Study of Lubricant Depletion Induced by Pulsed-Laser Irradiation Heating in Heat-Assisted Magnetic Recording

2018 ◽  
Author(s):  
Norio Tagawa ◽  
Hiroshi Tani ◽  
Yuki Uesaraie ◽  
Shinji Koganezawa ◽  
Renguo Lu
Keyword(s):  
Laser Irradiation ◽  
Laser Heating ◽  
Pulsed Laser ◽  
Duty Ratio ◽  
Full Width ◽  
Half Maximum ◽  
Continuous Laser ◽  
Lubricant Depletion ◽  
Pulsed Laser Heating ◽  
Pulsed Laser Irradiation

In this study, we experimentally investigated the lubricant depletion caused by pulsed-laser irradiation heating and discussed the fundamental characteristics, comparing it with the results obtained by continuous laser heating. As a result, it was found that the decrease in the lubricant depletion due to pulsed-laser heating was smaller than that to continuous laser heating and depended on an increase in the duty ratio as it increased. In addition, the lubricant depletion depends on the full width at half maximum (FWHM) of the temperature distribution due to pulsed-laser irradiation heating and increased as the FWHM increased. Therefore, it is also suggested that the lubricant depletion issue will not be so critical in actual HAMR systems because the FWHM would be very small.

scholarly journals Picosecond Photovoltaic Response in Tilted Lanthanum Doped Manganite Films

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Zhiqing Lu ◽  
Hao Ni ◽  
Jianfeng Xi ◽  
Xiaoming Li ◽  
Kun Zhao
Keyword(s):  
Thin Films ◽  
Laser Irradiation ◽  
Rise Time ◽  
Lattice Mismatch ◽  
Pulsed Laser ◽  
Full Width ◽  
Half Maximum ◽  
Photovoltaic Response ◽  
External Bias ◽  
Pulsed Laser Irradiation

Anisotropic picosecond photovoltaic responses were observed in lanthanum doped manganiteLaxCa1-xMnO3(x=0.67and 0.4) thin films, which were deposited on miscut LaSrAlO4substrates under ultraviolet pulsed laser irradiation without external bias. The 10%–90% rise time and the full width at half maximum of La0.67Ca0.33MnO3were 470 and 585 ps, respectively, and those of La0.4Ca0.6MnO3were 220 and 515 ps. The photovoltage sensitivities of La0.67Ca0.33MnO3and La0.4Ca0.6MnO3, which are sensitive to the concentrations of lanthanum of the samples, are 0.28 V/mJ and 3.47 V/mJ, respectively. The photosensitivity in the films deposited on MgO is higher than that in those deposited on LaSrAlO4substrates, for it has a big lattice mismatch. These results should open a route for the application of lanthanum doped manganite as an ultrafast photodetector material.

Molecular dynamics study of lubricant depletion by pulsed laser heating

2018 ◽  
Vol 440 ◽  
pp. 73-83 ◽  
Author(s):  
Young Woo Seo ◽  
Andreas Rosenkranz ◽  
Frank E. Talke
Keyword(s):  
Molecular Dynamics ◽  
Laser Heating ◽  
Pulsed Laser ◽  
Lubricant Depletion ◽  
Pulsed Laser Heating

Modification of structural and transport properties in epitaxial YBa2CU3Ox films by pulsed laser irradiation

1993 ◽  
Vol 3 (12) ◽  
pp. 2173-2188
Author(s):  
N. G. Chechenin ◽  
A. V. Chernysh ◽  
V. V. Korneev ◽  
E. V. Monakhov ◽  
B. V. Seleznev
Keyword(s):  
Transport Properties ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Pulsed Laser Irradiation

PULSED LASER IRRADIATION OF NICKEL THIN FILMS ON SILICON

1983 ◽  
Vol 44 (C5) ◽  
pp. C5-449-C5-454 ◽  
Author(s):  
P. Baeri ◽  
M. G. Grimaldi ◽  
E. Rimini ◽  
G. Celotti
Keyword(s):  
Thin Films ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Nickel Thin Films ◽  
Pulsed Laser Irradiation

FUNDAMENTALS OF PULSED LASER IRRADIATION OF SILICON

1983 ◽  
Vol 44 (C5) ◽  
pp. C5-23-C5-36 ◽  
Author(s):  
H. Kurz ◽  
L. A. Lompré ◽  
J. M. Liu
Keyword(s):  
Laser Irradiation ◽  
Pulsed Laser ◽  
Pulsed Laser Irradiation

Experimental evaluation of performance of concrete removal in pulsed laser irradiation

2016 ◽  
Author(s):  
Nguyen Phi Long ◽  
Hiroyuki Daido ◽  
Yukihiro Matsunaga ◽  
Tomonori Yamada ◽  
Akihiro Nishimura ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Experimental Evaluation ◽  
Pulsed Laser ◽  
Evaluation Of Performance ◽  
Pulsed Laser Irradiation

Surface modification of sintered magnesium oxide (MgO) with chromium oxide (Cr2O3) by pulsed laser irradiation in air and liquids

2021 ◽  
Author(s):  
Katia del Carmen Martínez Guzmán ◽  
Sadasivan Shaji ◽  
Tushar Kanti Das Roy ◽  
Bindu Krishnan ◽  
David Avellaneda Avellaneda ◽  
...  
Keyword(s):  
Surface Modification ◽  
Laser Irradiation ◽  
Magnesium Oxide ◽  
Chromium Oxide ◽  
Pulsed Laser ◽  
Pulsed Laser Irradiation
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