Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.5: Poster
Thursday, March 19, 2020, 15:00–18:00, P3
Charge and spin transport in NiFe2O4 thin films with varying lattice parameters — •Oliver Ritter, Jan Biedinger, Karsten Rott, and Timo Kuschel — Center for Spineletronic Materials and Devices, Bielefeld University, Germany
Nickel ferrite (NFO) as a ferrimagnetic insulator is a promising material for spin caloric applications [1]. In this work, twin samples of 45 nm NFO thin films have been prepared by sputter deposition on MgAl2O4 substrates and in-situ post annealed at different temperatures, thus modifying the lattice parameters of NFO. Subsequently, only one of each sample pair has been capped by 3 nm Pt for spin Seebeck effect studies. After standard structural and magnetic characterization of the samples, the electrical resistivity has been measured to identify the oxygen content [2,3]. The influence of the lattice parameters on thermally induced spin current transport has not been investigated so far, but will be discussed within this contribution.
[1] D. Meier et al., Phys. Rev. B 87, 054421 (2013)
[2] P. Bougiatioti, et al., Phys. Rev. Lett. 119, 227205 (2017)
[3] P. Bougiatioti, et al., J. App. Phys. 122, 225101 (2017)