Nuclear-Magnetic-Rosonance Study of Thulium Aluminum Garnet
- 1 March 1970
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 1 (5), 1978-1986
- https://doi.org/10.1103/physrevb.1.1978
Abstract
The and the nuclear magnetic resonance have been studied in cubic thulium aluminum garnet. The results at 1.5°K give magnetic-susceptibility tensor components of , , and and emu/g ion, which show much more anisotropy than found previously for thulium gallium garnet. The measured paramagnetic shifts at 1.5°K agree quite well with values calculated from -ion dipole sums. The paramagnetic shifts from 1.5 to 300°K are used to calculate the approximate temperature dependence of the -ion susceptibility components. The room-temperature quadrupolar coupling constants for the axially symmetric and sites are 0.892±0.005 and 6.155±0.005 MHz, respectively. The unshielded electric field gradients are calculated and compared with corresponding values for other aluminum garnets and for sites in several iron garnets. These field gradients agree quite well with values calculated using a point-charge model.
Keywords
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