Wear properties of perpendicular magnetic recording media

• Published in: IEEE transactions on magnetics Vol. 22; no. 5; pp. 349 - 351
• Main Authors: Yamaura, M., Yatabe, T., Matsuzawa, H., Kadokura, S., Sobajima, S.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.1986; Institute of Electrical and Electronics Engineers
• Subjects: Analysing. Testing. Standards; Applied sciences; Cleaning; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Glass; Magnetic heads; Magnetic materials; Magnetic properties; Materials science; Measurement of properties and materials state; Metals, semimetals and alloys; Metals. Metallurgy; Nondestructive testing; Perpendicular magnetic recording; Physical properties of thin films, nonelectronic; Physics; Protection; Rough surfaces; Specific materials; Surface roughness; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Testing; Transition metal Alloys; Experimental study; Bimetallic layer; Wear; Thin film; Magnetic recording
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.1986.1064578

Wear properties of sputtered Co-Cr/permalloy double layer on flexible substrate with and without an inorganic protective top layer were studied under simulated tribological conditions. A soft head slider (ex. glass) gave even severer damage to media than the hard one (ex. Al 2 O 3 -TiC), and a 200 Å thin inorganic protective top layer was effective enough to enhance resistance against wear. Read-write experiments were also done with use of the double layer flexible media with the protective top layer (200 Å in thickness) by running them on a specially designed driver unit with an Al 2 O 3 .TiC spherical SPT head. An out-put signal loss was no more than 3dB even after 10 million times of the head passes.