NMR of ¹⁰⁹Ag and ¹⁹F in Ag₂F–Modified Korringa Relation in a Two-Dimensional Metal

Abstract

The spin-lattice relaxation time T 1 and the Knight shift K for 109 Ag in Ag 2 F have been measured between 4.2 and 77 K at 10.7 MHz. The results T 1 T =12.9±1.3 (secK) and K =+0.38±0.01 (%) are discussed in terms of the modified Korringa relation in the case of a two-dimensional metal. The temperature and frequency dependence of T 1 of 19 F was reexamined. The contribution of the Knight shift to the total shift of 19 F in Ag 2 F is estimated to be 0.025±0.002 (%).