THE EFFECTS OF NI3P-SUBLAYER ON THE PROPERTIES OF CONICR/CR MEDIA USING DIFFERENT SUBSTRATES

The effects of sputtered Ni3P-sublayer on the magnetic and recording properties of CoNiCr/Cr thin film media are reported. The effect of Ni3P-sublayer on the hysteretic properties varied with the type of substrate and the sample location on the disk. The addition of a Ni3P-sublayer was shown to decrease the coercivity Hc of textured NiP/Al disk, while increasing the Hc of glass-ceramic disks. The Ni3P-sublayers on glass-ceramic disks were shown to promote c-axis in-plane orientation and thus increase signal outputs. The medium noise also tends to decrease by Ni3P. There are also some evidence showing the difference in noise characteristics between glass-ceramic and NiP/Al disks with Ni3P-sublayers.