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Adhesive contact modeling for sub-5-nm ultralow flying magnetic storage head-disk interfaces including roughness effects
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10.1063/1.1914951
/content/aip/journal/jap/97/10/10.1063/1.1914951
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/10/10.1063/1.1914951

Figures

Image of FIG. 1.
FIG. 1.

Interfacial forces present at an ultralow flying HDI; =external force (preload), =air-bearing force, =adhesive force, and =contact force.

Image of FIG. 2.
FIG. 2.

Simplified HDI geometries; (a) two flat parallel surface interaction and (b) sphere on flat surface interaction with contact radius .

Image of FIG. 3.
FIG. 3.

van der Waals forces for two flat parallel surfaces and a sphere on a flat surface configurations ( for Z-Tetraol lubricant on carbon overcoat).

Image of FIG. 4.
FIG. 4.

Noncontact individual adhesive forces vs separation for two flat parallel surfaces with , where is the van der Waals force, is the electrostatic force, is the meniscus force, and is the IDMT adhesive force.

Image of FIG. 5.
FIG. 5.

Equivalent isotropic rough surface in contact with an infinitely smooth surface (a) before the onset of contact (b) in contact .

Image of FIG. 6.
FIG. 6.

AFM topographical images of disks and slider samples measured at : (a) Disk 1, (b) disk 2, (c) disk 3, and (d) slider.

Image of FIG. 7.
FIG. 7.

Electrostatic force extended to rough surfaces as a function of separation: Case 1 (, ), case 2 (, ), and case 3 (, ).

Image of FIG. 8.
FIG. 8.

Adhesive force based on the ISBL and proposed adhesive models vs separation for contact between disk and slider surfaces: Case 1 (, ), case 2 (, ), and case 3 (, ) for (showing the onset of contact separation at ).

Image of FIG. 9.
FIG. 9.

Net adhesive force based on the proposed adhesive model vs separation for contact between disk and slider surfaces; Case 1 (, ), case 2 (, ), and case 3 (, ) for (showing the onset of contact separation at ).

Image of FIG. 10.
FIG. 10.

Individual adhesive force predictions (two flat parallel surfaces) vs rough surface adhesion model predictions for case 3 (, ) for a nominal contact area of ; the inset compares the total adhesive forces from a two flat parallel surface geometry and the proposed model ( from the ISBL model ) predictions.

Tables

Generic image for table
Table I.

Nonretarded/retarded van der Waals and Casimir forces for two flat parallel surfaces and sphere on flat surface configurations. and are the nonretarded and retarded Hamaker constants, respectively. and are the Planck constant divided by and the speed of light, respectively.

Generic image for table
Table II.

HDI roughness parameters of slider and magnetic disks: Case 1-rough, case 2-smooth, case 3-supersmooth.

Generic image for table
Table III.

Material properties and other parameters for supersmooth HDI.

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/content/aip/journal/jap/97/10/10.1063/1.1914951
2005-05-11
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Adhesive contact modeling for sub-5-nm ultralow flying magnetic storage head-disk interfaces including roughness effects
http://aip.metastore.ingenta.com/content/aip/journal/jap/97/10/10.1063/1.1914951
10.1063/1.1914951
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