematic study on Co/Pd multilayers, which compares the AHE and the ANE for samples with varying
Co thickness and base temperature within one experiment. If a sign change in the ANE could be detected, LSSE experiments could
be tuned in a way that no ANE contributions would occur. This opens a way for unambiguously detecting the LSSE and for deepening the knowledge
of spin-related transport phenomena.
[1] V. Keskin et al., Appl. Phys. Lett. 102, 022416 (2013)
[2] X. Kou et al., J. Appl. Phys. 112, 093915 (2012)