Size and crystallinity-dependent magnetic properties of CoFe2O4 nanocrystals
| Autor: | S. C. Goh, Sh Ahmadi, Maisarah Yusoff, Nay Ming Huang, Sarani Zakaria, Hong Ngee Lim, Chin Hua Chia, Choon Yian Haw |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Coprecipitation Process Chemistry and Technology Mineralogy Coercivity Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Crystallinity Linear relationship Nanocrystal Chemical engineering law Materials Chemistry Ceramics and Composites Calcination Crystallite |
| Zdroj: | Ceramics International. 36:605-609 |
| ISSN: | 0272-8842 |
| Popis: | CoFe2O4 nanocrystals were synthesized by a wet chemical coprecipitation approach. In order to investigate the effect of degree of crystallinity and mean crystallite size of CoFe2O4 nanocrystals on the magnetic properties, a series of CoFe2O4 samples with different degree of crystallinity and mean crystallite size were produced by varying the synthesis and subsequent calcination temperatures. The higher synthesis and subsequent calcination temperatures have resulted in greater degree of crystallinity and bigger mean crystallite size of CoFe2O4 nanocrystals. The VSM studies showed that the saturation magnetization (M-s) and coercivity (H-c) of the CoFe2O4 nanocrystals possessed a linear relationship with the mean crystallite size. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect