The effect of thermal treatments on both the Morin transition and the spin flop field (Hsf) of α-Fe2O3acicular particles (major axis: (350 ± 50) nm; minor axis: (85 ± 15) nm.) has been investigated by means of magnetization vs temperature-magnetic field measurements. Both the Morin transition and the spin flop process have been observed only after an annealing treatment at 500°C. Due to the finite size effect, the values of the Morin temperature and spin-flop field are significantly below the bulk value.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
Fiorani, D., Testa, A. M., Suber, L., Angiolini, M., Montone, A., & Polichetti, M. (1999). Size and shape effect on the canted antiferromagnetism in α-Fe. Nanostructured Materials, 12(5), 939 - 942. https://doi.org/10.1016/S0965-9773(99)00272-X