Type of Thesis
John C. Price
Measurements of the NMR line shape of 4.6832% abundant 29Si in single-crystal silicon for four different crystallographic orientations relative to the applied magnetic field are reported. Significant inhomogeneous line broadening is avoided by immersing the sample crystals in a susceptibility matched liquid, and the proton NMR line shape in the liquid is used to measure the residual susceptibility mismatch and to shim the applied field. The observed line shapes are shown to be in good agreement with disorder-averaged spin dynamics simulations performed on a 4 x 4 x 4 unit cell lattice with periodic boundary conditions. The splitting of resolved doublet features is used to measure the asymmetry Delta J of the nearest-neighbor indirect dipole or J-coupling tensor, with the result Delta J=90 plus or minus 20 Hz. All resolved doublets can be identified with specific nearest and next-nearest neighbor isolated spin pairs that occur in the disorder ensemble.
Christensen, Brooks, "Nuclear magnetic resonance line shape of 29Si in single-crystal silicon" (2017). Undergraduate Honors Theses. 1315.