Abstract
The spatial correlations in magnetite-based ferrofluids (FF) with pentanol carrier have been investigated by small-angle neutron scattering, as dependent on the concentration of magnetic phase ( C = 0.6 – 2 0 vol % ) and temperature (20–85 °C). Some peculiarities in the structure of FF were detected. An anomalous increase of short range order by heating of low-concentrated FF ( C ∼ 0.6 – 4.0 vol % ); the formation of short range order at ambient temperature which weakens at growing concentrations C = 7 – 1 4 vol % and the existence of a stable structure at the highest concentration C ∼ 2 0 vol % when particles’ shell interpenetrate. Neutron scattering data are discussed with regard to the particles’ intrinsic magnetisation enhancement induced by ordering.
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