Nuclear Magnetic Resonance in Metallic Single Crystals

Abstract

A method is presented for observing nuclear magnetic resonance absorption in metallic single crystals. Single crystals thick compared to the skin depth are used and accurate corrections are made for the distortion due to eddy currents. Experimental results for aluminum and copper single crystals with the fixed magnetic field parallel to the [001], [$\overline{1}11$], and [$\overline{1}10$] directions, respectively, demonstrate the feasibility of the method. The Knight shifts in aluminum and copper are found to be isotropic and equal to the powder values. The experimental second moments vary with orientation approximately in proportion to the theoretical second moments, but are somewhat larger, as in the powders.