Abstract
In these decades, amphiphilic systems are widely interested as typical systems to investigate self-organizations in soft-matter physics. A mixture of AOT, water and decane is the most popular systems in such the studies. The temperature-and pressure-induced phase transitions have been invesitigated by means of small-angle neutron and X-ray scattering and neutron spin echo. The results showed that the microscopic origins of temperature-and pressure-induced phase transitions were different, however, the effects of temperature and pressure on the semi-microscopic scale structure seemed to be the same.