Effect of Inter-Particle Interactions on the Superparamagnetic Relaxation Time in Ferrofluids.

Jianzhong Jiang, Steen Mørup, P. Svedlindh

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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.
Original languageEnglish
Title of host publicationProc. ICAME'95
Place of PublicationBologna
Publication date1996
Publication statusPublished - 1996
EventInternational Conference on the Applications of the Mössbauer Effect - Rimini, Italy
Duration: 10 Sept 199516 Sept 1995


ConferenceInternational Conference on the Applications of the Mössbauer Effect

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