Carbon Overcoat Oxidation in Heat-Assisted Magnetic Recording

2013 ◽  
Vol 49 (7) ◽  
pp. 3721-3724 ◽  
Author(s):  
B. K. Pathem ◽  
X.-C. Guo ◽  
F. Rose ◽  
N. Wang ◽  
K. Komvopoulos ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording

Thermal decomposition and desorption of PFPE Zdol on a DLC substrate using quartic bond interaction potential

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69651-69659 ◽  
Author(s):  
S. K. Deb Nath
Keyword(s):  
Thermal Decomposition ◽  
Interaction Potential ◽  
Magnetic Recording ◽  
Magnetic Layer ◽  
Hard Disk ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording ◽  
Reading And Writing ◽  
Bond Interaction ◽  
Laser Rays

In heat assisted magnetic recording (HAMR) system, heating of the hard disk magnetic layer is carried out by applying laser rays during the movement of the read/write head over the carbon overcoat for the purpose of reading and writing on its magnetic layer.

Laser-Heating-Induced Damage to Ultrathin Carbon Overcoat in Heat-Assisted Magnetic Recording

2013 ◽  
Vol 53 (1) ◽  
pp. 303-310 ◽  
Author(s):  
Y. S. Ma ◽  
Y. J. Man ◽  
M. Shakerzadeh ◽  
H. L. Seet ◽  
R. Ji ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Laser Heating ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording

Effect of Carbon Overcoat on Heat-Assisted Magnetic Recording Performance

2015 ◽  
Vol 51 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Siyang Xu ◽  
Shrabani Sinha ◽  
Ehsan Rismaniyazdi ◽  
Christopher Wolf ◽  
Paul Dorsey ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording

Laser Heating-Induced Degradation of Ultrathin Media Carbon Overcoat for Heat-Assisted Magnetic Recording

2016 ◽  
Vol 52 (2) ◽  
pp. 1-6 ◽  
Author(s):  
Yansheng Ma ◽  
Rong Ji ◽  
Yijun Man ◽  
Maziar Shakerzadeh ◽  
Rongyan Zheng ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Laser Heating ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording

Life Estimation of Carbon Overcoat on Magnetic Media for Heat-Assisted Magnetic Recording Using Novel Raman Spectroscopy

2016 ◽  
Author(s):  
M. Yanagisawa ◽  
M. Kunimoto ◽  
T. Homma
Keyword(s):  
Magnetic Recording ◽  
Laser Heating ◽  
Pulse Width ◽  
Heating Temperature ◽  
Irradiation Time ◽  
Near Field ◽  
Pulsed Laser ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording ◽  
Pulsed Laser Heating

A heat-assisted magnetic recording (HAMR) is expected for a future high density recording of a hard disk drive. However, a carbon overcoat (COC) composed of diamond-like carbon (DLC) or a lubricant film is possibly damaged when a magnetic medium, i.e. CoPt alloy, is heated at around Curie temperature (Tc) of 600K by a near-field HAMR head. We carried out HAMR simulation experiments by using newly developed Raman spectroscopic systems, composed of plasmonic sensors for surface-enhanced Raman scattering (SERS), a pulsed laser heating, and an in-situ temperature measurement with an intensity ratio of anti-Stokes/Stokes lines. It was found that the heated temperature of the COC is higher than that of the magnetic film, i.e., 580 °C and 366 °C, respectively. Intensity changes of G-band peak in Raman spectra for DLC films were observed during the pulsed laser heating. The Raman intensity was exponentially decreased by oxidation in air, where time constants were calculated as a parameter of a pulse width. Degradation life of the DLC film can be estimated from a critical pulse width, where the time constant is extrapolated to zero. The estimated pulse width for no degradation was 250μs at the heating temperature of 580 °C. The result shows no damage can be estimated in DLC films for HAMR because the effective irradiation time is 5ns and the accumulated irradiation time is 0.5ms in HAMR operations.

Simulation of magnetic footprints for heat assisted magnetic recording

2017 ◽  
Vol 78 (2) ◽  
pp. 20301
Author(s):  
Kotchakorn Pituso ◽  
Pirat Khunkitti ◽  
Anan Kruesubthaworn ◽  
Komkrit Chooruang ◽  
Damrongsak Tongsomporn ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Heat Assisted Magnetic Recording

A multi-functional testing instrument for heat assisted magnetic recording media

2014 ◽  
Vol 115 (17) ◽  
pp. 17B726 ◽  
Author(s):  
H. Z. Yang ◽  
Y. J. Chen ◽  
S. H. Leong ◽  
C. W. An ◽  
K. D. Ye ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Recording Media ◽  
Functional Testing ◽  
Magnetic Recording Media ◽  
Testing Instrument ◽  
Heat Assisted Magnetic Recording
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