Thermal stability evaluation of diamond-like carbon for magnetic recording head application using raman spectroscopy
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Publication Details
Author list: Khamnualthong N., Siangchaew K., Limsuwan P.
Publisher: Elsevier
Publication year: 2012
Volume number: 32
Start page: 888
End page: 894
Number of pages: 7
ISSN: 1877-7058
Languages: English-Great Britain (EN-GB)
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Abstract
Diamond-like carbon (DLC) films were deposited on magnetic recording heads using filter cathodic arc for improvement of tribological property and corrosion protection. To increase the areal density of magnetic storage, the thickness of DLC film has to be decreased to less than few nanometers. In addition, the heat occurred at the head-disk interface during the operation can impact on the properties and protective performance of DLC films. In this work, the effect of heat on the properties of DLC films was investigated by visible Raman spectroscopy. The Raman spectra of DLC film as a function of heating temperature and time were carried out. The Raman spectra revealed that the degree of graphitization of the DLC films increased with increasing of temperature and time. The relative Raman intensity was found to decrease with possibility of sp3/sp2 ratio decreasing in the films. It can be concluded that the thermal stability of DLC film degraded at high temperature environment. ฉ 2010 Published by Elsevier Ltd.
Keywords
Diamond-like carbon, DLC
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