NUCLEAR MAGNETIC RESONANCE IN GALLIUM ANTIMONIDE
The effects of both n-type and p-type impurities on the resonances of Ga/ sup 69/, Ga/sup 71/, and Sb/sup 121/ were studied. P-type impurity concentrations of approximately 10/sup 19/ cm/sup -3/ reduce the resonance intensity by approximately 60 per cent in Ga/sup 69/ and Ga/sup 71/ and by 75 per cent in Sb/sup 121/. This reduction is attributed to the quadrupolar interaction between the nuclei and the charged impurity centers and implies fairly large "antishielding factors." The values deduced are 49 for Sb/sup 121/, 175 for Ga/sup 69/, and 321 for Ga/sup 71/. A negative frequency shift of 1.3 kc/ s was observed in the Sb/sup 121/ it resonance for a p-type impurity concentration of 6 x 10/sup 19/ cm/sup -3/ , and a similar shift was observed in an n-type sample (impurity concentration 2 x 10/sup 18/ cm/sup -3/). Both these displacements are ascribed to a second-order quadrupolar effect. No frequency shifts were observed for the gallium resonances. (auth)
- Research Organization:
- Services Electronics Lab., Baldock, Herts, Eng.
- NSA Number:
- NSA-14-008112
- OSTI ID:
- 4197923
- Journal Information:
- Phys. and Chem. Solids, Vol. Vol: 11; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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