High Performance Magnetic Head for MiniDisc System

A compact and thin magnetic head is indispensable in obtaining a compact MiniDisc (MD) system for both a portable audio device and a computer data storage device. Double speed recording operation is also important. To satisfy the requirements, we have developed a compact and thin magnetic head for MD system by optimizing the core shape with a high magnetic flux efficiency. This head adopts a newly developed low loss Mn-Zn ferrite for the head core. The magnetic head enables double speed recording operation from 400 kHz to 1.44MHz at the disk velocity of 2.8m/s, in addition to stable following ability and sliding durability to the disk rotation