Title :
Barium ferrite particulate tapes for high-band 8 mm VCR
Author :
Yokoyama, Hirotaka ; Ito, Takeo ; Isshiki, Masanori ; Kurata, Kengo ; Fukaya, Toshio
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
Barium ferrite particulate media have been applied to recording tapes for a high-band 8 mm VCR, with full compatibility with metal particulate tapes, although they have remarkably different magnetic and recording characteristics. The compatibility of barium ferrite tapes to metal particulate tapes has been attained by adopting barium ferrite particles with an average diameter of 50 nm and a diameter to thickness ratio of 3.5, orienting the particles longitudinally, and adjusting coercivity to about 1300 Oe, which is about 200 Oe lower than the coercivity of metal particulate tapes
Keywords :
barium compounds; coercive force; ferrite applications; magnetic properties of fine particles; magnetic tapes; video tape recorders; BaFe12O19 tape; coercivity; compatibility; high-band VCR; metal particulate tapes; particulate tapes; Barium; Coercive force; Disk recording; Ferrites; Frequency; Magnetic noise; Magnetic recording; Saturation magnetization; Signal to noise ratio; Video recording;
Journal_Title :
Magnetics, IEEE Transactions on
