title: Longitudinal spin Seebeck effect contribution in transverse spin Seebeck effect experiments in Pt/YIG and Pt/NFO.
abstract: The spin Seebeck effect, the generation of a spin current by a temperature gradient, has attracted great attention, but the interplay over a millimetre range along a thin ferromagnetic film as well as unintended side effects which hinder an unambiguous detection have evoked controversial discussions. Here, we investigate the inverse spin Hall voltage of a 10 nm thin Pt strip deposited on the magnetic insulators Y3Fe5O12 and NiFe2O4 with a temperature gradient in the film plane. We show characteristics typical of the spin Seebeck effect, although we do not observe the most striking features of the transverse spin Seebeck effect. Instead, we attribute the observed voltages to the longitudinal spin Seebeck effect generated by a contact tip induced parasitic out-of-plane temperature gradient, which depends on material, diameter and temperature of the tip.
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Meier
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Reinhardt
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: van Straaten
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Klewe
authors.affiliation: Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, 85748 Garching, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Althammer
authors.affiliation: Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, 85748 Garching, Germany.|Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Schreier
authors.affiliation: Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, 85748 Garching, Germany.|Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799 München, Germany.
authors.forename: Sebastian T B
authors.initials: STB
authors.lastname: Goennenwein
authors.affiliation: Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama 35487, USA.
authors.forename: Arunava
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany.
authors.forename: Maximilian
authors.initials: M
authors.lastname: Schmid
authors.affiliation: Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany.
authors.forename: Christian H
authors.initials: CH
authors.lastname: Back
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Jan-Michael
authors.initials: JM
authors.lastname: Schmalhorst
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Timo
authors.initials: T
authors.lastname: Kuschel
authors.affiliation: Department of Physics, Center for Spinelectronic Materials and Devices, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
authors.forename: Günter
authors.identifier: http://orcid.org/0000-0002-0918-5940
authors.initials: G
authors.lastname: Reiss