Proton spin lattice relaxation in ferroelectric NaNH4-tartrate

Abstract Proton spin lattice relaxation time T 1 has been studied in the ferroelectric NaNH 4 -tartrate and in the solid solution of NaNH 4 -tartrate and NaK-tartrate. The temperature dependence of T 1 can be explained as due to the NH 4 and H 2 O motion.