Zeitschriftenartikel:
R. Turtelli, M. Atif, J. Krippel, R. Grössinger, F. Kubel, W. Linert:
"Superparamagnetic CoFe2O4 prepared by modified oxalate method";
International Journal of Materials Research,
9
(2012),
S. 1163
- 1165.
Kurzfassung englisch:
The modified oxalate precursor method was used for the preparation of nanocrystalline CoFe2O4. Structural in"vestigations of as-produced powders performed by means of high-resolution transmission electron microscopy and X-ray diffraction revealed an average particle size of 8nm. The nanocrystallites are pure CoFe2O4and present a well crystallized spinel structure with lattice constant of 8.3583 Å. The particles are superparamagnetic exhibiting a blocking temperature around room temperature. The magnetization and the coercive field values obtained at 9T are 56.8emu∙g-1and 17.0 kOe (at 4.2K), respectively. The crystalline anisotropy determined from the coercive field as a function of temperature is 8.0×105J∙m-3, which is much higher than that of bulk materials.
Schlagworte:
- Magnetic nanoparticles - Cobalt ferrite - Superparamagnetism - High anisotropy - Oxalate method
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.3139/146.110791
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.