バリウムフェライト系新酸化物テープの電磁変換特性

抄録

Perpendicularly and longitudinally oriented (PO and LO) tapes were prepared from spinel rich barium ferrite pigments with different coercivity (H_c). SFD and SFDr for LO tapes were much smaller than those for the metal particulate (MP) tape. Their outputs were measured on a drum tester using a sendust sputtered sheet laminated head. In low recording density rigion, the LO tapes showed greater output than the PO tapes. However, in high recording density region, the PO tapes showed about 3dB greater outputs than the LO tapes with almost the same H_c values in the oriented direction. D₅₀ of the LO tape was greater than that of MP tape for almost the same longitudinal H_c value.