J. Phys. IV France 11 (2001) Pr11-3-Pr11-8
Perovskite heterostructures grown by MOCVDO.Yu. Gorbenko1, I.E. Graboy1, A.R. Kaul1, G. Wahl2 and V.L. Svetchnikov3
1 Chemistry Department, Lomonosov Moscow State University, 119899 Moscow, Russia
2 IOPW, TU Braunschweig, Bienroder Weg 53, 38108 Braunschweig, Germany
3 National Centre for HREM, Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
We have deposited epitaxial perovskite heterostructures including nickelates RNiO3 (R=Pr, Nd) on the top of CMR manganites (La1-xPrx)0.7Ca0.3MnO3, (x=0-1) and antiferromagnetic ferrites RFeO3 (R=Nd, Eu). The heterostructures were characterised by XRD, SEM, EDX, HREM, electric and magnetic measurements. Particular attention is paid to the lattice strain in the layers and the structure of their interfaces. A 60 K shift of the metalinsulator transition temperature as well as suppression of the electrical resistivity hysteresis were found for the nickelate film on the ferrite layer. The effects are believed to be due to the strain and magnetic coupling of the layers.
© EDP Sciences 2001