Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport

MA 52.17: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Magnetic properties of thin iron films on strontium titanate substrates — •Armin Haase, Kay Potzger, Oskar Maciej Liedke, and Rantej Bali — Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf

In this study, the magnetic moment of thin iron films will be investigated. The methods of preparing the strontium titanate substrate surfaces for layer growth, creating near-surface defects, and growing thin iron films will be described. A procedure for surface preparation using a sequence of etching and annealing steps in an oxygen-rich environment will be introduced. The defects were created using ion implantation, and the samples were tested for defect magnetism. A magnetic moment was determined for hydrogen with the fluency of 2×10¹⁷ 1/cm² and the energy of 1,2 keV. Nitrogen implantation did not produce defect magnetism. In a separate process, iron layers of varying thicknesses were grown and investigated for their groth modes and magnetic properties. Finally, the steps described above were combined and repeated.