The effects on Ni/sub 3/P-sublayer on the properties of CoNiCr/Cr media using different substrates

The effects of sputtered Ni/sub 3/P-sublayer on the magnetic and recording properties of CoNiCr/Cr thin-film media are reported. The effect of Ni/sub 3/P-sublayer on the hysteretic properties varied with the type of substrate and the sample location on the disk. The addition of a Ni/sub 3/P-sublayer was shown to decrease the coercivity H/sub c/ of textured NiP/Al disk, while increasing the H/sub c/ of glass-ceramic disks. The Ni/sub 3/P-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 Ni/sub 3/P-sublayers.>