Direct Evidence for Magnetic Domains in Silver

Abstract

Pulsed NMR studies of ${}_{}{}^{109}{}_{}{}^{}\mathrm{Ag}$ nuclei in a single-crystal specimen of Ag metal at helium temperatures with an applied field $H_0\cong 90$ kOe reveal the presence of magnetic domains due to de Haas-van Alphen magnetization through the associated splitting of the ${}_{}{}^{109}{}_{}{}^{}\mathrm{Ag}$ NMR line. Domain formation is found to have the expected de Haas-van Alphen periodicity, and the domains behave in generally good accord with theory.