• Publications
  • Influence
Observation of PFPE lubricant film on magnetic disk surface by atomic force microscopy
  • H. Tani
  • Materials Science
  • 1 September 1999
We observed how PFPE lubricant film formed to magnetic disk surface using AFM with a fluoride coated probe. We found that PFPE lubricant did not uniformly cover the carbon protective surface butExpand
  • 31
  • 4
Direct Observation of PFPE Lubricants on Magnetic Disks
  • H. Tani, N. Tagawa
  • Materials Science
  • IEEE Transactions on Magnetics
  • 10 February 2009
Perfluoropolyether lubricant films on magnetic disks were observed by means of atomic force microscopy (AFM) with a fluoride-coated probe. The lubricant films could be observed directly because theExpand
  • 12
  • 2
Adhesion and Friction Behavior of Magnetic Disks With Ultrathin Perfluoropolyether Lubricant Films Having Different End-Groups Measured Using Pin-on-Disk Test
In this paper, the adhesion and friction forces between a glass pin and disk surfaces coated by lubricants with different numbers of hydroxyl endgroups (Z-03, Z-dol, Z-tetraol, and Z-TMD) wereExpand
  • 18
  • 2
Lubricant Depletion Characteristics Induced by Rapid Laser Heating in Thermally Assisted Magnetic Recording
In this study, fundamental research was conducted on lubricant depletion due to rapid laser heating in thermally assisted magnetic recording (TAMR) systems. The effects of lubricant film thickness onExpand
  • 53
  • 1
Conformation of Ultrathin PFPE Lubricants With Different Structure on Magnetic Disks—Direct Observation and MD Simulation
Three types of PFPE lubricants (Z-tetraol, TA-30, and D-4OH) with different molecular structures were coated on magnetic disks and the conformations of these films were studied by atomic forceExpand
  • 19
  • 1
Experimental Investigation of Local Temperature Increase in Disk Surfaces of Hard Disk Drives Due to Laser Heating During Thermally Assisted Magnetic Recording
In this study, a novel method was developed to evaluate the local temperature increase under steady-state conditions on disk surfaces of hard disk drives due to laser heating during thermallyExpand
  • 23
  • 1
Lubricant Pickup of Ultra-Thin PFPE Lubricants With Different Backbone Structures
Lubricant pickups on different perfluoropolyether (PFPE)-lubricant (Z-tetraol, D-4OH, and QA-40) films were compared by using a slider surface analyzing (SSA) tester developed to observe theExpand
  • 12
  • 1
Design of Carbon Surface Functional Groups on the Viewpoint of Lubricant Layer Structure
Chemical modification technique with X-ray photoelectron spectroscopy has been used for a quantitative analysis of surface functional groups of the carbon overcoats. As the nitrogen content in theExpand
  • 7
  • 1
Spreading Mechanism of PFPE Lubricant on the Magnetic Disks
The lubrication mechanism when the magnetic head is sliding on the magnetic disk in the drag test with cyclic interval rest periods, is discussed. A long rest period decreased the wear of disks andExpand
  • 17
  • 1
Reduction in Adsorption of Bearing Oil From Fluid Dynamic Bearings of Hard Disk Drive Spindle Motor by Diamagnetism
In this study, we focused on the diamagnetism of ester lubricant oil for fluid dynamic bearings (FDBs) and investigated the effect of a magnetic field on oil vapors. We vaporized the lubricant oilExpand
  • 3
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