A research group led by Professor Shinichi Ohkoshi of the University of Tokyo has succeeded in developing a nano-sized hard ferrite magnet made of iron oxide.If this is used, it may be possible to increase the capacity of magnetic recording media such as magnetic tapes and hard disks.
Professor Ogoshi and his colleagues succeeded in producing 7.5 nm (1 nanometer = 0.0000000001 m) particles while preserving the properties of magnets by wrapping iron compounds, which are the material of iron oxide, in glass and performing heat treatment. ..It is overwhelmingly smaller than the minimum size of ferrite magnets known so far, and has the magnetic strength required for recording.From this, we can expect an increase in the capacity of the magnetic recording medium.
If this magnet is used, even if the amount of digital data recorded increases in the future, it may be possible to handle it at low cost without burdening the environment.In addition to magnetism, it has some unique properties and is expected to be used for other purposes.