SPIN-ECHO MEASUREMENT OF THE SPIN-LATTICE AND SPIN-SPIN RELAXATION IN Ce$sup 3+$ IN LANTHANUM MAGNESIUM NITRATE
Fast-resolution time-pulsed microwave apparatus was used to measure the spin-spin and spin-lattice relaxation in Ce/sup 3+/in lanthanum magnesium nitrate by spin-echo techniques. T/sub 1/, measured by a three-pulse sequence, varies as T/sub 1/ = 6 x 10/sup -10/ exp(34/T) over a range of four orders of magnitude from 4 to 1.8 deg K but changes less rapidly below this temperature. T/sub 2/, measured by the decay of the echo following a two-pulse sequence, is approximately 1 mu sec at 1.4 deg K and drops very rapidly above 3 deg K. The accuracy of the numerical values does not seem to be seriously affected by spectral diffusion within the line, but the echo envelope exhibits a strinking amplitude modulation which we attribute to surrounding nuclear moments which makes accurate determination of T/sub 2/ quite difficult. (auth)
- Research Organization:
- Lockheed Research Labs., Palo Alto. Calif.
- NSA Number:
- NSA-16-010722
- OSTI ID:
- 4808841
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 124; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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