2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27660The magnetization relaxation rate of small gamma-Fe2O3 particles dispersed in a silica matrix has been measured from 60 mK to 5 K. It shows a minimum around 150 mK, that can be discussed in terms of either thermal or quantum relaxation regime.8 pages, 4 figuresCondensed Mattertext