Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.45: Poster

Freitag, 18. März 2011, 11:00–14:00, P2

Defect-induced ferromagnetism in crystalline SrTiO3 — •Julia Osten¹, Kay Potzger¹, Alexander. A. Levin², Artem Shalimov¹, Georg Talut¹, Helfried Reuther¹, Seda Arpaci¹, Danilo Bürger¹, Heidemarie Schmidt¹, Tina Nestler³, and Dirk C. Meyer³ — ¹Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany — ²Institut für Strukturphysik, Technische Universität Dresden, 01062 Germany — ³Institut für Experimentelle Physik, Technische Universität Bergakademie Freiberg, 09596 Freiberg

Ion irradiation of high-quality SrTiO3 single crystals leads to room-temperature ferromagnetism. Structural analysis revealed oxygen deficient (polycrystalline) SrTiO3, Sr2Ti6O13, or Ruddlesden-Popper like secondary phases at the sample surface induced by the irradiation. The lack of potentially ferromagnetic secondary phases suggests defects to be the origin of the observed ferromagnetic signal.