Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1803424 | Journal of Magnetism and Magnetic Materials | 2009 | 8 Pages |
Abstract
From a new magnetically diluted spinel oxide with composition Fe0.6Mg1.6Ni0.1Ti0.7O4 an as-prepared sample and one after reheating three times have been investigated with Mössbauer spectroscopy. The spectra of the as-prepared sample clearly show a typical superparamagnetic behaviour of magnetic clusters with diverging sizes. On the other hand, the reheated sample exhibits a sharp magnetic transition at 16 K. External-field Mössbauer measurements of the latter reveal spin canting to be exclusively present on the octahedral sites which disappears at the magnetic transition temperature. These results show that this spinel compound exhibits a transition to a spin-glass for which the random freezing only occurs on the octahedral sites.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A.M. Alakrmi, R.E. Vandenberghe, E. De Grave,