First Order Raman Spectrum of Diamond at High Temperatures
Abstract
Measurements of the first order Raman spectrum in natural type IIa diamond for the temperature range of 293 K to 1850 K are presented. Both the stokes and anti-Stokes components are analyzed for their intensity, Raman shift, and width variation with temperature. Optical pyrometry was used to make the temperature measurements, the results of which were independently confirmed by the Stokes to anti-Stokes intensity ratios. The shift and width variations with temperature are in general agreement with the molecular dynamics simulation of C.Z. Wang, C.T. Chan, and K.M.Ho. Heating of the samples to temperatures as high as 1850 K in vacuo could be performed without any evidence of polymorphic conversion to graphite, also in agreement with previous investigations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 22, 1990
- Accession Number
- ADA230625
Entities
People
- Harald Herchen
- Mark Cappelli
Organizations
- Stanford University