Characteristics of dual lubricant layers

Author

Katano, Tomonori ; Oka, Mineo ; Nakazawa, Shiniichi ; Aramaki, Tatsuro ; Kusakawa, Kazuhiro

Author_Institution

Device Technol. Lab., Fuji Electr. Corp. R&D Ltd., Nagano, Japan

Volume

39

Issue

5

fYear

2003

Firstpage

2489

Lastpage

2491

Abstract

Lubricant characteristics of dual lubricant layers, which consist of a first-lubricant bonded layer and second-lubricant mobile layer, were studied. The interface durability is evaluated by a pin-on-disk test. The spin-migration characteristic is evaluated based on the change in thickness of layers after disk spinning. The mobility is estimated from spreading profiles from the lubricant step. Dual lubricant layers , which consists of Z-dol as a mobile layer and Z-tetraol or AM as a bonded layer, shows high mobility, high interface durability, and low spin-migration performance. It is considered that these characteristics can be attributed to higher interaction between the bonded lubricant and the mobile lubricant due to strong polar end groups of the bonded lubricant.

Keywords

hard discs; lubrication; organic compounds; wear testing; wetting; Z-dol; Z-tetraol; dual lubricant layers; first-lubricant bonded layer; hard discs; interface durability; mobility; pin-on-disk test; second-lubricant mobile layer; spin-migration characteristic; spreading profiles; strong polar end groups; thickness; Bonding; Dip coating; Disk recording; Hard disks; Lubricants; Magnetic heads; Magnetic liquids; Optical recording; Surface resistance; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.816449

Filename

1233119