Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 48: Oxide and Insulator Surfaces: Structure, Epitaxy and Growth
O 48.1: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
Epitaxy of Fe3O4/CoO bilayers and formation of cobalt ferrite on SrTiO3(001) — •Jannis Thien, Jari Rodewald, Martin Hoppe, Karsten Küpper, and Joachim Wollschläger — Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany
Thermoelectric generation using magnetic insulators such as ferrites has recently turned into a field of interest. In these materials the thermoelectric generation is initiated by a heat-mediated pure-spin-current, called the spin-Seebeck effect [1]. Furthermore, ferrites are of large interest for spin filters due their spin-dependent band gap [2].
One approach of preparing the ferrite CoFe2O4 is the interdiffusion of Fe3O4/CoO bilayers. Hence, Fe3O4/CoO bilayers were grown by reactive molecular beam epitaxy (RMBE) on SrTiO3(001) consecutively. Afterwards the samples were post-annealed to start the diffusion process. The structural characterization of the surface was realised by low energy electron diffraction (LEED). X-ray photoelectron spectroscopy (XPS) was used to examine the chemical composition. Additionally, hard x-ray photoelectron spectroscopy (HAXPES) was carried out to be more sensitive to the bulk and interface composition. Further investigations of magnetic properties by vibrating sample magnetometry (VSM) are going to be performed.
[1] T. Niizeki et al., AIP Advances 5, 053603 (2015)
[2] J.-B. Moussy, J. Phys. D: Appl. Phys. 46, 143001 (2013)