The University of Tokyo

Fumiyoshi Hakoe

Kazuhito Hashimoto

Shin-ichi Ohkoshi

Hiroko Tokoro

Yoshihide Tsunobuchi

Deepa Dey

A titanium oxide particle that can develop non-conventional and novel physical properties, a method for manufacturing the same, and a magnetic memory, an optical information recording medium, and a charge accumulation type memory using the same are provided. A silica-coated titanium hydroxide compound particle is directly produced through a sol-gel technique and not through a reverse micelle technique, and the silica-coated titanium hydroxide compound particle is subjected to a calcination process. Hence, a titanium oxide particlecan be provided which can develop non-conventional and novel physical properties such that it does not perform phase transition at a room temperature and a TiOparticle body can always maintain the characteristic as a paramagnetic metal in all temperature ranges unlike conventional bulk bodies that perform phase transition between a non-magnetic semiconductor and a paramagnetic metal at a temperature near about 460 K.

Titanium oxide particles, process for producing same, magnetic memory, optical information recording medium, and charge accumulation type memory

A microstructure that can develop non-conventional and novel physical properties and a method for producing the same are provided. Ethanol is added to a mixture solution produced by adding a surfactant solution to a peroxotitanic acid aqueous solution to produce precipitates, and the precipitates collected from the mixture solution are let dried to produce precursor powders. The precursor powdersare calcined at a predetermined temperature. Accordingly, a microstructurecan be produced which is formed of monophasic TiOin nano size. The microstructureof monophasic TiOproduced in this fashion can be fine-grained in nano size unlike prior-art crystals.

Microstructure and manufacturing method therefor

There are provided a fine structural body capable of manifesting an unprecedented property; a manufacturing method thereof; and a magnetic memory, a charge storage memory and an optical information recording medium employing such fine structural body. Unlike conventional bulk bodies phase-transited between nonmagnetic semiconductors and paramagnetic metals around about 460K, there can be provided a fine structural bodycomprised of TiO, but capable of manifesting an unprecedented property in which a paramagnetic metal property thereof is consistently maintained in all temperature ranges without undergoing phase transition to a nonmagnetic semiconductor.

Growing community of inventors

Tokyo, Japan

Fumiyoshi Hakoe