Fig. 2: NMR magnetization curves and amplitudes.
From: Interfacial lithiation of lithium aluminum titanium phosphate explored by 7Li NMR

a Magnetization Mz(tdelay) transients of the 1.3Li-LATP sample that show bi-exponential behavior leading to the rates R1 fast and R1 slow, see Fig. 1c. The solid lines show fits with a sum of two stretched exponential functions. b The relative amplitudes of the two contributions that control overall relaxation as a function of the reciprocal temperature.