DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.46: Poster

Tuesday, March 13, 2018, 18:15–20:15, Poster B

Electrical conductivity measurements of ultrathin ferrite films on MgO(001) — •Tobias Pollenske, Jari Rodewald, Tobias Pohlmann, and Joachim Wollschläger — Fachbereich Physik, Universität Osnabrück, Barbarastr. 7, 49076 Osnabrück, Germany

The semiconducting and ferrimagnetic behavior make ultrathin epitaxial ferrite films like NiFe2O4 or CoFe2O4 promising candidates in the field of spintronics. Due to their spin dependent tunneling barrier they are well-suited to be used as spin filters. Here, the resistance of the films is a crucial property for the formation of suitable tunneling barriers and thus for the performance as a spin filter.

Hence, in this work a measurement setup is taken into operation to investigate the temperature dependent conductivity of ultrathin ferrite films. First, different types of contacts in van-der-Pauw geometry are tested in order to optimize the performance of the measurement setup. Furthermore, ultrathin NixFe3−xO4 films on MgO(001) with different stoichiometries (0 ≤ x ≤ 2) are prepared via reactive molecular beam epitaxy (RMBE) and their conductivity is analyzed with respect to the different cation ratios.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin