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Berlin 2005 – scientific programme

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DF: Dielektrische Festkörper

DF 5: Dielektrische und ferroelektrische dünne Schichten und Nanostrukturen I

DF 5.8: Talk

Monday, March 7, 2005, 12:40–13:00, TU TC6

TEM and HRTEM Study Perovskite Nanoparticles Prepared by High-Energy Ball Milling — •Luu Tien Hung1,2, Do Hung Manh3, Steffen Schulze1, Vo Vong3, and Michael Hietschold11Solid Surfaces Analysis Group, Institute of Physics, Chemnitz University of Technology, Germany — 2Department of Physics, Vinh University, Vinh, Vietnam — 3Institute of Materials Science, VAST, Hanoi, Vietnam

Nanocrystalline perovskite materials are of interest for applications like catalysis and magnetoelectronics. Using a milling technique perovskites of the type AABBO3 (A = La, A′ = Sr, B = Co, Mn, B′ = Zn) have been prepared from powder raw component oxides La2O3, Co3O4, ...

XRD as well as TEM are applied for sample characterization. The material is found to consist of crystallites till to 5..15 nm size which show a strong tendency to cluster. Thermomagnetization measurements suggest that these clusters are the magnetic subunits responsible for magnetization domain formation.

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