Conference paper
Effect of Inter-Particle Interactions on the Superparamagnetic Relaxation Time in Ferrofluids
The influence of dipolar interactions in a frozen ferrofluid consisting of maghemite particles has been studied by Mossbauer spectroscopy in the temperature range from 60 to 200 K. Four samples with volume concentrations ranging from 0.3 to 17.7 % have been investigated. The superparamagnetic blocking temperature decreases when increasing the volume concentration of maghemite particles, indicating that the relaxation time decreases with increasing interaction strength.
These results are discussed in the light of computer simulations of the superparamagnetic relaxation time as a function of the dipolar interaction strength.
Language: | English |
---|---|
Publisher: | SIF |
Year: | 1996 |
Pages: | 524-532 |
Proceedings: | International Conference on the Applications of the Mössbauer Effect |
Types: | Conference paper |