Abstract
MgFe2O4 nanoparticles have been synthesized by coprecipitation method. Magnetic measurements in combination with neutron diffraction have determined the existence of a superparamagnetic state in this metal oxide system. The superparamagnetic relaxation of magnetization in these nanoparticles has been studied by using Mossbauer spectroscopy. The relaxation time has been correlated with the particle size and temperature and is consistent with Neel theory.
| Original language | English |
|---|---|
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 194 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 1999 |
| Event | Proceedings of 1998 2nd International Conference on Scientific and Clinical Applications of Magnetic Carriers - Cleveland, OH, USA Duration: May 28 1998 → May 30 1998 |
Funding
We thank Professor Angus Wilkinson of Georgia Tech for his help during the data analysis of neutron diffraction. The financial support from Georgia Tech to this research is acknowledged. AJR is supported in part by a William Henry Emerson Chemistry Fellowship. The neutron diffraction studies were carried out at Oak Ridge National Laboratory, which is managed by Lockheed Martin Energy Research Corp. for the US Department of Energy under contract number DE-AC0596OR22464.