Dresden 2006 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.7: Poster

Tuesday, March 28, 2006, 15:15–19:15, P1

In-situ RHEED-Characterization of La_2/3Ca_1/3MnO₃ thin films — •Alexander Hirsch, Ralf Koppert, Frank Ludwig, and Meinhard Schilling — TU-Braunschweig, Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik,Hans-Sommer-Straße 66, D-38106 Braunschweig, Germany

The growth of doped perovskite manganites is interesting for both basic research and potential applications. These materials show a huge change in electric resistivity caused by an external magnetic field, the colossal magnetoresistance (CMR) effect. The strain induced by lattice mismatch between the substrate and the thin films influences the electric and magnetic properties of the manganite films.

La_2/3Ca_1/3MnO₃ thin films are grown on SrTiO₃ (001) substrates using pulsed laser deposition (PLD). The epitaxial growth of the films is investigated by in-situ reflection high energy electron diffraction (RHEED) supplemented by x-ray diffraction and atomic force microscopy. In particular the change of the lattice constant during the first monolayers is monitored by in-situ RHEED. Besides the dependence of the PLD parameters on the intervall deposition is analyzed. To obtain maximum information on the growth conditions the experiments are planned by means of statistical design of experiments (DOE).