J. Phys. IV France 07 (1997) C1-151-C1-152
High Performance Magnetic Head for MiniDisc SystemT. Roppongi1, I. Chiba1, T. Minakawa2, T. Okamoto1, T. Wada1 and I. Sato1
1 Advanced Products Development Center, TDK Corporation, 2-15-7 Higashi-Ohwada, Ichikawa-shi, Chiba 272, Japan
2 Materials Research Center, TDK Corporation, 570-4 Aza-Matsugashita, Minami-hatori, Narita-shi, Chiba 286, Japan
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.
© EDP Sciences 1997