Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.55: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Structural and magnetic properties of ultrathin epitaxial Fe3O4/NiO bilayers and Fe3O4 films grown on SrTiO3(001) — •Olga Schuckmann1, Tobias Schemme1, Nico Pathé1, Frederic Timmer1, Ralph Bus1, Timo Kuschel2, Karsten Kuepper1, and Joachim Wollschläger1 — 1Physics Department, Osnabrück University, Germany — 2CSMD, Physics Department, Bielefeld University, Germany
The understanding of magnetic interactions between a ferrimagnet and an antiferromagnet has become of considerable interest for various of applications in information storage technology, e.g., magnetoresistive (MR) devices. In this study, the influence of an NiO interlayer on magnetic and structural properties of ultrathin Fe3O4 films was investigated. Epitaxial Fe3O4/NiO bilayers and Fe3O4 films were grown on niobium doped SrTiO3(001) substrates by reactive molecular beam epitaxy. The stoichiometry and surface structure of the oxide films were controlled in-situ by x-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED), respectively. The film structure was characterized ex-situ by x-ray diffraction (XRD) using a photon energy of 10keV. In addition, the magnetic behavior of the magnetite films was studied by magnetooptic Kerr effect (MOKE) showing that the thickness and epitaxial strain affect the magnetic anisotropy of the films.