Regensburg 2016 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 18: Spincaloric Transport
(Joint session of MA and TT organized by MA)

TT 18.9: Talk

Monday, March 7, 2016, 17:15–17:30, H31

Static magnetic proximity effect in Pt layers on sputter deposited NiFe₂O₄ and on Fe of various thicknesses investigated by x-ray resonant magnetic reflectivity — •Panagiota Bougiatioti¹, Christoph Klewe¹, Olga Kuschel², Joachim Wollschläger², Laurence Bouchenoire^3,4, Simon D. Brown^3,4, Jan-Michael Schmalhorst¹, Daniel Meier¹, Günter Reiss¹, and Timo Kuschel¹ — ¹CSMD, Physics Department, Bielefeld University, Germany — ²Fachbereich Physik, Universität Osnabrück, Germany — ³XMaS, ESRF, Grenoble, France — ⁴University of Liverpool, UK

In this project we implemented x-ray resonant magnetic reflectivity (XRMR) to investigate magnetic proximity effects (MPE) in Pt films on sputter deposited NiFe₂O₄(260 nm) (NFO) and in Pt/Fe(x nm) samples with x from 1.1 nm to 18.2 nm. We did not observe a magnetic response down to a limit of 0.04 µ_B per Pt atom regarding the sputter deposited NFO bilayer, in agreement to previously investigated chemical vapor deposited NFO samples [1]. We performed longitudinal spin Seebeck effect measurements on this bilayer system and exclude an anomalous Nernst effect induced by the MPE in Pt down to a certain limit. Furthermore, we confirm the independence of the MPE from the thickness of the magnetic layer (Fe), unveiling its sensitivity to the interface properties of the magnetic material [2].
[1] T. Kuschel et al., Phys. Rev. Lett. 115, 097401 (2015)
[2] T. Kuschel et al., submitted to IEEE Trans. Magn. (2015)