Density fluctuations and associated critical phenomena of water droplets in a water-in-oil microemulsion system have been studied. We have recently found a mean-field behavior in the "near-critical region", and this evidence suggested that a crossover from mean-field to non-mean-field behavior should be observed. Therefore, a measurement of small-angle neutron scattering was carried out at JAERI with more precise temperature steps. Indeed, the crossover from mean-field to 3D-Ising behavior was observed, and the result could be interpreted by the asymptotic crossover theory proposed by Belyakov and Kiselev.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering