| Autor: |
Yuko Ichiyanagi, Toshiyuki Mashino, Hikaru Katayanagi, Shinji Kimura, Yuki Moro, Daiki Shigeoka |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Journal of Physics: Conference Series. 200:122002 |
| ISSN: |
1742-6596 |
| DOI: |
10.1088/1742-6596/200/12/122002 |
| Popis: |
Co-Ti ferrite (Co1+xTixFe2−2xO4, 0.2 ≤ x ≤ 0.5) nanoparticles with average diameters ranging from 6 to 12 nm were produced by using our novel wet chemical method. The crystal structures and magnetic properties of the obtained samples were investigated by X-ray diffraction and superconducting quantum interference device (SQUID) magnetometer measurements. DC magnetization measurements showed that the coercive force Hc and saturation magnetization Ms decreased as the composite parameter x increased. This phenomenon suggests that Ti4+ ions located on B-sites weaken the superexchange interaction between A and B sites. For x= 0.3, the value of Hc decreased drastically. The AC magnetic susceptibility of these samples was also investigated, and it was concluded that the sample with a diameter of 12 nm and composition given by x= 0.3 is the most appropriate sample for use as an agent in hyperthermia treatment. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
