A process for preparing acicular gamma ferric oxide (maghemite) crystals exhibiting excellent magnetic recording properties is disclosed. These acicular gamma ferric oxide crystals are new materials and can be used in magnetic media such as magnetic tapes to obtain a low level of white noise without...http://www.google.de/patents/US4255492?utm_source=gb-gplus-sharePatent US4255492 - Magnetic recording crystals, process for producing same, and magnetic recording webs using same
