To serve the needs of high linear bit density recording and high data transfer rate, a new perpendicular recording hard disk media constitution is proposed. In the new hard disk media, a Co-Cr layer is directly deposited on a soft-magnetic Mn-Zn single-crystal ferrite substrate. The ferrite substrate hard disk showed superior high-frequency response to a conventional Co-Cr/Fe-Ni-Nb double-layered hard disk with glass substrate. This improvement in high frequencies is brought about by suppressing the eddy current losses because of high electric resistivity of the ferrite substrate.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics