[Zurück]

V. Giap, R. Sato Turtelli, W. Nunes, E. Schafler, N. Hanh, R. Grössinger, M. Knobel:
"Ultrafine Co_1-xZn_xFe₂O₄ particles synthesized by hydrolysis: Effect of thermal treatment and its relationship with magnetic properties";
Journal of Non-Crystalline Solids, 353 (2007), S. 805 - 807.

Ultrafine Co_1−xZn_xFe₂O₄ particles synthesized by hydrolysis: Effect of thermal treatment and its relationship with magnetic properties

Giap V. Duong a, b, R. Sato Turtelli a,W.C. Nunes c, E. Schafler d, N. Hanh b, R. Grössinger a and M. Knobel c

a Instut für Festkörperphysik, Technische Universität Wien, Wiedner Hauptstrasse 8-10, A-1040, Wien, Austria
b Faculty of Chemical Engineering, Hanoi University of Technology, 1 Dai Co Viet, Hanoi, Viet Nam
c Instituto de Física `Gleb Wataghin´ - Unversidade Estadual de Campinas, CP 6165, Campinas (SP), Brazil
d Department of Materials Physics, Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090, Vienna, Austria

Abstract

Co_1−xZn_xFe₂O₄ (x = 0, 0.2 and 0.4) fine powders with particles size of 3 nm were prepared by hydrolysis method. The powders were annealed at 500 °C for 3 h. With heat treatment, the average particles size increased to 12 nm with corresponding increase in blocking temperature, saturation magnetization and reduced remanence. A significant increase in coercive field was found only for the pure CoFe₂O₄.

Nanoparticles, colloids and quantum structures; Nanoparticles

http://dx.doi.org/10.1016/j.jnoncrysol.2006.12.045

http://dx.doi.org/10.1016/j.jnoncrysol.2006.12.045