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Melting and defect generation in chemical vapor deposited diamond due to irradiation with 100 MeV Au+ and Ag+ ions

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Title Melting and defect generation in chemical vapor deposited diamond due to irradiation with 100 MeV Au+ and Ag+ ions
 
Creator MISRA, DS
PALNITKAR, UMESH
TYAGI, PK
SINGH, MANOJ K
TITUS, E
AVASTHI, DK
VASA, P
AYYUB, PUSHAN
 
Subject chemical vapor deposition
ion bombardment
diamond
 
Description Diamond windows prepared using hot filament chemical vapor deposition (CVD) were irradiated with Au and Ag ions of energy 100 and 130 MeV, respectively with fluence in the range 1010 to 3 × 1013 ions/cm2. Scanning electron microscopy (SEM) images showed substantial damage at the surface of the windows irradiated with Au+ of energy 100 MeV and fluence of 3 × 1013 ions/cm2. At some locations on the diamond windows deposited at 16 kPa, the surface layer appeared to have melted and flowed like a liquid exposing small crystallites underneath. Raman spectra of windows after irradiation showed i) a decrease in the intensity of the one-phonon line at 1332 cm− 1 along with an increase in its half width; ii) substantial reduction in the intensity of the graphite G band; and, iii) the appearance of a new band at 667 cm− 1. The band at 667 cm− 1 did not have a corresponding Stokes line and was therefore identified as a photoluminescence (PL) band. The ion induced damage and localized melting of CVD diamond windows are discussed in terms of the thermal spike model.
 
Publisher Elsevier
 
Date 2009-04-26T09:00:00Z
2011-12-08T06:34:27Z
2011-12-26T13:01:40Z
2011-12-27T05:45:59Z
2009-04-26T09:00:00Z
2011-12-08T06:34:27Z
2011-12-26T13:01:40Z
2011-12-27T05:45:59Z
2006
 
Type Article
 
Identifier Thin Solid Films 503(1-2), 121-126
0040-6090
10.1016/j.tsf.2005.11.029
http://hdl.handle.net/10054/1247
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1247
 
Language en