J. Phys. IV France 09 (1999) Pr8-659-Pr8-666
Chemical composition effects in the thin films of the colossal magnetoresistive perovskite manganates grown by MOCVDO.Yu. Gorbenko1, I.E. Graboy1, A.A. Bosak1, V.A. Amelichev1, A.Yu. Ganin1, A.R. Kaul1, G. Wahl2 and H.W. Zandberben3
1 Chemistry Department, Moscow State University, 119899 Moscow, Russia
2 IOPW, TU Braunschweig, 38108 Braunschweig, Germany
3 National Center for HREM, TU Delft, Rotterdamseweg 137, AL Delft, The Netherlands
Application of the single source MOCVD techniques allows the reproducible preparation of the complex oxide solid solutions including 3-4 metal components like perovskite manganate in which a variation of the chemical composition results in drastic variation of the electrical and magnetic properties. The numerous solid solutions (La,R)l-xAxMnO3 (R = Pr, Nd, A = Ca, Sr, Na) were prepared on the single crystalline substrates (LaAlO3, SrTiO3, ZrO2(Y2O3), MgO) and characterized by X-ray diffraction and HREM. The focus was made on the lattice strain, structural imperfections and microtwinning in the films. The growth of the epitaxial heterostructures including CMR manganates and high Tc superconductors was demonstrated.
© EDP Sciences 1999