Accession Number:

AD0600089

Title:

PARAMAGNETIC RELAXATION IN CRYSTALS.

Descriptive Note:

Final rept., 15 May 62-31 Oct 63,

Corporate Author:

WESTINGHOUSE RESEARCH LABS PITTSBURGH PA

Personal Author(s):

• Castle,J. G. ,Jr.
• Feldman,D. W.

Report Date:

1964-01-01

Pagination or Media Count:

14.0

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 T3-. 3 An attempted extension of relaxation theory relating the T3- 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 Ti3 ions in corundum. 7 Observation of the T sub 1 of some of the Ti3 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

Descriptors:

• MAGNETIC PROPERTIES
• RELAXATION TIME
• PARAMAGNETISM
• CRYSTALLOGRAPHY

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE