RESONANCE MODES AT DEFECTS IN CRYSTALLINE QUARTZ.
Abstract
The Raman spin-lattice relaxation time, T sub 1R, for the oxygen divacancy (E sub 1') center in synthetic crystalline quartz measured in applied magnetic fields of 3 KOe is accurately given by 1/T sub 1R = B(e to the x sub 1 power/ (e to the x sub 1 power - 1) to the 2nd power)+ C (e to the x sub 2 power/(e to the x sub 2 power - 1) to the 2nd power) + D e to the minus x sub 3 power where the coefficients are B = 0.25/sec, C = 250/sec, D = 300,000/sec, and the characteristic frequencies have the corresponding temperatures of x sub 1T = 20 = 2K, x sub 2T = 125 = 10K, and x sub 3T = 1400 = 300K. The two lower frequencies are interpreted in terms of mechanical resonances being localized at each center and having large resonant amplitudes. The highest frequency is tentatively associated with some of the optical modes of the SiO2 lattice. There is no evidence for relaxation by the acoustic modes having the normal Debye cutoff. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 17, 1964
- Accession Number
- AD0606051
Entities
People
- D. W. Feldman
- J. G. Castle Jr.