Laminated CoZr amorphous thin-film recording heads

Abstract

Recording heads with four-layer laminated CoZr/Ta films as pole pieces have been fabricated using rf sputter deposition and ion milling techniques. Typical 4πMs of 14 000 G were obtained for CoZr amorphous films compared with 10 000 G for Permalloy films. Recording tests performed with this laminated CoZr/Ta film head indicate 8–12 dB better overwrite than with plated Permalloy film heads having an identical structure. However, the former exhibits a 10%–25% lower amplitude than the latter. This may be attributed to the thermal degradation of the initial permeability μi of the CoZr film during head-fabrication processes. This CoZr/Ta head also shows poorer amplitude stability than the plated Permalloy head.

Influence of heat treatment on the structure and magnetic properties of the Co/Zr and Co/Hf multilayer amorphous films

“…Their great promise for use in thin film heads for high-density magnetic recording has been reported in several papers [4,5].…”

Influence of the Temperature on the Diffusion Coefficient Value during the Cobalt Electrodeposition on Different Substrates

“…Electrodeposited cobalt and cobalt alloys are widely used in the computer industry as recording media in both magnetic drum and magnetic tape memory systems [1]. Cobalt electrodeposition studies can be categorized according to the working electrode and the type of solution employed [2].…”