Title :
High frequency read/write characteristics for laminated Fe-Ta-N heads
Author :
Okumura, Toshiyuki ; Osaka, Akihiro ; Ishiwata, Nobuyuki ; Takeshima, Yoshio ; Urai, Haruo
Author_Institution :
NEC Corp., Kanagawa, Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
A laminated Fe-Ta-N video head for high frequency operation has been investigated at 18.5 m/s head tape speed with high coercivity (>1500 Oe) metal tapes. Compared with the same design laminated Sendust head, the Fe-Ta-N head shows more than 3 dB higher C/ N, at least 1.5 dB superior recording capability in the range from 1 MHz up to 50 MHz, and higher reproducing capability in the high frequency range above 20 MHz. The head magnetization observation, using a scanning Kerr effect microscope (SKEM), revealed that the outstanding read/write characteristics result from permeability response for the Fe-Ta-N film in the high frequency region. The laminated Fe-Ta-N heads were found to be the best suited for high data transfer rate recording systems, especially for digital video cassette recorders
Keywords :
coercive force; iron alloys; laminates; magnetic heads; magnetic recording; magnetic thin film devices; tantalum alloys; video recording; 1 to 50 MHz; FeTaN laminated video head; SKEM; carrier to noise ratio; coercivity; digital video cassette recorders; head magnetization; high data transfer rate recording systems; high frequency operation; laminated Sendust head; permeability response; read/write characteristics; scanning Kerr effect microscope; tape speed; Coercive force; Digital recording; Frequency; Magnetic cores; Magnetic heads; Magnetic materials; Magnetic separation; National electric code; Saturation magnetization; Video recording;
Journal_Title :
Magnetics, IEEE Transactions on
