129 citations · 144 across the 4 of their papers we have counts for
4 papers
Non-monotonic field-dependence of the ZFC magnetization peak in some systems of magnetic nanoparticles
R. Sappey, E. Vincent, N. Hadacek +3
We have performed magnetic measurements on a diluted system of gamma-Fe2O3 nanoparticles (~7nm), and on a ferritin sample. In both cases, the ZFC-peak presents a non-monotonic fiel…
Low-Temperature Features of Nano-Particle Dynamics
R. Sappey, E. Vincent, M. Ocio +1
In view of better characterizing possible quantum effects in the dynamics of nanometric particles, we measure the effect on the relaxation of a slight heating cycle. The effect of…
A new experimental procedure for characterizing quantum effects in small magnetic particle systems
R. Sappey, E. Vincent, M. Ocio +4
A new experimental procedure is discussed, which aims at separating thermal from quantum behavior independently of the energy barrier distribution in small particle systems. Magnet…
Anomalies in the Relaxation of Small Magnetic Particles at Very Low Temperatures
R. Sappey, E. Vincent, J. Hammann +3
The 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 dis…