Berlin 2005 – wissenschaftliches Programm

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MA: Magnetismus

MA 20: Poster:Schichten(1-29),Spintrsp(30-45),Ex-Bias(46-63),Spindyn(64-75),Mikromat.(76-80),Cluster(81-94),Abbv.(95-99),Obflm(100-02),SpElek.(103-09),E-Theo(110-14),Mikromag.(115-16),Spin+PÜ(117-26),Mag.Mat.(127-51),Meth.(152-55),Mol.Mag(156-59),Kondo(160-65

MA 20.1: Poster

Montag, 7. März 2005, 14:00–18:00, Poster TU C

Pulsed laser deposition of electron-doped La_1−xCe_xCoO₃ thin films — •Dirk Fuchs¹, Peter Adelmann¹, Peter Schweiss¹, Thorsten Schwarz^1,2, and Rudolf Schneider¹ — ¹Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany — ²Universität Karlsruhe, Fakultät für Physik, D-76128 Karlsruhe, Germany

The electron doping of LaCoO₃ perovskites with the substitution of trivalent La³⁺ by tetravalent Ce⁴⁺ ions is usually strongly limited by the small solubility of Ce under standard conditions. With thin film preparation we succeeded in the growth of highly cerium-doped thin films. La_1−xCe_xCoO₃ (LCCO) thin films, with 0.1≤ x ≤ 0.5 , were deposited by laser ablation using a KrF excimer laser. The deposition was carried out from polycrystalline LCCO targets prepared by the sol-gel route and standard solid state reaction. The film growth was studied as a function of the substrate temperature and material, laser energy and oxygen partial pressure. The films were optimised with respect to crystalline quality. The magnetic and electric properties of the samples were characterized by magnetization and resistivity measurements.