TITANIUM OXIDE PARTICLES, PROCESS FOR PRODUCING SAME, MAGNETIC MEMORY, OPTICAL INFORMATION RECORDING MEDIUM, AND CHARGE ACCUMULATION TYPE MEMORY

摘要

Provided are titanium oxide particles capable of exhibiting novel material properties, a process for producing the particles, and a magnetic memory, an optical information recording medium, and a charge accumulation type memory which each is formed using the particles. Titanium hydroxide compound particles coated with silica are directly produced by not a reverse micelle method but a sol-gel method. The silica-coated titanium hydroxide compound particles are burned. Thus, it is possible to provide titanium oxide particles (1) capable of exhibiting novel material properties which enable the Ti3O5 particles themselves to always retain the nature of a paramagnetic metal throughout the whole temperature range without undergoing a phase transition at room temperature, unlike conventional bulk materials that undergo phase transitions between a non-magnetic semiconductor and a paramagnetic metal at a temperature around 460K.