Magnetic Anisotropy in Thin Layers of (Mn,Zn)Fe2O4 on SrTiO3 (001) (Reinhard Denecke, Martin Welke, Paula Huth, Joachim Graefe, Kerstin Brachwitz, Michael Lorenz, Marius Grundmann, Michael Ziese, Pablo David Esquinazi, Eberhard Goering, Gisela Schuetz, Karl-Michael Schindler, Angelika Chassé)