Molecular orientation of PFPE lubricant films and its quantification

Author

Gao, C. ; Dai, P.

Author_Institution

Akashic Memories Corp., Milpitas, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3118

Lastpage

3120

Abstract

The molecular orientation of piperonyl functional end groups (planar) of PFPE lubricants on carbon overcoat is investigated using FTIR (Fourier Transform Infrared). A molecular orientation index (MOI) is defined for the molecular orientation with respect to the disk surface. The MOI is found to be three times higher when all the planar end groups are perpendicular to the disk surface than for random orientation (MOI=1). The MOI strongly depends on process conditions for lubricant films thinner than ~5 nm. The wear durability of the lubricant films with the planar end groups preferably perpendicular to the carbon surface with MOI~1.5 is found to be a few times better than those preferably parallel to the carbon surface with MOI<1

Keywords

Fourier transform spectra; infrared spectra; lubrication; magnetic recording; molecular orientation; polymer films; C; FTIR spectrum; PFPE lubricant film; carbon overcoat; disk surface; molecular orientation index; piperonyl functional planar end group; wear durability; Amorphous magnetic materials; Anisotropic magnetoresistance; Fourier transforms; Lubricants; Magnetic anisotropy; Optical surface waves; Perpendicular magnetic anisotropy; Polymers; Probes; Solvents; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617863

Filename

617863