Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 114: Oxides: Bulk, films and interfaces

HL 114.8: Vortrag

Freitag, 4. April 2014, 11:30–11:45, POT 251

Structure dependent magnetic properties of Co implanted TiO2 — •Oguz Yildirim1,2, Steffen Cornelius1, Maik Butterling3, Wolfgang Amwand3, Andreas Wagner3, Alevtina Smekhova4, and Kay Potzger11Institute for Ion Beam Physics and Materials Research, HZDR, Dresden, Germany — 2Institute for Physics of Solids, TU Dresden, Zellescher Weg 16, 01069 Dresden, Germany — 3Institute for Radiation Physics , HZDR, Dresden, Germany — 4Lomonosov Moscow State University, MSU, Faculty of Physics, Moscow, Russia

Magnetic and structural properties of amorphous and anatase TiO2 thin films implanted with Co ions have been investigated. Implantation induced defects have been characterized using positron annihilation spectroscopy (PAS) while for magnetic chracterization we have used magnetometry. Up to a doping level of 2.5 at.%, only a paramagnetic contribution has been detected. The susceptibility strength , however, depends on the structure of the unimplanted film. Results on the formation of secondary phases at higher doping level will also be presented.

This work is supported by the Initiative and Networking Fund of the German Helmholtz Association, Helmholtz-Russia Joint Research Group HRJRG-314, and the Russian Foundation for Basic Research, RFBR 12-02-91321-SIG, Start: 01.02.2012

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