PARAMAGNETIC RELAXATION IN CRYSTALS.
Abstract
Several studies of paramagnetic relaxation in crystals were carried out. The results include: (1) Extension of the experimental technique to narrow lines (about 50 millioersteds wide) and to very wide lines (more than 1000 gauss) and to very long relaxation times (many hours). (2) Discovery of a novel temperature dependence of the spin-lattice relaxation time (approximately T(3-)). (3) An attempted extension of relaxation theory relating the T(3-) effect to low-frequency mechanical resonances at the defect sites. (4) Establishment of the spin-lattice relaxation time intrinsic to the Fcenter in KCl by observing its dependence on temperature from 2.1 to 250 K and on magnetic field from 300 to 10,000 oersted to be independent of concentration in samples prepared in 'our best way.' (5) Fitting the theory of T sub 1 for F-centers to a physical model involving only magnetic hyperfine coupling. (6) Observation and preliminary identification of the strange, asymmetric shape of the paramagnetic resonance absorption due to Ti(+3) ions in corundum. (7) Observation of the T sub 1 of some of the Ti(+3) ions (those ions having g = 1.0 with H parallel to the c-axis) in corundum and identification by its temperature dependence of the energy of the lowest lying excited state as being 52 K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0600089
Entities
People
- D. W. Feldman
- J. G. Castle Jr.