Unusual static and dynamic magnetic properties of Cd$_{1-y}$Mn$_y$S nanocrystals

N. Feltin , L. Levy , D. Ingert , E. Vincent (1) , M.P. Pileni

1 SPEC - UMR3680 - Service de physique de l'état condensé

Magnetic properties of Cd$_{1-y}$Mn$_y$S nanocrystals have been studied. They vary with the particle size and markedly differ from those observed in the bulk phase, in particular their interactions drastically increase compared to those observed in the latter case. A Mn$^{2+}$-Mn$^{2+}$ interaction enhancement with decreasing size involves changes in the magnetic phase diagram. For 4nm nanocrystals, a spin glass phase can be assumed.

Domaines: Physique Générale [physics.gen-ph]

N. Feltin, L. Levy, D. Ingert, E. Vincent, M.P. Pileni. Unusual static and dynamic magnetic properties of Cd$_{1-y}$Mn$_y$S nanocrystals. Journal of Applied Physics, 2000, 87, pp.1415-1423. ⟨10.1063/1.372028⟩. ⟨hal-00097904⟩