Cross relaxation in gamma -irradiated ruby
- 28 March 1973
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 6 (6) , 1063-1073
- https://doi.org/10.1088/0022-3719/6/6/019
Abstract
Measurements have been made of the increase, following gamma -irradiation, in the spin-lattice relaxation rate of Cr3+ ions in ruby and of the reduction of this produced by subsequent ultraviolet irradiation. Measurements of the changes in strength of the resonant phonon scattering at approximately 6 cm-1 produced by the same treatments showed that the additional relaxation rate was proportional to the strength of the resonant phonon scattering over much of the range. It is concluded that both effects are due to Cr2+ ions and that the limiting process in the relaxation is cross relaxation between Cr3+ and Cr2+ ions. In the crystals used, the mean chromium ion separation was approximately 40 AA and the cross-relaxation time at 42K was approximately 1.2*10-4 s.Keywords
This publication has 20 references indexed in Scilit:
- An investigation of the ground state of Cr2+in MgO based on thermal conductivity measurementsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1972
- Relaxation time analysis of thermal conductivity data using a computerJournal of Physics C: Solid State Physics, 1972
- The properties of exchange-coupled triads of Cr3+ions in rubyJournal of Physics C: Solid State Physics, 1971
- Magnetic Susceptibility and Optical Studies of Cr3+ in Al2O3 (Ruby): Magnetic Method for Determing ConcentrationJournal of Applied Physics, 1971
- The acoustic paramagnetic resonance of x-irradiated rubyJournal of Physics C: Solid State Physics, 1970
- A reliable low thermal resistance bond between dielectrics and metals for use at low temperaturesCryogenics, 1970
- Relaxation processes in irradiated rubiesJournal of Physics C: Solid State Physics, 1969
- Zero-field spin-lattice relaxation of the Cr3+ ion in rubyJournal of Physics C: Solid State Physics, 1969
- An investigation of phonon scattering by chromous ions in MgO by thermal conductivity measurementsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1969
- Thermal conduction in artificial sapphire crystals at low temperatures I. Nearly perfect crystalsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1955