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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 Hung^1,2, Do Hung Manh³, Steffen Schulze¹, Vo Vong³, and Michael Hietschold¹ — ¹Solid 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 AA′BB′O₃ (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.