Regensburg 2016 – scientific programme

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.54: Poster

Tuesday, March 8, 2016, 09:30–12:30, Poster B1

Effect of microstructure on the magnetic properties of transition metal implanted TiO2 films — •Oguz Yildirim¹, Steffen Cornelius^1,2, Maik Butterling¹, Wolfgang Anwand¹, Andreas Wagner¹, Alevtina Smekhova^3,4, René Hübner¹, Roman Böttger¹, Jan Fiedler¹, Carsten Bähtz⁵, and Kay Potzger¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany — ²Delft University of Technology, Department of Chemical Engineering, Materials for Energy Conversion and Storage, Delft, The Netherlands — ³Lomonosov Moscow State University (MSU) Moscow, Russia — ⁴University of Duisburg-Essen, Faculty of Physics and CENIDE Duisburg,Germany — ⁵Rossendorf Beamline, European Synchrotron Radiation Facility Grenoble, France

The origin of the ferromagnetic order in TM:TiO2 (TM: transition metal) systems is studied by investigating the interplay between structural order, defects and incorporation of implanted TM ions within the host lattice. The defect properties of the host TiO2 films are altered by preparing different microstructures of TiO2 (e.g. amorphous, polycrystalline anatase and epitaxial anatase). The difference in microstructure is also found to influence the incorporation of the implanted ions into the host lattice. The crystallographic incorporation of the implanted TM atom is found only in crystalline films. Moreover, it is observed that the suppression of the dopant related secondary phases can also be achieved by changing the microstructure. Based on this discussion we propose an ideal microstructural candidate for a dilute magnetic oxide material based on our results.